Journal of Non-crystalline Solids最新文献

{"title":"Pressure-induced structural transformations at different length scales in soda-lime silica glasses","authors":"Amirhossein F. Firooz ,&nbsp;Sudheer Ganisetti ,&nbsp;Christophe A.N. Biscio ,&nbsp;Tao Du ,&nbsp;N.M. Anoop Krishnan ,&nbsp;Morten M. Smedskjaer","doi":"10.1016/j.jnoncrysol.2025.123699","DOIUrl":"10.1016/j.jnoncrysol.2025.123699","url":null,"abstract":"<div><div>Despite the widespread use of soda-lime silica (SLS) glasses, their short-range order (SRO) and especially medium-range order (MRO) structures are still not fully understood. In this work, we study the effect of pressure quenching on the structure of SLS glasses. Our analyses are based on atomic configurations established through classical molecular dynamics simulations. We characterize the SRO through analysis of coordination numbers, <em>Qⁿ</em> speciation, and bond angle distributions, while we identify the MRO signatures using persistent homology and classical ring analysis to capture both chemically and non-chemically bonded rings. We also analyze the MRO signatures by analyzing the voids identified by persistent homology. We find that the densification results in an increase in both Si and O coordination number and altering bond angles. Considering MRO length scales, the position of the first sharp diffraction peak shifts to higher <em>Q</em> values while its intensity decreases with pressure. Additionally, we identify smaller voids and loops as well as tetrahedral and pentahedral symmetries in the densified glasses. Overall, our work offers insights into the densification mechanism of SLS glasses.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"666 ","pages":"Article 123699"},"PeriodicalIF":3.2,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144604872","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}

{"title":"Control of SrF2 crystal size in transparent germanate oxyfluoride glass-ceramics through Eu2O3 doping","authors":"Alizée Deslandes ,&nbsp;Théo Guérineau ,&nbsp;Mathieu Allix ,&nbsp;Cécile Genevois ,&nbsp;Jingxian Wang ,&nbsp;Véronique Jubera ,&nbsp;Younès Messaddeq ,&nbsp;Thierry Cardinal","doi":"10.1016/j.jnoncrysol.2025.123695","DOIUrl":"10.1016/j.jnoncrysol.2025.123695","url":null,"abstract":"<div><div>The development of transparent glass-ceramics is a challenging endeavor in the field of mid-infrared photonics in order to fabricate robust and optically efficient materials. In this study, the glass-forming region of the novel xGeO₂ – (100-x) (BaF₂, SrF₂, ½ In₂O₃) system is investigated, while SrF₂-forming glass-ceramic compositions are identified. DSC measurements upon Eu₂O₃ doping show a decrease in the onset temperature of SrF₂ crystallization. In the meantime, both XRD and TEM acquisitions confirm a decrease in crystal size as the dopant content increases. Part of the Eu³⁺ ions enter the SrF₂ crystallites, as demonstrated by steady-state and time-resolved spectroscopies. Hence, we demonstrate that europium oxide doping enables a precise control of SrF₂ nanocrystal size in the GeO₂-BaF₂-SrF₂-In₂O₃ system. Our findings open doors towards the nanostructure tailoring of SrF₂-containing germanate glass-ceramics using rare-earth dopants for luminescence and laser applications.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"666 ","pages":"Article 123695"},"PeriodicalIF":3.2,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144595803","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}

{"title":"Effect of Si/B ratio of low dielectric glass on its structure, properties and sealing mechanism for high-frequency communication","authors":"Weiwei Wang ,&nbsp;Xin Cao ,&nbsp;Jiwen Jiang ,&nbsp;Xiaobo Peng ,&nbsp;Junfei Liu ,&nbsp;Shou Peng","doi":"10.1016/j.jnoncrysol.2025.123691","DOIUrl":"10.1016/j.jnoncrysol.2025.123691","url":null,"abstract":"<div><div>Sealing glasses are widely used in the electronics industry to provide electrical insulation and form connectors with a range of metals. In this study, a range of SiO₂–B₂O₃–Al₂O₃–R₂O sealing glasses with low dielectric constant and low dielectric loss were prepared using conventional melting and quenching techniques, followed by powder processing. The effects of the SiO₂/B₂O₃ (Si/B) molar ratio on the structure, properties, and sealing mechanism of the glasses were investigated. The results indicated that the network structure of the glass system initially became more compact and subsequently relaxed with an increase in the Si/B ratio. The dielectric constant of the sealing glasses increased with increasing Si/B ratio, whereas the coefficient of thermal expansion and dielectric loss exhibited an initial decrease, followed by an increase. Optimal structural compactness was observed at a Si/B ratio of 2.76, resulting in a lower dielectric constant (4.04@10 GHz) and the lowest dielectric loss (12×10⁻⁴@10 GHz). Following sealing, the chemical bonds in the metal surface layer gradually shifted from metallic to ionic–covalent bonds, which facilitated a robust glass–metal bond. These sealing glasses are well suited for RF connector applications and hold promising market potential in the realm of high-frequency communication.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"666 ","pages":"Article 123691"},"PeriodicalIF":3.2,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144604871","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}

{"title":"Preparation of LAS transparent glass-ceramics with varying Nb2O5/ZrO2 ratios using spodumene smelting slag as raw material","authors":"Yuxin Gu ,&nbsp;Fu Wang ,&nbsp;Hanzheng Zhu ,&nbsp;Guoliang Xu ,&nbsp;Qilong Liao ,&nbsp;Laibao Liu ,&nbsp;Yong Dan ,&nbsp;Peng Zhao ,&nbsp;Yunxiu Liu","doi":"10.1016/j.jnoncrysol.2025.123693","DOIUrl":"10.1016/j.jnoncrysol.2025.123693","url":null,"abstract":"<div><div>This study utilizes spodumene smelting slag as the primary raw material for the preparation of lithium aluminosilicate glass-ceramics (LAS), addressing issues related to sustainable waste management. In this study, up to 50 wt % of spodumene smelting slag was incorporated into the material, resulting in LAS glass-ceramics with outstanding crystallinity. The maximum transmittance at 550 nm exceeds 88.25 %, while the Vickers hardness reaches approximately 7.27 GPa. Additionally, the influence of Nb₂O₅ substitution for ZrO₂ on the crystallization behavior of LAS glass-ceramics was investigated. The results indicate that replacing ZrO₂ with Nb₂O₅ effectively suppresses grain growth and promotes grain refinement. The resulting fine-grained glass-ceramics exhibit enhanced transparency and Vickers hardness.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"666 ","pages":"Article 123693"},"PeriodicalIF":3.2,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144580822","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}

{"title":"Experimental investigation, thermodynamic optimization and prediction of glass-forming ability of the Nb-Ni-Sn ternary system","authors":"Zongying Pan ,&nbsp;Biao Hu ,&nbsp;Changzheng Bu ,&nbsp;Xin Zheng ,&nbsp;Lin Ji ,&nbsp;Xinyue Lan","doi":"10.1016/j.jnoncrysol.2025.123688","DOIUrl":"10.1016/j.jnoncrysol.2025.123688","url":null,"abstract":"<div><div>At 800, 700 and 600°C, the phase equilibria of the Nb-Ni-Sn system were investigated through phases analysis of twenty-four designed equilibrated alloys. By analyzing the experimental results, it can be found that the addition of Ni can improve the stability of the Nb₆Sn₅ phase to be stable at below 700°C. In addition, the ternary compound NbNi₂Sn was confirmed with the composition of about Nb_24.5-23.2Ni_49.8-53.5Sn_25.6-23.3 (in at.%). The sublattice model Nb₁Ni₂(Ni, Sn)₁ was used to describe the NbNi₂Sn compound. The thermodynamic parameters of the Nb-Ni-Sn system were assessed by means of the CALPHAD methodology. Finally, the driving force of each phase in supercooled liquid phase was calculated by using the evaluation results, and the predicted composition region with high glass forming ability is very consistent with the literature data.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"666 ","pages":"Article 123688"},"PeriodicalIF":3.2,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144569961","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}

{"title":"Characterization, Dielectric and AC Electrical Properties of B2O3-Al2O3-BaO-x TiO2 (x = 0, 10, 15, and 20) Thermally Treated Glass","authors":"Sh Heikal ,&nbsp;Gehan T. El-Bassyouni ,&nbsp;Esmat M.A. Hamzawy","doi":"10.1016/j.jnoncrysol.2025.123687","DOIUrl":"10.1016/j.jnoncrysol.2025.123687","url":null,"abstract":"<div><div>The structural, dielectric, and AC electrical properties of a B₂O₃-Al₂O₃-BaO-xTiO₂ glass system were investigated by varying the TiO₂ content (0, 10, 15, and 20 mol. %). The glasses were synthesized via melt-quenching, and their thermal behavior exhibited an endothermic effect between 600 and 629 °C and an exothermic effect between 700 and 920 °C. Crystallization studies revealed the formation of BaB₂O₄, BaTiO₃ (barioperovskite), TiO₂ (baddeleyite), and Ti₈O₁₅, with submicron and nanoscale particles dispersed in the glass matrix, resulting in a thermally treated microstructure. Among the samples, BA15T demonstrated the highest density and Vickers hardness. Dielectric measurements (0.12–100 kHz, 303–573 K) showed that both the dielectric constant (<strong>ε</strong>) and loss tangent <em>(tan δ</em>) increased with rising temperature and decreasing frequency. The ferroelectric ↔ paraelectric phase transition produces a distinct anomaly at the Curie temperature (T_C), confirming that the thermally treated glass samples exhibit first-order phase transitions and behave as order-disorder-type ferroelectric materials<strong>.</strong> The AC conductivity was found to increase with both temperature and frequency<strong>,</strong> with the correlated barrier hopping (CBH) model identified as the dominant conduction mechanism. Ultimately, our findings demonstrate that TiO₂ significantly influences the structural and electrical properties of the B₂O₃-Al₂O₃-BaO glass system<strong>.</strong> These results suggest that the synthesized glass samples hold promise for potential applications in advanced electronic devices<strong>.</strong></div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"666 ","pages":"Article 123687"},"PeriodicalIF":3.2,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144556854","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}

{"title":"Toward a better understanding of the mechanisms that control dissolution of calcium aluminosilicate glass","authors":"A.J. Popel ,&nbsp;D.V. Okhrimenko ,&nbsp;M. Jensen ,&nbsp;K.H. Rasmussen ,&nbsp;E.D. Bøjesen ,&nbsp;M. Ceccato ,&nbsp;H.O. Sørensen ,&nbsp;L.Z. Lakshtanov ,&nbsp;M. Solvang ,&nbsp;S.L.S. Stipp","doi":"10.1016/j.jnoncrysol.2025.123692","DOIUrl":"10.1016/j.jnoncrysol.2025.123692","url":null,"abstract":"<div><div>We investigated the dissolution behaviour of <strong>c</strong>alcium <strong>a</strong>luminino<strong>s</strong>ilicate (CAS) glass at different pH values and temperature in batch and flow-through experiments. The temperature dependence of the dissolution rate over a wide pH range was measured under flow-through conditions at ambient temperature and at 50 and 75 °C, using crushed CAS glass powder (25 µm &lt; <em>x</em> &lt; 63 µm). CAS powder and single glass chips were exposed to deionised water (initial pH 5.6), an acetate buffer (pH 4.4–4.5) and a 0.1 M NaOH (pH 13) solution for 28 and 150 days in static batch mode at ambient temperature. Flow-through dissolution experiments demonstrated close to congruent dissolution of CAS powder with a minimum dissolution rate at neutral pH and an insignificant temperature dependence. Batch dissolution experiments resulted in slower initial dissolution rates than in flow-through tests, a dissolution rate drop over time, and incongruent CAS dissolution, with specific behaviour highly dependent on solid surface area-to-solution volume (S/V) and pH. Monitoring of the microstructural changes of CAS chips showed that CAS developed a complex calcium depleted layer in slightly acidic batch dissolution media. The thickness of this layer ranged from a few nanometres to several micrometres depending on S/V. At neutral pH, the thickness of the Ca depleted layer was only a few nanometres and Al enrichment (adsorption or secondary phase) of the top glass chip surface was observed. Samples leached in 0.1 M NaOH solution showed formation of secondary phases with various morphologies and stoichiometries, depending on initial S/V. The small size (≤ 1 µm) of these secondary phases made it difficult to identify them. The results highlight the complexity of CAS glass dissolution, which can involve congruent dissolution, leached layer formation or dissolution-precipitation mechanisms, depending on pH, temperature, and S/V.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"666 ","pages":"Article 123692"},"PeriodicalIF":3.2,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144556852","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}

{"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 S²⁻ and S⁶⁺ compared to corresponding standard samples; (2) consistent spectra were obtained from repeated measurements at the same location; and (3) the peak intensity ratio of S²⁻ to the sum of S²⁻ and S⁶⁺ 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 (S²⁻–H⁺) and sulfide-ferric (S²⁻–Fe³⁺) 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}

{"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 [V⁵⁺O₅]^5-, [V⁵⁺O₄]^3- and [V⁴⁺O₅]^6-. When the glass is synthetized under reducing conditions, the redox state is a mixture of V³⁺ and [V⁴⁺O₅]^6-. Our results show that optical absorption spectroscopy is well-suited to monitor changes in V⁴⁺ concentration, while Raman spectroscopy allows the monitoring of V⁵⁺. Vanadium reduction mechanism was investigated by performing Raman and optical absorption spectroscopy measurements along a reduction profile. Our results show that V³⁺, V⁴⁺ and V⁵⁺ coexist over a range of oxygen fugacity. This leads to sample color not being linear with oxidation state as the coexistence of V³⁺ and V⁵⁺ 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}

{"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}