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15 February 2018
Editorial Board
Publication date: 15 February 2018
Source:Journal of Non-Crystalline Solids, Volume 482

15 February 2018
Quantification of excitation-power dependency in Tm3+/Yb3+ doped fluorotellurite upconverting glass phosphor for iris recognition
Publication date: 15 February 2018
Source:Journal of Non-Crystalline Solids, Volume 482 Author(s): Bingrui Li, Xin Zhao, Edwin Yue Bun Pun, Hai Lin Excitation-power dependency of upconversion (UC) photons have been quantified in Tm3+/Yb3+ doped fluorotellurite (BALMT) glasses under the excitation of 975nm laser. The net powers of three-photon-excited blue and red and two-photon-excited NIR emissions are determined to be 242, 101 and 7994
15 February 2018
Estimation of thermal conductivity of silicate melts using three-dimensional thermal resistor network model
Publication date: 15 February 2018
Source:Journal of Non-Crystalline Solids, Volume 482 Author(s): Tsuyoshi Nishi, Hiromichi Ohta, Sohei Sukenaga, Hiroyuki Shibata The thermal conductivity of silicate melts was evaluated using a thermal resistor network model, which consisted of a diamond lattice. Based on the assumption that the mean free path of phonons is shorter than the interatomic distance, the thermal conductivity of the silicate melts was calculated through a Monte-Carlo simulation based on the non-bridging oxygens to tetrahedral cations (NBO/T) ratio and the ratio of the conductance of silicon with NBOs (CSi-NBO) to that of silicon with bonding oxygens (CSi-BO). For NBO/T<1, the simulated thermal conductivity of the silicate melts was in good agreement with that reported in the literature. Thus, the proposed method and the three-dimensional thermal resistor network model used are suitable for estimating the thermal conductivity of silicate melts.
15 February 2018
Network former mixing effects in ion-conducting lithium borotellurite glasses: Structure/property correlations in the system (Li2O)y[2(TeO2)x(B2O3)1
15 February 2018
XPS study of neptunium and plutonium doped iron-bearing and iron-free sodium-aluminum-phosphate glasses
Publication date: 15 February 2018
Source:Journal of Non-Crystalline Solids, Volume 482 Author(s): K.I. Maslakov, Yu.A. Teterin, S.V. Stefanovsky, S.N. Kalmykov, A.Yu. Teterin, K.E. Ivanov, S.S. Danilov The iron-free and iron-bearing (Np, Pu)-containing sodium-aluminum-phosphate glass samples were studied by X-Ray photoelectron spectroscopy. Oxidation states of neptunium, plutonium and iron, and elemental composition of the surfaces of the samples studied were determined. In both iron-free and iron-bearing glasses Np is present predominantly as Np(V) on the surface and Np(IV) in the bulk. Pu(III) dominates over Pu(IV)/(V) in the iron-free glass while oxidized forms of Pu prevail in the iron-bearing glass.
15 February 2018
Energy distribution and melting efficiency in glass melting channel: Diagram of melt flow types and effect of melt input temperature
Publication date: 15 February 2018
Source:Journal of Non-Crystalline Solids, Volume 482 Author(s): Luk
15 February 2018
Luminescent Rhodamine 6G/silica hybrid nanofibers with potential temperature sensing ability
Publication date: 15 February 2018
Source:Journal of Non-Crystalline Solids, Volume 482 Author(s): Jungang Cao, Haibao Lu, Min Yang, Qun Wang, Zhonglin Wei, Jianjun Li Photoluminescence properties of Rhodamine 6G dye confined in electrospun silica fiber are investigated in this manuscript. Uniaxial tensile test and environmental stability of such hybrid fibers are examined. Homogeneous distribution of Rhodamine 6G in silica fibers is confirmed by fluorescence image. Only J-type dimers are confirmed in our electrospun Rh6G/SiO2 hybrid fibers, and the increase of the Rh6G concentration gives rise to a progressive red shift and a broadening in the maximum emission spectra. The emission intensity of electrospun hybrid fibers can be sensitive to the temperature and the relative maximum emission intensity may decrease gradually in the whole measured temperature range.

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15 February 2018
Better understanding of the role of SiO2, P2O5 and Al2O3 on the spectroscopic properties of Yb3+ doped silica sol-gel glasses
Publication date: 15 February 2018
Source:Journal of Non-Crystalline Solids, Volume 482 Author(s): Benoit Glorieux, Turkka Salminen, Jonathan Massera, Mika Lastusaari, Laeticia Petit Yb3+ doped silica sol-gel glass powders were prepared with different concentrations of SiO2, Al2O3 and P2O5 in order to understand the impact of the glass composition on the Yb3+ emission properties. In this paper, we clearly show that not only the Al/P ratio but also the SiO2 content have an impact on the Yb3+ spectroscopic properties. Our results provide new insight on the real impact of the composition on the spectroscopic properties of Yb3+ doped sol-gels: we demonstrate that an increase in the Al2O3 content at the expense of P2O5 leads to an increase in the intensity of the emission at 1000nm of the Yb3+ ions whereas an increase in the SiO2 content decreases it. We clearly showed that the inexpensive sol-gel approach can be easily used when investigating new Yb3+ doped silica glasses.
15 February 2018
Identification of defects in the transition metal oxide-doped glass nanocomposite xV2O5(1-x)(0.05MoO30.95ZnO) using positron annihilation spectroscopy and other techniques
Publication date: 15 February 2018
Source:Journal of Non-Crystalline Solids, Volume 482 Author(s): Anindya Sundar Das, Madhab Roy, Debasish Roy, Sanjib Bhattacharya, P.M.G. Nambissan A series of transition metal oxide-doped glass nanocomposites of the common nomenclature xV2O5(1-x)(0.05MoO30.95ZnO) for x =0 to 0.9 have been synthesized through the melt quenching process and characterized by X-ray diffraction, Transmission electron microscopy and optical absorption spectroscopic studies. Positron annihilation lifetime and coincidence Doppler broadening measurements are also performed to identify the vacancy type defects present in the samples of the differing V2O5 concentration. The X-ray diffraction patterns showed clear diffraction peaks indicating the presence of nanocrystallites in samples of x =0, 0.1, 0.2 and 0.3 whereas significantly broadened patterns were additionally observed in the case of samples of x =0.5, 0.7 and 0.9 reflecting a dominant amorphous nature. Transmission electron microscopy images indicated the formation of nanocrystallites of varying sizes and morphologies and the high resolution transmission electron microscopy patterns showed well defined fringes, some of them showing discontinuities in samples of larger x. Further, selected area electron diffraction patterns displayed diffuse rings superposed with bright spots, indicating the formation of nanocrystallites dispersed in an amorphous matrix. The optical band gap energy estimated from the UVVis absorption measurements decreased with increasing content of V2O5. Positron lifetime measurements indicated the trapping of positrons in the interfacial gaps around the nanocrystallites for lower values of x (i.e., 0 to 0.3) and then in the porous defects within the amorphous matrix of the samples of higher values of x (=0.5 to 0.9). The coincidence Doppler broadening spectroscopic measurements further confirmed the presence of vacancy type defects arising from cation non-stoichiometry and the amorphous character of the largely doped nanocomposites. The studies demonstrated defect characterization as an alternative approach in the investigation of metal oxide nanocomposite formation and evolution during compositional variations and thermal treatments.
15 February 2018
Femtosecond laser induced surface modification for prevention of bacterial adhesion on 45S5 bioactive glass
Publication date: 15 February 2018
Source:Journal of Non-Crystalline Solids, Volume 482 Author(s): Shazia Shaikh, Deepti Singh, Mahesh Subramanian, Sunita Kedia, Anil Kumar Singh, Kulwant Singh, Nidhi Gupta, Sucharita Sinha Bacterial attachment and biofilm formation on implant surface has been a major concern in hospital and industrial environment. Prevention of bacterial infections of implant surface through surface treatment could be a potential solution and hence this has become a key area of research. In the present study, the antibacterial and biocompatible properties of femtosecond laser surface treated 45S5 bioactive glass (BG) have been investigated. Adhesion and sustainability of both gram positive S. aureus and gram negative P. aeruginosa and E. coli nosocomial bacteria on untreated and laser treated BG samples has been explored. An imprint method has been used to visualize the growth of bacteria on the sample surface. We observed complete bacterial rejection potentially reducing risk of biofilm formation on laser treated surface. This was correlated with surface roughness, wettability and change in surface chemical composition of the samples before and after laser treatment. Biocompatibility of the laser treated BG was demonstrated by studying the anchoring and growth of human cervix cell line INT407. Our results demonstrate that, laser surface modification of BG enables enhanced bacterial rejection without affecting its biocompatibility towards growth of human cells on it. These results open a significantly potential approach towards use of laser in successfully imparting desirable characteristics to BG based bio-implants and devices.
15 February 2018
Thermal and optical properties of Er3+ doped phosphate glasses
Publication date: 15 February 2018
Source:Journal of Non-Crystalline Solids, Volume 482 Author(s): S. Hraiech, N. Sdiri, K. Horchani-Naifer, M. F
15 February 2018
Synthesis and characterization of SiO2-MgO binary oxide system obtained by sol-gel method in anhydrous conditions
Publication date: 15 February 2018
Source:Journal of Non-Crystalline Solids, Volume 482 Author(s): Waldemar Nowicki, Zbigniew Pisku
15 February 2018
Development of Sm3+ doped ZnO-Al2O3-BaO-B2O3 glasses for optical gain medium
Publication date: 15 February 2018
Source:Journal of Non-Crystalline Solids, Volume 482 Author(s): L. Yuliantini, R. Hidayat, M. Djamal, K. Boonin, P. Yasaka, E. Kaewnuam, J. Kaewkhao Sm3+ doped ZnO-Al2O3-BaO-B2O3 glasses have been prepared and characterized. These glasses have been developed by melt and quenching technique. The characterization includes the physical, optical, luminescence, and radiative properties. The lasing potential of glass samples such as oscillator strengths, JO parameter, stimulated emission cross-sections, radiative transition probability, and branching ratios have been calculated by using Judd-Ofelt theory. The results show that the maximum intensity of emission spectra of the prepared glass sample is at the wavelength of 598nm due to the 4G5/2
15 February 2018
Physical and optical properties of thermally deposited Ge-S-Ga thin films
Publication date: 15 February 2018
Source:Journal of Non-Crystalline Solids, Volume 482 Author(s): Anjli Rana, Bhanu Pratap Singh, Raman Sharma Optical properties of Ge20S80
15 February 2018
Spectral properties and lifetime of green emission in
15 February 2018
Influence of rare earth ions on metal ions distribution and corrosion behavior of tailing-derived glass-ceramics
Publication date: 15 February 2018
Source:Journal of Non-Crystalline Solids, Volume 482 Author(s): Hongxia Zhang, Yongsheng Du, Xiaowei Yang, Xuefeng Zhang, Ming Zhao, Hua Chen, Shunli Ouyang, Baowei Li In understanding the influence of rare earth ions on crystallization, metal ions distribution, crack propagation and corrosion resistance of tailing-derived glass-ceramics, CeO2 containing glass-ceramics were prepared by melting method. Decrease of degree of crystallization of glass-ceramics with the increase of CeO2 content was maintained by the intensified stabilization of glass structure owing to the high electric field characteristics of Ce4+. A significant change in metal ions distribution can be observed in glass-ceramics with the increase of CeO2 content, which can result in the formation of aggregates. The aggregation induced by rare earth doping had a certain inhibiting effect on the propagation of cracks. In addition, the acid-resistance of glass-ceramics had been improved. The densification of the glass phase induced by the high field of Ce4+ was beneficial to the performance improvement.
15 February 2018
Perceiving impressive optical properties of ternary SiO2-TiO2-ZrO2:Eu3+ sol-gel glasses with high reluctance for concentration quenching: An experimental approach
Publication date: 15 February 2018
Source:Journal of Non-Crystalline Solids, Volume 482 Author(s): V.P. Prakashan, M.S. Sajna, G. Gejo, M.S. Sanu, P.R. Biju, J. Cyriac, N.V. Unnikrishnan Eu3+-doped ternary SiO2-TiO2-ZrO2 glasses were prepared through a non-hydrolytic sol-gel process. Fourier transform infrared spectroscopy was employed to identify the vibrational modes present in the ternary glass. The phonon energies were calculated using excitation spectrum and complemented well with the vibrational modes in the Raman spectrum. Photoluminescence spectrum was used to assess the luminescent augmentation. The uniform distribution of dopant ions in the as prepared ternary glass aided in achieving a comparatively unmatched doping concentration of Eu3+ ion (17.5wt%) without luminescence quenching and it can be attributed to reduced cluster formation. High concentration of rare earth ion incorporation leads to intense and tunable emission with higher brightness. Excellent color purity of the emission by means of CIE color gamut for the red color was observed, which is close to the National Television Standard Committee (NTSC) value. Theoretical investigations of the photophysical parameters and radiative decay time were carried out with Judd-Ofelt analysis. The double exponentially fitted decay curve gave a satisfactory experimental lifetime. These results indicate that tailor made europium doped ternary SiO2-TiO2-ZrO2 glasses have potential applications in the areas of photonic devices as well as biological sensors because of its intense tunable and efficient emission, high purity, and low toxicity.

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15 February 2018
Crossover from free propagation to cooperative motions of shear bands and its effect on serrated flow in metallic glass
Publication date: 15 February 2018
Source:Journal of Non-Crystalline Solids, Volume 482 Author(s): Bo Shi, Shiyu Luan, Peipeng Jin The serrated flow dynamics and shear band motions can be controlled by changing aspect ratio (AR) and deformation degree. With decreasing ARs, the serration pattern transforms from a sharp-peak type with uniform size into a complex type with various sizes, the ratio of stress drop time t D to rising time t R for serrated flow increases, the time intervals t n between adjacent serrations decreases. The serrated flow exhibits a crossover from Gaussian-type distribution to power-law-type distribution with decreasing ARs. This crossover is mainly governed by a transition from single-shear-band dominated deformation to cooperative motions of multiple shear bands dominated deformation. Additionally, such crossover can also be governed by deformation degree.
15 February 2018
Study of amorphous Zinc Germanium Nitride thin films grown by reactive co-sputtering
Publication date: 15 February 2018
Source:Journal of Non-Crystalline Solids, Volume 482 Author(s): Nicole Beddelem, N
15 February 2018
Structural stability of NaPON glass upon heating in air and nitrogen
Publication date: 15 February 2018
Source:Journal of Non-Crystalline Solids, Volume 482 Author(s): Georgiana Laura Paraschiv, Francisco Mu
15 February 2018
BaF2 modified Cr3+/Ho3+ co-doped germanate glass for efficient 2.0
15 February 2018
Scintillation and dosimetric properties of Ce-doped strontium aluminoborate glasses
Publication date: 15 February 2018
Source:Journal of Non-Crystalline Solids, Volume 482 Author(s): Naoki Kawano, Noriaki Kawaguchi, Go Okada, Yutaka Fujimoto, Takayuki Yanagida Strontium aluminoborate glasses with different concentrations of Ce (0, 0.01, 0.05, 0.1 and 0.5mol%) were synthesized by the conventional melt-quenching technique. After the synthesis, photoluminescence (PL), scintillation and dosimetric properties of the samples were evaluated systematically. In the photoluminescence and scintillation spectra, a sharp peak around 370nm due to the 5d-4f transitions of Ce was observed. The 0.05% Ce-doped sample showed the highest intensity in PL and scintillation among the samples investigated. The 0.010.1% Ce-doped samples also showed thermally-stimulated luminescence (TSL) with a glow peak of around 90C after X-ray irradiation. The TSL response of 0.010.05% Ce-doped samples increased monotonically with X-ray dose over a dose range of 10
15 February 2018
Linear and nonlinear optical properties of gold nanoparticles doped borate glasses
Publication date: 15 February 2018
Source:Journal of Non-Crystalline Solids, Volume 482 Author(s): G. Jagannath, B. Eraiah, K. NagaKrishnakanth, S. Venugopal Rao Gold nanoparticles (NPs) embedded in sodium antimony borate glass system were fabricated and their optical, physical, structural, ultrafast nonlinear optical properties were studied and analyzed. Metallic gold NPs were synthesized using thermal reducing agent Sb2O3 and demonstrated the reduction mechanism of Au3+/Au+
15 February 2018
Fabrication of W-Zr-Si thin film metallic glasses and the influence of post-annealing treatment
Publication date: 15 February 2018
Source:Journal of Non-Crystalline Solids, Volume 482 Author(s): Chia-Lin Li, Jen-Chun Chang, Bih-Show Lou, Jyh-Wei Lee, Jinn P. Chu The amorphous thin film metallic glasses (TFMGs) have been studied widely due to their unique properties and ease of fabrication as compared with the bulk metallic glasses (BMGs). Among the many TFMG systems, the W-based TFMG remains unstudied. In this work, a series of ternary W-Zr-Si TFMGs containing various W content ranging from 49.3 to 66.5at.% were fabricated using a magnetron co-sputtering system. Increasing the W content of W-Zr-Si TFMG rendered an increase of Young's modulus up to 1824GPa with the highest W content of 66.5at.%. The film hardness was 13GPa, independent of the W concentration in the as-deposited W-Zr-Si TFMGs. The influence of post-annealing on the microstructure and mechanical properties of TFMGs was studied by a vacuum thermal treatment ranging from 450 to 750C under various holding times. The surface roughness increased with increasing annealing temperature, with the sample annealed at the supercooled liquid region exhibited the lowest surface roughness of 1.14nm. The hardness of TFMGs increased with increasing annealing temperature and longer holding time due to annealing-induced crystallization with a highest hardness of 16.80.5GPa. However, the indentation toughness decreased upon annealing and the lowest value was achieved for the hardest film due to the increasing amount of short range ordered (SRO) clusters.
15 February 2018
Optical properties of Pb1
15 February 2018
Green polymer electrolytes of chitosan doped with erbium triflate
Publication date: 15 February 2018
Source:Journal of Non-Crystalline Solids, Volume 482 Author(s): R. Alves, F. Sentanin, R.C. Sabadini, A. Pawlicka, M.M. Silva Green Solid Polymer Electrolytes (SPEs) containing Er3+ ions have been prepared by solvent casting process. Chitosan was used as host polymer and the trivalent cations, as erbium triflate (Er(CF3SO3)3), have been incorporated into the matrix. The thermogravimetric analysis was used to evaluate the thermal stability of the electrolytes and the minimum onset decomposition temperature was 139C. Morphology analysis have revealed the predominant amorphous character of the analysed samples. Complex Impedance Spectroscopy was used to evaluate the conductivity of the samples as a function of temperature. The most conducting electrolyte had higher amount of glycerol (CS(ErTrif)0.05Gly0.70) and displayed 2.06
15 February 2018
Preparation and characterization of aerogel/expanded perlite composite as building thermal insulation material
Publication date: 15 February 2018
Source:Journal of Non-Crystalline Solids, Volume 482 Author(s): Guanhua Jia, Zhu Li, Peng Liu, Qiangshan Jing Aerogel was a potential substitute for the traditional thermal insulation materials. But aerogel's fragility and high prices have negative effects on the mechanical property and cost of aerogel-based building thermal insulation materials. To solve this problem, a novel thermal insulation composite aerogel/expanded perlite (AEP) was prepared by filling the aerogel into porous structure of expanded perlite (EP). The aerogel in the pores of AEP would be protected by solid skeleton of AEP, and also reduce the thermal conductivity of AEP. The AEP was characterized by X-Ray diffraction, Fourier transformation infrared, digital microscope, scanning electron microscope, N2 adsorption-desorption isotherms and transient hot-wire method. The results reveal that aerogel could be effectively distributed in porous structure of EP and has a positive effect on the pore structure and thermal insulation performance of EP. AEP has typical mesoporous structure and shows chemical stability and hydrophobicity. The mesoporous volumes and BET specific surface areas of AEP were about 100280 times and 50150 times as large as those of EP, respectively. And thermal conductivities of AEP were decreased by 14.731.8% than EP. All results suggested that AEP can be considered as potential building thermal insulation materials due to good thermal insulation performance and lower cost.
15 February 2018
Effect of oxygen flow rate on microstructure properties of SiO2 thin films prepared by ion beam sputtering
Publication date: 15 February 2018
Source:Journal of Non-Crystalline Solids, Volume 482 Author(s): Lishuan Wang, Yugang Jiang, Chenghui Jiang, Huasong Liu, Yiqin Ji, Feng Zhang, Rongwei Fan, Deying Chen Optical constants and micro-structure characteristics of SiO2 films deposited by ion beam sputtering were studied. The samples were prepared on substrates of silicon and silica with different oxygen flow rates ranged from 0sccm to 40sccm with a step of 10sccm. Refractive index of the samples were obtained by spectra inversion technique. It's suggested that the value of refractive index presents first decrease and then increase as the oxygen flow rate larger, and the turning point is about 30sccm both at 0.633
15 February 2018
On the nanoindentation hardness of Cu-Zr-Al/Cu nanolaminates
Publication date: 15 February 2018
Source:Journal of Non-Crystalline Solids, Volume 482 Author(s): Y. Ma, G.J. Peng, H. Chen, W.F. Jiang, T.H. Zhang Nanolaminates consisting of individual amorphous Cu-Zr-Al layers and nanocrystalline Cu layers on Si substrates were prepared by alternatively magnetron sputtering and hardness measurements were conducted upon nanoindentation with a standard Berkovich indenter. Indentation hardness showed a strong size effect in single Cu-Zr-Al film, its decline trend was slower in the nanolaminates with thinner amorphous layers. While experimental hardness was obviously below the expected rule-of-mixture value for all the nanolaminates. Finite element modelling (FEM) analysis was performed in each sample to explore stress distribution beneath indenter. A higher proportion of Cu layers has been involved into plastic region than the nominal value. Besides, interfacial barrier strength was estimated for each sample. The experimental results could be well described by the modified rule of mixture integrated with true ratio of Cu to Cu-Zr-Al in plastic region and the interface strengthen effect.
15 February 2018
Development of magnetic and ductile Fe-Co-Zr-Mo-Cr glassy alloy without metalloid elements
Publication date: 15 February 2018
Source:Journal of Non-Crystalline Solids, Volume 482 Author(s): Chunxiao Xie, Wen Li, Jianying Luo, Yuhui Yang, Sheng Li A new (Fe0.51Co0.37Zr0.12)83Mo17
15 February 2018
Effect of alkali phosphate content on foaming of CRT panel glass using Mn3O4 and carbon as foaming agents
Publication date: 15 February 2018
Source:Journal of Non-Crystalline Solids, Volume 482 Author(s): Martin B.
15 February 2018
Microstructure, thermal, optical and dielectric properties of new glass nanocomposites of SrTiO3 nanoparticles/clusters in tellurite glass matrix
Publication date: 15 February 2018
Source:Journal of Non-Crystalline Solids, Volume 482 Author(s): E.A. Mohamed, M.G. Moustafa, I. Kashif New glass nanocomposites (GNCs) of the nominal compositions [(100-x) TeO2xSrTiO3] with x=5, 10 and 15 (in mol%) were prepared. The glassy phase in the GNCs samples was established by X-ray diffraction (XRD) and Differential thermal analysis (DTA) studies. The SrTiO3 nanoparticles/clusters embedded in tellurite glass matrix for GNCs were identified by transmission electron microscopic (TEM) and confirmed by Fourier transform infrared (FTIR) study. The optical transmission (at x=5) and the electron spin resonance (ESR) studies for the GNCs samples indicated that the presence of Ti3+ ions in tetragonal distorted octahedral sites. The variation of the thermal, density (
15 February 2018
Structure and dielectric properties of Ag2O-SeO2-TeO2 mixed former glasses
Publication date: 15 February 2018
Source:Journal of Non-Crystalline Solids, Volume 482 Author(s): A. Palui, A. Ghosh Structure and dielectric properties of different compositions of Ag2O-SeO2-TeO2 mixed former glasses have been reported in this paper. Amorphous nature of the compositions has been confirmed from X-ray diffraction patterns. Thermal stability of these glasses has been investigated using differential scanning calorimetry and a connection between glass transition temperature and cross-linking density has been established. Fourier transform infrared (FTIR) spectroscopy has been used to investigate the effect of SeO2 on the glass network structure, and the existence of different structural units, such as TeO4, TeO3 and SeO3 2
15 February 2018
Optical and luminescence properties of silicon doped alumino-phosphate
1 February 2018
Lindemann-type criterion on the glass transition temperature of metallic glasses
Publication date: 15 February 2018
Source:Journal of Non-Crystalline Solids, Volume 482 Author(s): K. Zhao, C. He, G.C. Liu, J. Ju, S.H. Lv Previous studies show that there are some similarities between glass transition and melt process for metals. We assume that the glass transition occurs when the amplitude of atomic vibrational motions exceeds a critical fraction of the atomic spacing, and find that the glass transition temperature of metallic glass is proportional to the product of its Young's modulus and molar volume. The finding indicates that the glass transition is associated with the vibrational motions of atoms, and a Lindemann-type criterion holds for the glass transition temperature of metallic glasses.
1 February 2018
Editorial Board
Publication date: 1 February 2018
Source:Journal of Non-Crystalline Solids, Volume 481

1 February 2018
Estimating maximal disorder in amorphous solids
Publication date: 1 February 2018
Source:Journal of Non-Crystalline Solids, Volume 481 Author(s): M.A. Grado-Caffaro, M. Grado-Caffaro We derive a criterion for determining maximum disorder in an amorphous solid. This criterion is based on the so-called sum rule for a given range of optical frequencies in relation to the coefficient of optical absorption in the solid. In addition, as examples, the criterion in question is applied to amorphous IIVI and IIIV semiconductors as well as to amorphous metallic compounds.
1 February 2018
Effect of polyacrylic resin on mechanical properties of granulated blast furnace slag based geopolymer
Publication date: 1 February 2018
Source:Journal of Non-Crystalline Solids, Volume 481 Author(s): Xiao Chen, Guo Rui Zhu, Jie Wang, Qian Chen The mechanical performances of alkali-activated granulated blast furnace slag (GBFS) based geopolymer modified with polyacrylic resin were investigated in this paper. The water-to-binder ratio, alkaline activator content (Na2O wt%) and SiO2/Na2O molar ratio in this experiment maintained at 0.5, 6% and 0.8, respectively. Geopolymer samples were synthesized by alkaline solution and GBFS with incorporating amount of 0.25, 0.5, 0.75, 1.0, 3.0 and 5.0wt% polyacrylic resin. The mechanical properties of samples were measured using compression tests, flexure tests and bending toughness tests. The results show that the compressive and flexural strength were both up to the maximum value while doping 1wt% polyacrylic resin, the ratio of flexural-compressive strength and bending toughness at curing 28days were increased by 36.3% and 104.6% respectively, compared with the control samples. The structural evolutions of specimen after incorporating polyacrylic resin were characterised by FTIR as well as 29Si NMR spectroscopy. It indicated that a new absorption peak namely SiOC bond at wavenumber of about 1180cm
1 February 2018
Structural, thermal and optical properties of phosphate glasses doped with SiO2
Publication date: 1 February 2018
Source:Journal of Non-Crystalline Solids, Volume 481 Author(s): Refka Oueslati-Omrani, Ahmed Hichem Hamzaoui, Radhouane Chtourou, Adel M'nif Glasses with a general formula (0.9-x)NaPO3-xSiO2-0.1ZnO (0
1 February 2018
Fine structure, mechanical characteristics and mid-range order in xZnOyNa2O(1-x-y)SiO2 glasses
Publication date: 1 February 2018
Source:Journal of Non-Crystalline Solids, Volume 481 Author(s): Tatiana Pesina, Lidiya Tikhonova, Marta Kireenko, Alfred Sinani, Alexandre Chmel The differentiation between the behavior of Zn2+ and Na+ cations in silicate network is shaded by the lack of characteristic infrared or Raman bands belonging to the modes involving the zinc- or sodium-oxygen bonds. It was shown in this study that the stepwise substitution of Na2O for ZnO in the xZnOyNa2O(1-x-y)SiO2 glasses with keeping approximately the same SiO2 content causes the high-frequency shift of the Raman-active boson peak (BP) that is the decrease of the correlation length in structural glass heterogeneities. Intercomparison of this trend with variations of the measured structural strength and microhardness of the glasses under consideration afforded ground to suggestion of a possible dual role of Zn2+ ion as either glass-modifier or glass former in specific compositions of zinc-alkali-silicate glasses.
1 February 2018
Crystallization behavior of Ge-Sb-Se glasses in the compositional range for use as molded lenses
Publication date: 1 February 2018
Source:Journal of Non-Crystalline Solids, Volume 481 Author(s): Jun Ho Lee, Jeong Han Yi, Woo Hyung Lee, Bong Je Park, Yong Gyu Choi We have investigated compositional dependences of crystallization events of Ge-Sb-Se glasses across the compositional range appropriate for molded lens applications in the long-wavelength infrared spectrum. The onset temperature of crystallization turned out to feature no significant dependence on compositional changes of the constituent atoms, unlike glass transition temperature, Vickers hardness and thermal expansion coefficient, all of which revealed a much more significant correlation against germanium or selenium content. In an effort to unveil glass-structural attributes to the observed onset temperature of crystallization values, both mean coordination number and average bond energy were taken into consideration: The onset temperature of crystallization values appeared to be linearly proportional to average bond energy, whereas no such a correlation was verified in the case of mean coordination number. We delineated these behaviors, with an emphasis paid to the off-stoichiometry of each glass composition, in terms of network connectivity and chemical bond energy of the glass structure. In addition, crystalline phases precipitated during the bulk crystallization were identified, and the effects of the surface crystallization were analyzed in connection with infrared transmittance and hardness.
1 February 2018
Permanent densification of amorphous zinc oxide under pressure: A first principles study
Publication date: 1 February 2018
Source:Journal of Non-Crystalline Solids, Volume 481 Author(s): Duygu Tahao
1 February 2018
Detailed OMCTS/H2/O2 chemical kinetics mechanism and its application in the fused silica glass synthesis
Publication date: 1 February 2018
Source:Journal of Non-Crystalline Solids, Volume 481 Author(s): Jing Chen, Zeyu Huang, Lili Zheng The application of OMCTS/H2/O2 combustion process for the fused silica glass synthesis can prevent the halide emission compared to the conventional SiCl4/H2/O2 system. Detailed chemical kinetics of OMCTS/H2/O2 is critical for the prediction of flame characteristics, vapor nucleation, particle growth and deposition in the synthesis process. In this work, a detailed OMCTS/H2/O2 mechanism consisting of 55 species and 239 elementary reactions is formulated, which accounts for the oxidation, pyrolysis and hydrolysis of OMCTS, the combustion processes of H2/O2 and low hydrocarbon intermediate species. The dominant reaction pathways at representative thermo-chemical conditions for the fused silica glass synthesis are further analyzed through the directed relation graph method and a reduced mechanism of 24 species and 39 reactions is developed. The fused silica glass synthesis processes with OMCTS/H2/O2 and SiCl4/H2/O2 are then simulated respectively with the proposed mechanisms to reveal the differences in the flame, radicals and SiO2 formation characteristics. It is shown that although the two systems yield similar flame characteristics such as temperature and OH distributions, the SiO2 formation characteristics is different. The OMCTS/H2/O2 system has significant larger SiO2 concentration and a wider spread of SiO2 near the silica glass ingot and consequently a higher SiO2 formation rate. It is also shown that one new peak appears in the SiO distribution between the nozzle and SiO2 peak because the OMCTS pyrolysis process is important and it yields a larger amount of SiO. The effects of hydrogen inflow mass flow rate on the flame and SiO2 formation characteristics in the OMCTS/H2/O2 system are also analyzed.
1 February 2018
Volatile species of technetium and rhenium during waste vitrification
Publication date: 1 February 2018
Source:Journal of Non-Crystalline Solids, Volume 481 Author(s): Dongsang Kim, Albert A. Kruger Volatile loss of technetium (Tc) during vitrification of low-activity wastes is a technical challenge for treating and immobilizing the large volumes of radioactive and hazardous wastes stored at the U.S. Department of Energy's Hanford Site. Various research efforts are being pursued to develop technologies that can be implemented for cost effective management of Tc, including studies to understand the behavior of Tc during vitrification, with the goal of eventually increasing Tc retention in glass. One of these studies has focused on identifying the form or species of Tc and Re (surrogate for Tc) that evolve during the waste-to-glass conversion process. This information is important for understanding the mechanism of Tc volatilization. In this paper, available information collected from the literature is critically evaluated to clarify the volatile species of Tc and Re and, more specifically, whether they volatilize as alkali pertechnetate and perrhenate or as technetium and rhenium oxides after decomposition of alkali pertechnetate and perrhenate. The evaluated data ranged from mass spectrometric identification of species volatilized from pure and binary alkali pertechnetate and perrhenate salts to structural and chemical analyses of volatilized materials during crucible melting and scaled melter processing of simulated wastes.
1 February 2018
Influence of Bi2O3 on the physical and electrical properties of some Boro-Iron glasses
Publication date: 1 February 2018
Source:Journal of Non-Crystalline Solids, Volume 481 Author(s): Hossam M. Gomaa The rapid quenching method was used to prepare some of Bismuth Boro-Iron glasses doped with a constant amount of iron ions. The melting temperature adjusted to be about 100050C. The obtained glasses were characterized by X-ray diffraction (XRD), FTIR and Mossbauer Effect (ME) spectra. Both of XRD and ME showed that all samples of x<15 had formed pure glass phases, while the sample of x=15 exhibited crystalline phase embedded in an amorphous structure. DC activation energy was observed to increase as Bi content increase. Cole-Cole parameters referred to a distribution of the relaxation time. The refractive index as the Bi ion was increased.
1 February 2018
Quasi-static and impact-initiated response of Zr55Ni5Al10Cu30 alloy
Publication date: 1 February 2018
Source:Journal of Non-Crystalline Solids, Volume 481 Author(s): Caimin Huang, Shun Li, Shuxin Bai The Zr55Ni5Al10Cu30 alloy was prepared by copper-mold casting method. The microstructure of the alloy was examined by integrating the X-ray diffraction, scanning electron microscope and electron probe microanalyzer. It was found that the alloy cast in the mold with 3mm in diameter contains amorphous and Cu10Zr7 phases, while the alloys cast in the mold with 6 (D6) and 10mm in diameter consist of Cu10Zr7, CuZr2 crystalline and amorphous phases. The quasi-static experiment result shows that the compressive fracture strength of D6 is up to 1560MPa. Moreover, it was found that the Zr55Ni5Al10Cu30 alloy burned completely in air based on the evolution of bright spark during ballistic impact testing. The obviously reaming effect to impact target indicates that the Zr55Ni5Al10Cu30 alloy has a promising application in reactive material.
1 February 2018
Exploration of gamma radiation shielding features for titanate bismuth borotellurite glasses using relevant software program and Monte Carlo simulation code
Publication date: 1 February 2018
Source:Journal of Non-Crystalline Solids, Volume 481 Author(s): G. Lakshminarayana, Ashok Kumar, M.G. Dong, M.I. Sayyed, Nguyen Viet Long, M.A. Mahdi In this work, gamma radiation shielding parameters for six titanate bismuth borotellurite glasses were investigated. The mass attenuation coefficients (
1 February 2018
The effect of Ag addition on the non-isothermal crystallization kinetics and fragility of Zr56Co28Al16 bulk metallic glass
Publication date: 1 February 2018
Source:Journal of Non-Crystalline Solids, Volume 481 Author(s): Masoud Mohammadi Rahvard, Morteza Tamizifar, Seyed Mohammad Ali Boutorabi The non-isothermal crystallization kinetics and fragility of Zr56Co28Al16 and Zr56Co24Ag4Al16bulk metallic glasses (BMGs) were studied by differential scanning calorimetry (DSC). The X-ray diffraction (XRD), transmission electron microscopy (TEM) and microhardness test were used to investigate the glassy alloys structure. DSC traces exhibited two crystallization processes for both alloys. The activation energies of characteristic temperatures were obtained by Kissinger and Ozawa methods. Also, the heating rate sensitivity of characteristic temperatures was determined. The Ag-bearing Zr-based BMG presented higher activation energies and lower heating rate sensitivity in regard to characteristic temperatures, indicating a higher stabilization of the supercooled liquid, which can be correlated with the existence of strong icosahedral short range order (ISRO) clusters in the structure. In addition, the local Avrami exponents at various heating rates were calculated by the JohnsonMehlAvrami equation. The n value variations for each crystallization process pursued almost similar trends for both alloys with n >2.5, revealing that the transformation kinetics is dominated by a diffusion-controlled three-dimensional growth, as well as an increase in the nucleation rate. Moreover, both BMGs were classified into strong glasses, depending on the fragility index calculated values.
1 February 2018
Synthesis and properties of nanocrystal BiPO4 in diamagnetic PbO-Bi2O3-B2O3 glass
Publication date: 1 February 2018
Source:Journal of Non-Crystalline Solids, Volume 481 Author(s): Qiuling Chen, Yanrong Wang, Hui Wang In this study, we synthesized of BiPO4 nanocrystals in diamagnetic glass (45PbO45Bi2O38B2O32P2O5mol %) by melt quenching technique and studied its influence to glass Faraday rotation. The 9nm irregular BiPO4nanocrystals formed in glass and changed glass structure, spectral and properties through the characterization of X-ray diffraction, field Emission scanning electron microscopy, differential scanning calorimetry, UVVis optical absorption, Vicker's hardness and Verdet constant etc. The BiPO4 induced local plasmon effect and bigger polarization gave glass improvements on optical cutoff wavelength, Faraday rotation and Vicker's hardness which is very attractive to magneto optical glass devices.

Influence of annealing on the tribological properties of Zr-based bulk metallic glass
Publication date: 1 February 2018
Source:Journal of Non-Crystalline Solids, Volume 481 Author(s): Jun Zhao, Meng Gao, Mingxing Ma, Xuefeng Cao, Yongyong He, Weihua Wang, Jianbin Luo Annealing regulation plays an important role in improving the mechanical and dynamic properties of bulk metallic glass (BMG), but the influence of annealing on the tribological properties of Zr-based BMG hasn't been investigated. In this study, we comparably investigated the tribological properties of the Zr-based BMG (Zr61Ti2Cu25Al12) under different annealing degrees. The result shows that the anti-friction property of the BMG weakens with the increase of the annealing degree, but their anti-wear property presents an opposite trend. This study makes a contribution to understanding the relationship between the annealing degree and tribological properties, which means the BMG can be further optimized for the application of tribology by annealing regulation.
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