Journal of Non-crystalline Solids最新文献

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Controlling the valence change of sulfur in glass during S K-edge XAFS measurements by conductive coating 利用导电涂层控制k边XAFS测量过程中玻璃中硫的价态变化
IF 3.2 3区 材料科学
Journal of Non-crystalline Solids Pub Date : 2025-07-05 DOI: 10.1016/j.jnoncrysol.2025.123694
Yoshitaka Saijo , Saki Ozawa , Tatsuya Miyajima , Shinta Watanabe , Hiroyuki Hijiya , Kakeru Ninomiya , Maiko Nishibori
{"title":"Controlling the valence change of sulfur in glass during S K-edge XAFS measurements by conductive coating","authors":"Yoshitaka Saijo ,&nbsp;Saki Ozawa ,&nbsp;Tatsuya Miyajima ,&nbsp;Shinta Watanabe ,&nbsp;Hiroyuki Hijiya ,&nbsp;Kakeru Ninomiya ,&nbsp;Maiko Nishibori","doi":"10.1016/j.jnoncrysol.2025.123694","DOIUrl":"10.1016/j.jnoncrysol.2025.123694","url":null,"abstract":"<div><div>Sulfur is an important multivalent element for tuning glass properties. Analyzing the valence state of sulfur in glass is essential as it significantly influences the glass characteristics. X-ray absorption fine structure (XAFS) is a powerful technique for elucidating both the valence state and structural attributes of sulfur. However, alterations in the valence of sulfur during XAFS measurements present significant challenges. This study explores a method to control valence changes during S K-edge XAFS measurements. By applying a carbon coating to the surface of glass samples to prevent charging, spectra that accurately reflect the original redox state of sulfur were obtained, which was confirmed by the following: (1) The XAFS spectra of carbon-coated glass samples showed reasonable peak intensities for S<sup>2−</sup> and S<sup>6+</sup> compared to corresponding standard samples; (2) consistent spectra were obtained from repeated measurements at the same location; and (3) the peak intensity ratio of S<sup>2−</sup> to the sum of S<sup>2−</sup> and S<sup>6+</sup> correlated well with the sulfur redox state determined by wavelength-dispersive X-ray fluorescence (WD-XRF). The extended measurement duration permitted by this technique also enabled the detection of small peaks at 2467 and 2469 eV in an amber glass sample, which are related to sulfide-proton (S<sup>2−</sup>–H<sup>+</sup>) and sulfide-ferric (S<sup>2−</sup>–Fe<sup>3+</sup>) bonds, respectively. Utilizing this method in conjunction with synchrotron light sources of increased brightness could further enhance the detection of such minor peaks and provide deeper insight into the structural characteristics of sulfur in glass and their influence on glass properties.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"666 ","pages":"Article 123694"},"PeriodicalIF":3.2,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144556853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Deciphering vanadium redox and structure in aluminosilicate glass: A spectroscopic study 破译铝硅酸盐玻璃中钒的氧化还原和结构:光谱研究
IF 3.2 3区 材料科学
Journal of Non-crystalline Solids Pub Date : 2025-07-03 DOI: 10.1016/j.jnoncrysol.2025.123689
Adrien Donatini , Peggy Georges , Tiphaine Fevre , Laurent Cormier , Daniel R. Neuville
{"title":"Deciphering vanadium redox and structure in aluminosilicate glass: A spectroscopic study","authors":"Adrien Donatini ,&nbsp;Peggy Georges ,&nbsp;Tiphaine Fevre ,&nbsp;Laurent Cormier ,&nbsp;Daniel R. Neuville","doi":"10.1016/j.jnoncrysol.2025.123689","DOIUrl":"10.1016/j.jnoncrysol.2025.123689","url":null,"abstract":"<div><div>Vanadium oxide can be used to color silicate glasses and to influence their crystallization behavior. However, vanadium’s role in glass is strongly dependent on its redox state and local structure, both of which are poorly understood. In this study, XANES, Raman and optical absorption spectroscopy were used to determine vanadium redox state in an aluminosilicate glass. Raman spectroscopy of oxidized and reduced samples allowed for the attribution of the Raman signatures of vanadium ions. The species present in the glass synthetized under air are [V<sup>5+</sup>O<sub>5</sub>]<sup>5-</sup>, [V<sup>5+</sup>O<sub>4</sub>]<sup>3-</sup> and [V<sup>4+</sup>O<sub>5</sub>]<sup>6-</sup>. When the glass is synthetized under reducing conditions, the redox state is a mixture of V<sup>3+</sup> and [V<sup>4+</sup>O<sub>5</sub>]<sup>6-</sup>. Our results show that optical absorption spectroscopy is well-suited to monitor changes in V<sup>4+</sup> concentration, while Raman spectroscopy allows the monitoring of V<sup>5+</sup>. Vanadium reduction mechanism was investigated by performing Raman and optical absorption spectroscopy measurements along a reduction profile. Our results show that V<sup>3+</sup>, V<sup>4+</sup> and V<sup>5+</sup> coexist over a range of oxygen fugacity. This leads to sample color not being linear with oxidation state as the coexistence of V<sup>3+</sup> and V<sup>5+</sup> might be responsible for the rise of another optical absorption that darkens the glass.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"666 ","pages":"Article 123689"},"PeriodicalIF":3.2,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144549520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Prediction of glass refractive index based on a multi-algorithm stacked integration model 基于多算法叠加积分模型的玻璃折射率预测
IF 3.2 3区 材料科学
Journal of Non-crystalline Solids Pub Date : 2025-07-02 DOI: 10.1016/j.jnoncrysol.2025.123681
Jiateng Li , Jun Shen , Zhihao Dong , Feifan Li , Mingxuan Zou , Shaoyun Yin
{"title":"Prediction of glass refractive index based on a multi-algorithm stacked integration model","authors":"Jiateng Li ,&nbsp;Jun Shen ,&nbsp;Zhihao Dong ,&nbsp;Feifan Li ,&nbsp;Mingxuan Zou ,&nbsp;Shaoyun Yin","doi":"10.1016/j.jnoncrysol.2025.123681","DOIUrl":"10.1016/j.jnoncrysol.2025.123681","url":null,"abstract":"<div><div>Machine learning (ML) has been recognized as a viable method to accelerate the design of materials with targeted properties. A number of composition–property relationships for modeling oxide glasses with machine learning have been recently reported, including density, modulus of elasticity, glass transition temperature, and refractive index. As we know, most current models for predicting the refractive index of glass compositions usually use a single machine learning algorithm. But a single machine learning model may not fully capture all complex relationships in the data, resulting in model bias. Herein, we use a multi-algorithm stacked integration approach—namely stacking different algorithms—to rectify model bias caused by a single algorithm. We provide insight into a new strategy of applying stacked integration models in oxide glass prediction. SPearman’s coefficients are used to discover relationships between features and target variables, combined with SHAP additive interpretation and analysis. In this paper, a stacked integration model is proposed to predict the refractive index of oxides, and RMSE is reduced by 3.6%–38% compared to a single model. The potential of stacked integration models to predict refractive index is proven through our work.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"666 ","pages":"Article 123681"},"PeriodicalIF":3.2,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144522659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A review on viscosity and structure of high-temperature borosilicate melts 高温硼硅酸盐熔体的粘度和结构研究进展
IF 3.2 3区 材料科学
Journal of Non-crystalline Solids Pub Date : 2025-07-02 DOI: 10.1016/j.jnoncrysol.2025.123683
Lei Cui , Peiyuan Ni , Wei Lv , Ying Li
{"title":"A review on viscosity and structure of high-temperature borosilicate melts","authors":"Lei Cui ,&nbsp;Peiyuan Ni ,&nbsp;Wei Lv ,&nbsp;Ying Li","doi":"10.1016/j.jnoncrysol.2025.123683","DOIUrl":"10.1016/j.jnoncrysol.2025.123683","url":null,"abstract":"<div><div>Borosilicate melts with optimal viscosity are critical for the production of high-performance glass, serving as functional materials in metallurgy and metal hot-working processes. The viscosity of these melts is intrinsically linked to their structure, which is governed by chemical composition and temperature. Consequently, the interplay between viscosity and structure in borosilicate melts has attracted significant research interest. This study reviews commonly employed methods to analyze the structure and viscosity of borosilicate melts, focusing on representative studies from 1964 to 2025 that investigate the effects of various oxide components. The addition of Na<sub>2</sub>O, K<sub>2</sub>O, Li<sub>2</sub>O, CaO, BaO, CaF<sub>2</sub>, and CeO<sub>2</sub> disrupts the melt network and decreases viscosity, whereas the impacts of MgO, Al<sub>2</sub>O<sub>3</sub>, TiO<sub>2</sub>, La<sub>2</sub>O<sub>3</sub>, and Y<sub>2</sub>O<sub>3</sub> remain less well understood. The observed discrepancies exist between viscosity measurements and theoretical predictions from the Arrhenius and Vogel-Fulcher-Tammann (VFT) models. This is particularly true for multicomponent oxide melts. However, these established models are still widely used in practical applications, due to the lack of alternative models with better performance across various material systems. Developing precise viscosity models may require optimizing critical parameters, integrating structural data, and employing machine learning techniques. Moreover, molecular dynamics (MD) simulations often yield viscosity predictions with substantial errors when compared to experimental results, underscoring the necessity for improved potential functions. This highlights the importance of uncovering the microscopic mechanisms linking MD structural parameters to melt viscosity.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"666 ","pages":"Article 123683"},"PeriodicalIF":3.2,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144535060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of Nb on thermal stability of Ni-Co-W-B metallic glasses: A kinetic study Nb对Ni-Co-W-B金属玻璃热稳定性影响的动力学研究
IF 3.2 3区 材料科学
Journal of Non-crystalline Solids Pub Date : 2025-07-01 DOI: 10.1016/j.jnoncrysol.2025.123690
Ziya Ozgur Yazici , Enes Ersöz , Aytekin Hitit , Hakan Sahin
{"title":"Effect of Nb on thermal stability of Ni-Co-W-B metallic glasses: A kinetic study","authors":"Ziya Ozgur Yazici ,&nbsp;Enes Ersöz ,&nbsp;Aytekin Hitit ,&nbsp;Hakan Sahin","doi":"10.1016/j.jnoncrysol.2025.123690","DOIUrl":"10.1016/j.jnoncrysol.2025.123690","url":null,"abstract":"<div><div>In this study, the effect of Nb addition on the continuous heating diagram of the Ni-Co-W-B metallic glass alloy system was investigated, and the improvement in glass-forming ability and thermal stability was demonstrated. Based on differential scanning calorimetry (DSC) analyses performed under non-isothermal conditions, a theoretical continuous heating diagram was constructed using the well-known Kissinger kinetic equation. Furthermore, the boundary line of the transition from the amorphous to the crystalline phase was validated through isothermal heat treatments. The findings indicate that modifying the refractory element content by incorporating 6 at. % Nb into the alloy composition improves thermal stability at higher temperatures. The XRD results also demonstrate that the addition of Nb enhances the alloy's glass-forming ability threefold and increases the critical casting thickness from 0.5 mm to 1.5 mm. The local activation energy values calculated for different crystallization fractions indicate that the activation energies required for any given crystallization fraction in the Ni<sub>32.75</sub>Co<sub>22.55</sub>W<sub>23.7</sub>B<sub>15</sub>Nb<sub>6</sub> alloy are higher than those in Ni<sub>35.116</sub>Co<sub>24.184</sub>W<sub>23.7</sub>B<sub>17</sub> the alloy. Furthermore, the primary crystallization phase boundary line in the continuous heating transformation diagram shifts to both higher temperatures and longer times. These results highlight the role of Nb addition in retarding the crystallization in the Ni-Co-W-B alloy system.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"666 ","pages":"Article 123690"},"PeriodicalIF":3.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Corrigendum to “Sintering of different silica aerogels” [Journal of Non-Crystalline Solids 646 (2024) 123245] “烧结不同的二氧化硅气凝胶”的勘误[非结晶固体杂志646 (2024)123245]
IF 3.2 3区 材料科学
Journal of Non-crystalline Solids Pub Date : 2025-06-30 DOI: 10.1016/j.jnoncrysol.2025.123685
Mihail P. Petkov
{"title":"Corrigendum to “Sintering of different silica aerogels” [Journal of Non-Crystalline Solids 646 (2024) 123245]","authors":"Mihail P. Petkov","doi":"10.1016/j.jnoncrysol.2025.123685","DOIUrl":"10.1016/j.jnoncrysol.2025.123685","url":null,"abstract":"","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"666 ","pages":"Article 123685"},"PeriodicalIF":3.2,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Correlation study between network structure and fluidity of high-BaO aluminosilicate melt: MD simulation and Raman spectroscopy 高bao铝硅酸盐熔体网络结构与流动性的相关性研究:MD模拟和拉曼光谱
IF 3.2 3区 材料科学
Journal of Non-crystalline Solids Pub Date : 2025-06-27 DOI: 10.1016/j.jnoncrysol.2025.123686
Wenguo Liu , Ruisong Tan , Haibin Zuo , Jingsong Wang , Qingguo Xue
{"title":"Correlation study between network structure and fluidity of high-BaO aluminosilicate melt: MD simulation and Raman spectroscopy","authors":"Wenguo Liu ,&nbsp;Ruisong Tan ,&nbsp;Haibin Zuo ,&nbsp;Jingsong Wang ,&nbsp;Qingguo Xue","doi":"10.1016/j.jnoncrysol.2025.123686","DOIUrl":"10.1016/j.jnoncrysol.2025.123686","url":null,"abstract":"<div><div>The BaO-bearing aluminosilicate melt plays a remarkable role in the preparation of glass-ceramics and molten iron production from blast furnace (BF). In this paper, the correlation study between network structure and fluidity of high-BaO aluminosilicate melt was investigated by molecular dynamics (MD) simulation and Raman spectroscopy, aiming to clarify the influence of high BaO content in the low-basicity slag melt. The results indicated that the viscosity decreased with an increase in BaO content from 0 to 20wt%, indicating that the depolymerization effect of O<sup>2−</sup> provided by BaO was larger than the polymerization effect of Ba<sup>2+</sup> caused by its charge compensation on [AlO<sub>4</sub>]. Moreover, considering the mole concentration of BaO and Al<sub>2</sub>O<sub>3</sub>, a continuous increase of BaO would cause some excess Ba<sup>2+</sup> ions to behave as network modifier instead of charge compensator, further reducing the degree of polymerization. MD simulation revealed that Si<sup>4+</sup> formed four coordinated [SiO<sub>4</sub>], and Al<sup>3+</sup> could form four coordinated [AlO<sub>4</sub>] and higher coordinated [AlO<sub>5</sub>] and [AlO<sub>6</sub>]. The content of free oxygen (O<sup>2−</sup>) and tri-clusters oxygen (O<sup>t</sup>) was very low. The concentration of non-bridging oxygen (O<sup>−</sup>) increased significantly, whereas that of bridging oxygen decreased. Moreover, the macromolecular Si-based (<span><math><msubsup><mi>Q</mi><mrow><mi>S</mi><mi>i</mi></mrow><mi>n</mi></msubsup></math></span>) and Al-based (<span><math><msubsup><mi>Q</mi><mrow><mi>A</mi><mi>l</mi></mrow><mi>n</mi></msubsup></math></span>) units were broken down to generate more small molecular structure. Raman spectroscopy analysis also showed the similar depolymerization impact on Si-based structure, which indicated that the increase of BaO cut off the bridging oxygen connection between structural units and depolymerized the complex network structure of the melt.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"666 ","pages":"Article 123686"},"PeriodicalIF":3.2,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144502682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Kinetic aspects of the liquid-to-glass transition for lead and borate glasses 铅和硼酸盐玻璃从液体到玻璃转变的动力学方面
IF 3.2 3区 材料科学
Journal of Non-crystalline Solids Pub Date : 2025-06-25 DOI: 10.1016/j.jnoncrysol.2025.123684
Alexey A. Mashanov , Michael I. Ojovan , Migmar V. Darmaev
{"title":"Kinetic aspects of the liquid-to-glass transition for lead and borate glasses","authors":"Alexey A. Mashanov ,&nbsp;Michael I. Ojovan ,&nbsp;Migmar V. Darmaev","doi":"10.1016/j.jnoncrysol.2025.123684","DOIUrl":"10.1016/j.jnoncrysol.2025.123684","url":null,"abstract":"<div><div>We have examined the temperature dependence of the viscosity of lead and boron containing binary oxide glasses in the context of transition from the liquid to the vitreous state, including analysis of kinetic criterion of glass transition. For the studied glasses, it was established that the proportion of the fluctuation volume at Tg changes within a small range <em>f<sub>g</sub></em> ≈ 0.01 - 0.03 and depends weakly on the composition of the glasses. For glasses of the PbO-SiO<sub>2</sub>, PbO-GeO<sub>2</sub>, B<sub>2</sub>O<sub>3</sub>-Bi<sub>2</sub>O<sub>3</sub>, B<sub>2</sub>O<sub>3</sub>-Li<sub>2</sub>O, B<sub>2</sub>O<sub>3</sub>-BaO, B<sub>2</sub>O<sub>3</sub>-Na<sub>2</sub>O systems, both the temperature range determining the glass transition and the structural relaxation time were calculated. The calculation of these parameters near the glass transition temperature of the glasses was performed using the Williams-Landel-Ferry equation. For the specified glasses, the value of the temperature interval was <em>δT<sub>g</sub></em> = 9 – 17 K. It was found that for PbO-SiO<sub>2</sub> glass the dependence of <em>δT<sub>g</sub></em> on <em>T<sub>g</sub></em> is linear in the glass transition region. For PbO-GeO<sub>2</sub> and borate glasses an approximate linear correlation between <em>δT<sub>g</sub></em> and <em>T<sub>g</sub></em> is observed.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"666 ","pages":"Article 123684"},"PeriodicalIF":3.2,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144471389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
High-performance Al2O3-SiO2 aerogel/mullite fibre composites with exceptional thermal stability and ultralow thermal conductivity using dual-silicon-source strategy combined with silica sol deposition modification 高性能Al2O3-SiO2气凝胶/莫来石纤维复合材料具有优异的热稳定性和超低导热性,采用双硅源策略结合硅溶胶沉积改性
IF 3.2 3区 材料科学
Journal of Non-crystalline Solids Pub Date : 2025-06-25 DOI: 10.1016/j.jnoncrysol.2025.123680
Chuanqing Sun , Zhanfeng Li , Mengmeng Wang , Honghua Liu , Kui Ma , Yang Wang , Ruixiang Liu , Futian Liu
{"title":"High-performance Al2O3-SiO2 aerogel/mullite fibre composites with exceptional thermal stability and ultralow thermal conductivity using dual-silicon-source strategy combined with silica sol deposition modification","authors":"Chuanqing Sun ,&nbsp;Zhanfeng Li ,&nbsp;Mengmeng Wang ,&nbsp;Honghua Liu ,&nbsp;Kui Ma ,&nbsp;Yang Wang ,&nbsp;Ruixiang Liu ,&nbsp;Futian Liu","doi":"10.1016/j.jnoncrysol.2025.123680","DOIUrl":"10.1016/j.jnoncrysol.2025.123680","url":null,"abstract":"<div><div>Driven by the urgent demand for lightweight and high-efficiency thermal insulation materials in aerospace and high-temperature industrial equipment, our study has further improved the temperature resistance and insulation properties of traditional aluminium-silicon matrix composites. We proposed an innovative dual-silicon-source system utilizing tetraethyl orthosilicate (TEOS) and large-particle silica sol (SS, <em>d</em> = 20 nm). Through a sol-gel method integrated with silica sol aging deposition, high-specific-surface-area Al₂O₃-SiO₂ aerogels (SS-ASA) and the mullite fibre-reinforced composites (SS-ASA/MF) were successfully fabricated. The dual-silicon-source strategy suppressed high-temperature creep flow by modulating gel network coarsening, while silica sol aging induced Al-O-Si bond reconfiguration, promoting in situ mullite phase nucleation. Remarkably, SS-ASA retained a high specific surface area of 143 m²/g even after thermal treatment at 1200 °C. When composited with mullite fibre mats, SS-ASA/MF exhibited outstanding integrated performance: under a 1000 °C closed heat source for 20 min, the cold-side temperature remained at 98.96 °C, with a thermal conductivity as low as 0.071 W·m<sup>-</sup>¹·K<sup>-</sup>¹ at 1000 °C. Notably, the composite showed no dimensional shrinkage after annealing at 1200 °C for 2 h, and only 1.5 % in the thickness direction after heat treatment at 1300 °C for 2 h. This work establishes a novel approach for optimizing Al₂O₃-SiO₂ aerogels and fibre-reinforced composites, demonstrating significant application potential in spacecraft thermal protection systems and high-temperature industrial kilns.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"666 ","pages":"Article 123680"},"PeriodicalIF":3.2,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144471390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Co-relationship between bioactivity and mechanical properties on addition of ZrO2 in borophosphate glasses: In-vitro studies 在硼磷酸盐玻璃中添加ZrO2生物活性和力学性能的相互关系:体外研究
IF 3.2 3区 材料科学
Journal of Non-crystalline Solids Pub Date : 2025-06-24 DOI: 10.1016/j.jnoncrysol.2025.123679
Sushil Patel , Pooja Yadav , Arkaprabha Adhikari , Gangadhar Mahar , Peddy Satyanarayana , Bramanandam Manavathi , P Abdul Azeem
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