Journal of Non-crystalline Solids最新文献

英文中文

Redox interaction in redox pair-doped alkali borosilicate melts

IF 3.2 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2024-12-09 DOI: 10.1016/j.jnoncrysol.2024.123352

Inseo Kim , Kiseok Jeon , Kimoon Lee , Kidong Kim

The redox interaction behaviors of two redox pairs (Fe+Ce and Fe+Sn) including a single Fe were investigated in alkali alumino-borosilicate melts. The equilibrium states of the melts at a constant temperature, as well as their oxygen equilibrium pressures was determined by potentiometry. The same melts were subjected to voltammetry in the same equilibrium state to examine the Fe redox potential. The interactions between the Fe and Ce or Sn, as determined by the Fe redox ratio based on real oxygen equilibrium pressures, were checked thermodynamically and explicitly manifested by the standard free energy. By comparison of the foregoing results for the melts with the Fe²⁺ absorbance behavior at Vis-NiR spectra for the glasses, it was recognized that the redox interaction in the glass and melt state showed the same tendencies, supporting the derivation of the interaction from the melt state. Additionally, a comparison of the present melts with the results of a previous study on soda lime silicate melts was briefly discussed in terms of the redox interactions in the melt or glass state and the time required to reach the equilibrium state.

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引用次数: 0

Diffusive dissolution of α-alumina in industrial soda-lime silica glass

IF 3.2 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2024-12-09 DOI: 10.1016/j.jnoncrysol.2024.123351

Fatima T. Yoshizawa , Anne-Céline Garel-Laurin , Ekaterina Burov , Michael J. Toplis

This study advances the understanding of alumina dissolution mechanisms in industrial soda-lime-silica glass. Electron Probe Micro-Analysis (EPMA) revealed diffusion-controlled behavior between 1300 and 1450 ° C, with interface melt compositions varying significantly with temperature. These variations align with thermodynamic predictions. At temperatures

\geq

1400 °C, the interface enters the peraluminous field, while at lower temperatures, it lies in the domain of excess charge-balancing cations. Compositional profiles, including uphill diffusion at

\geq

1400 °C, necessitate a multicomponent diffusion matrix approach. Two primary exchange mechanisms are identified: the first involves alumina and charge-balancing cations (mainly Mg+Ca), and the second involves silica and charge-balanced alumina. However, alumina diffusivity can be approximated using an effective binary diffusion coefficient (EBDC), which correlates with the viscosity of the interface melt, even when a viscosity maximum is present. These results emphasize the importance of multicomponent approaches to understanding mineral dissolution and diffusion, particularly in peraluminous systems.

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引用次数: 0

Ga incorporation into calcium silicate sol–gel bioactive glasses: Effect of Ga on glass structure and ion release behavior

IF 3.2 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2024-12-04 DOI: 10.1016/j.jnoncrysol.2024.123350

Takuto Hashimi , Masaya Inuzuka , Koji Yazawa , Julian R. Jones , Akiko Obata , Toshihiro Kasuga

SiO₂–CaO-based sol–gel glasses are well known bioactive materials; however, there remains a concern about the rapid pH increase in their surroundings after implantation in the body due to the burst release of calcium ions (Ca²⁺) from the glasses. In this study, we incorporated gallium oxide, which is an intermediate oxide, into SiO₂–CaO sol–gel glasses to evaluate its effect on the glass structure and ion release behavior. The release of Ca²⁺ from the glasses at the initial stage of immersion in a buffer solution was suppressed by the incorporation of Ga in a dose-dependent manner. Ga was found to be primarily in tetrahedral coordination in the glasses. Thus, Ga served as a network former in the silicate network, forming a tetrahedral coordination unit and a charge balanced by Ca²⁺ ions. The viability of fibroblast-like cells was significantly higher for Ga-incorporated glass compared to nonincorporated glass.

引用次数: 0

Crystallization of CoWB ternary boride in nickel-based metallic glass 镍基金属玻璃中cob三元硼化物的结晶

IF 3.2 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2024-11-30 DOI: 10.1016/j.jnoncrysol.2024.123343

Ziya Ozgur Yazici , Aytekin Hitit , Hakan Sahin

The crystallization kinetics of CoWB ternary boride were investigated through non-isothermal differential scanning calorimetry experiments, using a Ni-based metallic glass precursor as the starting material. The effects of isothermal heat treatment temperature on the phase evolutions were also systematically studied. The results showed that the melt crystallization and glass crystallization behaviors of the alloy differ from each other. The continuous heating transformation diagram plotted from non-isothermal analyses is consistent with the results of isothermal heat treatments. A broad ternary boride precipitation zone was demonstrated, involving the gradual precipitation of CoWB crystals. Avrami exponent values for the early crystallization stage showed that the crystallization mechanism of CoWB is governed by the interface-controlled three-dimensional growth mechanism, and nucleation rate is high. As the crystallization progresses, a diffusion-controlled growth occurs and the nucleation rate decreases. This study offers insights into the heat treatment of CoWB-reinforced nickel matrix nanocomposites, benefiting future research and industrial production processes.

以镍基金属玻璃前驱体为原料，采用非等温差示扫描量热法研究了cob三元硼化物的结晶动力学。系统地研究了等温热处理温度对相演变的影响。结果表明，合金的熔融结晶和玻璃结晶行为不同。由非等温分析绘制的连续加热转变图与等温热处理的结果一致。广泛的三元硼化物析出区，包括逐渐析出的cob晶体。早期结晶阶段的Avrami指数值表明，cob的结晶机制受界面控制的三维生长机制支配，成核速率高。随着结晶的进行，发生扩散控制生长，成核速率降低。该研究为cob增强镍基纳米复合材料的热处理提供了新的思路，有利于未来的研究和工业生产过程。

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引用次数: 0

Formation and annihilation of point defects in SiO2 glass during neutron irradiation and annealing 中子辐照和退火过程中SiO2玻璃点缺陷的形成和湮灭

IF 3.2 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2024-11-30 DOI: 10.1016/j.jnoncrysol.2024.123342

Yu-Wei You , Yuqing Wei , Jinwei Xuan , Qi Zhu , Xinhua Li , Kui Hou , D. Yao , Li Wang , Dongdong Li

We perform systematic molecular dynamics (MD) simulations to explore the evolution of point defects in SiO₂ glass during neutron irradiation and annealing. Our results suggest that the numbers of point-defects nonbridging oxygens (NBO) and E′-type center increase significantly within 0.2 ps, and then decrease gradually over 0.2 ps. The numbers of point-defects oxygen deficient centers (ODC), peroxy linkages (POL) and peroxy radicals (POR) present gradual increase tendency within 0.2 ps. The number of these point defects is in direct proportion to the kinetic energies of the primary knock-on atoms. During annealing, we consider the situations that SiO₂ glass is irradiated by neutron at 1000 K, 1500 K and 2000 K. It is found that point defects disappear quickly during annealing and it qualitatively agrees with the literature results, where E’, ODC and NBOs in irradiated silica glasses are bleached when annealing at temperatures exceeding 550 °C. Finally, we consider the vibrational density of states of SiO₂, and find that the low-frequency (0.1∼0.5 THz) vibrational density of states is greatly enhanced.

本文采用系统的分子动力学（MD）模拟研究了SiO2玻璃在中子辐照和退火过程中点缺陷的演化。结果表明：点缺陷非桥氧（NBO）和E′型中心的数量在0.2 ps内显著增加，在0.2 ps后逐渐减少，点缺陷缺氧中心（ODC）、过氧键（POL）和过氧自由基（POR）的数量在0.2 ps内呈逐渐增加的趋势，这些点缺陷的数量与初敲原子的动能成正比。在退火过程中，我们考虑了SiO2玻璃在1000 K、1500 K和2000 K的中子辐照情况。发现点缺陷在退火过程中迅速消失，定性结果与文献结果一致，其中辐照石英玻璃中的E′、ODC和NBOs在超过550℃退火时发生脱色。最后，我们考虑了SiO2的态的振动密度，发现低频（0.1 ~ 0.5 THz）态的振动密度大大增强。

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引用次数: 0

Tantalum-lanthanum mixing effect on structural and mechanical properties of aluminate glasses 钽镧混合对铝酸盐玻璃结构和力学性能的影响

IF 3.2 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2024-11-30 DOI: 10.1016/j.jnoncrysol.2024.123340

Zijuan Du , Zhitao Shan , Ang Qiao , Haizheng Tao , Yuanzheng Yue

Aluminate glasses are known for their superior mechanical and optical properties. Here, we investigated the tantalum (Ta)-lanthanum (La) mixing effect on structural and mechanical properties of these glasses. Using the aerodynamic levitation and laser melting technique, we prepared a series of aluminate glasses with the molar composition 54Al₂O₃·(46-x)La₂O₃·xTa₂O₅, where x = 0.0, 9.2, 18.4, 23.0, 32.2, 36.8, and 46.0. The structural, thermal, and mechanical analyses revealed that substituting Ta for La strongly impacted the local Al environment in the glasses, thereby affecting their glass transition temperature and mechanical properties. The Vickers microhardness (H_V) varied non-monotonically with the molar ratio R (defined as Ta/(Ta+La) = x/46), reaching a maximum H_V value of 8.59 GPa at R = 0.8. This trend was explained in terms of both the average bond energy and the bond number density. Moreover, the crack initiation resistance of the studied glasses increased as R rose. This work aids in the design of oxide glasses with high crack resistance and hardness.

铝酸盐玻璃以其优异的机械和光学性能而闻名。在这里，我们研究了钽(Ta)-镧（La）混合对这些玻璃的结构和力学性能的影响。采用空气动力学悬浮和激光熔化技术制备了摩尔成分为54Al2O3·（46-x）La2O3·xTa2O5的铝酸盐玻璃，其中x = 0.0、9.2、18.4、23.0、32.2、36.8和46.0。结构、热、力学分析表明，Ta取代La对玻璃中的局部Al环境产生强烈影响，从而影响玻璃的玻璃化转变温度和力学性能。维氏显微硬度（HV）随摩尔比R（定义为Ta/(Ta+La) = x/46）呈非单调变化，在R = 0.8时达到最大值8.59 GPa。这种趋势可以用平均键能和键数密度来解释。随着R的增大，玻璃的抗裂能力也随之增大。这项工作有助于设计具有高抗裂性和高硬度的氧化玻璃。

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引用次数: 0

Kinetics of thermal and photoinduced diffusion of Ag into thin layers of chalcogenide glasses 银在硫系玻璃薄层中的热光诱导扩散动力学

IF 3.2 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2024-11-29 DOI: 10.1016/j.jnoncrysol.2024.123333

Ivan Indutnyi, Sergii Mamykin, Viktor Mynko, Mykola Sopinskyy, Volodymyr Romanyuk, Andrii Korchovyi

This study examines the kinetics of thermal diffusion of silver in Ag-GeSe₂ and Ag- As₁₀Ge₃₀S₆₀ thin film structures during prolonged storage in the dark at room temperature, as well as the effects of plasmon-enhanced photostimulated diffusion of silver into As₁₀Ge₃₀S₆₀ films. Ag diffraction gratings with a period of 519 nm were used to excite surface plasmon-polaritons (SPP) at the silver-chalcogenide glass interface. It was found that the thermal diffusion coefficient of silver into GeSe₂ is significantly higher than into As₁₀Ge₃₀S₆₀. For Ag– As₁₀Ge₃₀S₆₀, photostimulated silver diffusion coefficients were measured with and without SPP excitation. SPP excitation triples the photostimulated Ag flux into As₁₀Ge₃₀S₆₀. Although photosensitivity decreases over time, the plasmon-stimulated increase in Ag flux remains stable. Additionally, As₁₀Ge₃₀S₆₀ thermally doped with silver shows much higher optical absorption at the probing wavelength compared to the photodoped layer with the same silver concentration. Possible mechanisms of these layers formation are discussed.

本研究考察了银在Ag- gese2和Ag- As10Ge30S60薄膜结构在室温下长时间黑暗储存过程中的热扩散动力学，以及等离子体增强光刺激下银在As10Ge30S60薄膜中的扩散效应。利用周期为519 nm的银衍射光栅在银硫系玻璃界面激发表面等离子体极化子（SPP）。结果表明，银在GeSe2中的热扩散系数明显高于在As10Ge30S60中的热扩散系数。对于Ag - As10Ge30S60，在SPP激励和不SPP激励下测量了光刺激银的扩散系数。SPP激发使As10Ge30S60的光激发银通量增加了三倍。虽然光敏性随时间而降低，但等离子体激发的银通量增加保持稳定。此外，与具有相同银浓度的光掺杂层相比，热掺杂的As10Ge30S60在探测波长处表现出更高的光吸收。讨论了这些层形成的可能机制。

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引用次数: 0

Corrigendum to “The eminence of copper ions on optical, electrical properties and morphology of B2O3-Bi2O3-Al2O3-MgO glasses” [Journal of Non-Crystalline Solids, 564 (2021) 120884] “铜离子对B2O3-Bi2O3-Al2O3-MgO玻璃的光学、电学性能和形貌的影响”的更正[j] .非结晶固体学报，564(2021)120884。

IF 3.2 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2024-11-28 DOI: 10.1016/j.jnoncrysol.2024.123331

G. Krishn Priya , S. Yusub , A. Ramesh Babu , N. Sree Ram , K. Rama Krishna , V. Aruna

引用次数: 0

Thermodynamic and kinetic investigation on crystallization of photosensitive glass-ceramics via molecular dynamics 光敏微晶玻璃结晶的分子动力学和热力学研究

IF 3.2 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2024-11-28 DOI: 10.1016/j.jnoncrysol.2024.123332

Weirong Huo , Guoqing Wang , Tianlai Yu , Bin Hu , Gang Ye , Bin Lin

Photosensitive glass-ceramics serves as a crucial support for advancement of integrated circuits in post Moore era. Nevertheless, current research lacks an in-depth discussion of crystallization and nucleation mechanisms induced by nucleating agents. Here, we select new AgSbO₃ nucleating agents and conduct a detailed thermodynamic and kinetic investigation of its promoting effects in Li₂SiO₃ using first-principles molecular dynamics. Statistical results from pair distribution functions indicate that in the presence of AgSbO₃ nucleating agents in Li₂SiO₃, the structure tends to exhibit a more crystalline distribution. The diffusion coefficient of Li ions in AgSbO₃–Li₂SiO₃ is 0.47 × 10^–6 cm²/s, which is one-tenth of the value of Li ions in amorphous Li₂SiO₃. Additionally, a molecular dynamics approach was employed to screen and analyze motion trajectories of 16 lithium ions. All of these data suggest that AgSbO₃ nucleating agents can accelerate crystallization of Li₂SiO₃. This work provides an atomic-scale discussion of nucleating agents' effects in photosensitive glass-ceramics.

光敏微晶玻璃是后摩尔时代集成电路发展的重要支撑。然而，目前的研究缺乏对成核剂诱导结晶和成核机制的深入探讨。在此，我们选择了新的AgSbO3成核剂，并利用第一性原理分子动力学对其在Li2SiO3中的促进作用进行了详细的热力学和动力学研究。对分布函数的统计结果表明，当AgSbO3成核剂存在于Li2SiO3中时，结构倾向于呈现更结晶的分布。锂离子在AgSbO3-Li2SiO3中的扩散系数为0.47 × 10-6 cm2/s，为非晶Li2SiO3中锂离子的十分之一。此外，采用分子动力学方法对16种锂离子的运动轨迹进行了筛选和分析。这些数据表明，AgSbO3成核剂可以加速Li2SiO3的结晶。本文从原子尺度上讨论了成核剂在光敏玻璃陶瓷中的作用。

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引用次数: 0

On the formation of metallic glass 关于金属玻璃的形成

IF 3.2 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2024-11-28 DOI: 10.1016/j.jnoncrysol.2024.123329

Jian Guo Wang

The high cooling rate needed for preparing the metallic glass (MG) makes the nonequilibrium nature of glass formation more prominent and requires a better quenching technique than ever before. Here, the cooling process is formulated analytically to reveal the determinants for cooling rate, and the crystallization time with consideration of phase diagram is calculated. Based on the reduced glass transition temperature, T_rg, for measuring the glass-forming ability (GFA), a more reasonable ΔT_rg is presented. Glass transition, especially in ever glass whose ground state is of glass, is discussed in terms of thermodynamics for phase transition. A fundamental law concerning the changing rate of entropy in a closed system is proposed to underlie the physics for glass formation. These results may help understand the glass formation principally and develop new and robust MGs technically.

制备金属玻璃（MG）所需的高冷却速率使得玻璃形成的非平衡性更加突出，并且需要比以往更好的淬火技术。本文对冷却过程进行了解析，揭示了冷却速度的决定因素，并计算了考虑相图的结晶时间。通过降低玻璃化转变温度Trg来测量玻璃化形成能力（GFA），提出了更合理的ΔTrg。从相变热力学的角度讨论了玻璃化转变，特别是基态为玻璃的玻璃化转变。提出了一个关于封闭系统中熵变化率的基本定律，作为玻璃形成物理学的基础。这些结果可能有助于从根本上了解玻璃的形成，并在技术上开发新的、坚固的mggs。

引用次数: 0

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