Journal of Non-crystalline Solids最新文献

{"title":"An integrate study of the effects of CaF2 on the viscous behavior and structure of CaO-SiO2-MgO-Al2O3-CaF2 blast-furnace slag","authors":"Jianlu Zheng ,&nbsp;Xiangdong Xing ,&nbsp;Wenguo Liu ,&nbsp;Zhuogang Pang ,&nbsp;Rijun Hu ,&nbsp;Qingguo Xue ,&nbsp;Jingsong Wang ,&nbsp;Haibin Zuo","doi":"10.1016/j.jnoncrysol.2024.123310","DOIUrl":"10.1016/j.jnoncrysol.2024.123310","url":null,"abstract":"<div><div>Understanding the physical and chemical characteristics of fluorine-containing blast furnace slag is crucial for using fluorine-bearing ores in blast furnace melting. This paper comprehensively analyzes the effects of CaF₂ on the viscous flow characteristics and structural changes of CaO-SiO₂-MgO-Al₂O₃-CaF₂ blast furnace slag at 1773K. Viscosity measurement results suggest that a higher concentration of CaF₂ contributes to a reduction in slag viscosity. Increasing the CaF₂ content consistently decreases the viscosity of the slag, though the magnitude of this effect diminishes with higher CaF₂ levels. FT-IR shows changes in structure: the diminishing intensity of the [SiO₄]-tetrahedral vibration band and the T-O-T bond strength, shallowing of the groove depth. Besides, a slight narrowing of the shoulder width of the [AlO₄]-tetrahedral structure, but the change is insignificant. Raman results indicate a depolymerization of Si-based structural units. As the CaF₂ content increases from 0 % to 4 %, there is a rise in simpler Q⁰ and Q¹ structural units and a reduction in more complex Q² units. The Q³ structural units show a decreasing trend, without significant change upon further increase. The ratio of non-bridging oxygen to silicon (NBO/Si) increases from 1.95 to 2.28 with the addition of CaF₂, suggesting a lower level of slag polymerization. Fluorine ion serves as a network modifier within the slag structure. XPS results show a decline in the relative concentration of bridging oxygen, whereas the relative concentrations of NBO and free oxygen increase. Finally, ²⁷Al MAS NMR reveals that adding CaF₂ reduces the proportion of [AlO₄] and raises the proportion of [AlO₅] and [AlO₃F] units.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"648 ","pages":"Article 123310"},"PeriodicalIF":3.2,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653328","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":"A comprehensive study on tunable structural, optical and mechanical properties of recycled windscreen glasses","authors":"Santosh Kumar ,&nbsp;K. Singh ,&nbsp;Devender Kumar","doi":"10.1016/j.jnoncrysol.2024.123304","DOIUrl":"10.1016/j.jnoncrysol.2024.123304","url":null,"abstract":"<div><div>Waste front windscreen glasses of cars are recycled to study their feasibility for reuse in automobiles. The waste glasses are remelted at 1550<span><math><msup><mrow></mrow><mrow><mo>∘</mo></mrow></msup></math></span> C using 1 mol% of B<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>O<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span>, NaCl, KCl, and P<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>O<span><math><msub><mrow></mrow><mrow><mn>5</mn></mrow></msub></math></span> as additives. The remelted glasses are characterised and tested using the Fourier transform infrared, Raman spectroscopy, UV-visible spectroscopy, and Vicker’s microhardness tester, respectively. The addition of additives modified the glasses by changing the silicate structural units. These modifications lead to an increase in density and a decrease in molar volume compared to the glass without the above additives, recycled glass (RB7). The optical band gap of all the recycled glass falls within the insulating range of 3.43-3.54 eV, with a hardness range of 4.29-5.74 GPa. The P<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>O<span><math><msub><mrow></mrow><mrow><mn>5</mn></mrow></msub></math></span> contained recycled glasses that exhibited similar properties to those observed for pristine windscreen glasses. This approach finds a way to reuse windscreen glasses for automobiles with a decreased carbon footprint.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"648 ","pages":"Article 123304"},"PeriodicalIF":3.2,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653397","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":"Influence of ZnO content on liquid-liquid phase separation in photothermal refractive glass","authors":"Qiannan Li ,&nbsp;Baoxing Xiong ,&nbsp;Ziyi Ge ,&nbsp;Xiang Zhang ,&nbsp;Xiao Yuan","doi":"10.1016/j.jnoncrysol.2024.123306","DOIUrl":"10.1016/j.jnoncrysol.2024.123306","url":null,"abstract":"<div><div>At present, volume Bragg grating (VBG) is the core devices in the field of precision optical field modulation, and their performance is mainly influenced by the substrate photothermal refractive (PTR) glass. The liquid phase separation (LLPS) behavior occurring in the base glass can lead to unnecessary scattering losses and have adverse effects on the engineering applications of VBG. In recent years, many glass scientists have conducted research on the liquid-liquid phase separation (LLPS) of glass, believing that the structure of glass phase separation is related to the composition of the glass. This study used high-temperature melting method to prepare Na-Zn-Al-Si PTR glass doped with Ag, Ce, Sn and other elements through two-step heat treatment. In this experiment, the influence mechanism of ZnO on the LLPS of PTR glasses was investigated by controlling the doping amount of ZnO. Modern analysis techniques were used to investigate the mechanism of ZnO on the LLPS, the results confirm that no crystal phase is generated during the glass phase separation in this work, and doping 4 mol% ZnO is beneficial for suppressing the LLPS of PTR glasses. In addition, the introduction of Na₂O by using NaNO₃ can avoid the generation of Ag₂O and Ag₂CO₃ impurities, which is conducive to the precipitation of NaF grains.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"648 ","pages":"Article 123306"},"PeriodicalIF":3.2,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653395","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":"Phase equilibria of CaO-Al2O3-Ti2O3 system at 1500 °C and 1600 °C in C/CO equilibrium atmosphere","authors":"Jiyu Qiu ,&nbsp;Wenjie Li ,&nbsp;Chengjun Liu ,&nbsp;Maofa Jiang","doi":"10.1016/j.jnoncrysol.2024.123312","DOIUrl":"10.1016/j.jnoncrysol.2024.123312","url":null,"abstract":"<div><div>The phase diagram of CaO-Al₂O₃-Ti₂O₃ system has significant implications for the metallurgical slag design of Al-Ti alloy steel. In this work, the high-temperature equilibrium experiments were conducted at 1500 °C and 1600 °C in C/CO equilibrium atmosphere, respectively. The types and compositions of the equilibrium phases were determined by Electron Probe Micro Analysis (EPMA) and X-ray diffraction (XRD). The isothermal section of CaO-Al₂O₃-Ti₂O₃ system in the low <em>w</em>(TiO<em>_x</em>) region at 1500 °C was constructed for the first time, in which there are 6 three-phase fields, 7 two-phase fields, and a liquid phase field. The isothermal section of CaO-Al₂O₃-Ti₂O₃ system in the low <em>w</em>(TiO<em>_x</em>) region at 1600 °C was constructed and revised, including 3 three-phase fields, 6 two-phase fields, and a liquid phase field. Additionally, under the current experimental condition, the reasons for the formation of TiC in the high <em>w</em>(TiO<em>_x</em>) region of this slag system were analyzed, further discussing the effect of carbon on the phase equilibria of CaO-Al₂O₃-Ti₂O₃ system.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"648 ","pages":"Article 123312"},"PeriodicalIF":3.2,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653393","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":"Influence of gadolinium nanoparticle doped zinc boro tellurite glass system for potential radiation shielding and optical switching application.","authors":"S.N. Nazrin ,&nbsp;Doha Jouay ,&nbsp;Badreddine Lahrach ,&nbsp;Mongi Amami ,&nbsp;Halimah Badioze Zaman","doi":"10.1016/j.jnoncrysol.2024.123307","DOIUrl":"10.1016/j.jnoncrysol.2024.123307","url":null,"abstract":"<div><div>Using the melt quenching technique, a number of [(TeO₂)₇₀(B₂O₃)₃₀]₇₀(ZnO)₃₀₋ₓ(Gd₂O₃)ₓ glasses were created. The amorphous nature of the glasses was substantiated by X-ray diffraction (XRD), and the existence of GdO₃ nanoparticles was confirmed by transmission electron microscopy (TEM). Key vibrational groups were identified by Fourier-transform infrared (FTIR) spectroscopy: TeO₃, TeO₄, BO₃, and BO₄. The formation of TeO₄ units improved the radiation shielding capabilities of the glasses, especially in TBZG5, which showed superior photon absorption owing to the presence of large Gd³⁺ ions and lone pair electrons. Specifically, the Gd₂O₃ NP-doped glasses showed reverse saturable absorption and self-focusing behaviour with nonlinear absorption coefficients ranging from 0.660 to 0.729 cm/GW. These glasses also showed increasing nonlinear refractive indices coupled with decreasing overall refractive indices.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"648 ","pages":"Article 123307"},"PeriodicalIF":3.2,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653394","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":"Co-improvements of chemical stability and glass transition temperature via a mixed alkali effect in low-melting Li2O-Na2O-CaO-P2O5 sealing glasses","authors":"Huali Liu ,&nbsp;Shiquan Liu ,&nbsp;Junfeng Kang ,&nbsp;Yunlong Yue ,&nbsp;Xuchuan Jiang","doi":"10.1016/j.jnoncrysol.2024.123309","DOIUrl":"10.1016/j.jnoncrysol.2024.123309","url":null,"abstract":"<div><div>Enhanced chemical stability and reduced glass transition temperature are surely desirable for the low-melting sealing glasses. An elusive trade-off between the glass transition temperature and chemical durability in the phosphate glass systems, however, greatly limits the applications of low-melting sealing glasses. In this work, the co-improvements of chemical stability and glass transition temperature are achieved in the <em>x</em>Li₂O-(25-<em>x</em>)Na₂O-17CaO-58P₂O₅ glass system (0 ≤ <em>x</em> ≤ 20 mol%) via a mixed-alkali effect, and this effect on the glasses structures, thermal properties and chemical stability were systematically investigated. The FTIR, Raman and XPS spectra showed that the replacement of Na₂O with Li₂O will enhance and cross-link the glassy network. Particularly, the significantly reduced glass transition temperature (<em>T</em>_g∼331 °C) and softening temperature (<em>T</em>_s∼366 °C) were achieved in the glass with an optimized 10 mol% substitution of Li₂O, demonstrating a great potential of such the mixed-alkali-modulated glasses in the low-temperature sealing applications.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"648 ","pages":"Article 123309"},"PeriodicalIF":3.2,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653391","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":"Study of electric transport and impedance analysis in copper chloride modified bismuth boro-tellurite glasses","authors":"Komal Poria ,&nbsp;Sunil Dhankhar ,&nbsp;Rajesh Parmar ,&nbsp;R.S. Kundu","doi":"10.1016/j.jnoncrysol.2024.123301","DOIUrl":"10.1016/j.jnoncrysol.2024.123301","url":null,"abstract":"<div><div>CuCl₂ substituted bismuth borate tellurite glasses were examined for electrical conductivity at frequencies between 10⁻¹ Hz and 10⁶ Hz and temperatures between 463 K and 563K. The Almond West law used for fitting experimental data of ac conductivity, and determining cross-over frequency (ω_H), frequency exponent (s), and dc conductivity (σ_dc). Depending on the glass composition, ac conduction process was modeled using correlated barrier hopping and non-overlapping small polaron tunneling. The imaginary component of the electric modulus included in the experimental data fitted by non-exponential Kohlrausch-Williams-Watts. Impedance examination reveals minimization of mixed former effect on electric charge transport at low frequencies in studies glasses. For <em>x</em> = 20, conduction occurs due to charge carriers (Cu²⁺ ions/polarons). An excellent match is found between the Nyquist plots and equivalent circuit models. There is good agreement between the estimated activation energy from conductivity E_C (0.82–1.13 eV), electric modulus E_R (0.81–1.12 eV), and impedance E_Z (0.82–1.15 eV) analyses.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"648 ","pages":"Article 123301"},"PeriodicalIF":3.2,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653392","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":"Predicting the viscosity of basalt melt by data-driven and interpretable machine learning","authors":"Qing-Yuan Han ,&nbsp;Xiong-Yu Xi ,&nbsp;Yixuan Ma ,&nbsp;Xungai Wang ,&nbsp;Dan Xing ,&nbsp;Peng-Cheng Ma","doi":"10.1016/j.jnoncrysol.2024.123302","DOIUrl":"10.1016/j.jnoncrysol.2024.123302","url":null,"abstract":"<div><div>Basalt fiber is a high-performance fiber made from natural basalt ore by high-temperature melting and filament-forming. The viscosity of basalt melt plays crucial role in regulating melting process and enhancing properties of formed fiber. Here, a dataset of oxide composition in basalt, temperature, and corresponding melt viscosity was collected from reported papers and self-tested samples. By using data-driven and interpretable machine learning technique, two models of Random Forest and Gradient Boosting Decision Tree were established. Both models could learn the dataset and predicted the melt viscosity from the input oxide composition and temperature. A Shapley additive interpretation was conducted on built models, which led to an understanding of significance and pattern of various oxide compositions that impact viscosity. Based on these findings, a prediction on temperature parameters for ore melting and filament-forming was achieved, and continuous basalt fibers were obtained on a fiber spinning facility by using self-tested samples.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"648 ","pages":"Article 123302"},"PeriodicalIF":3.2,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653387","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":"Silica gels doped with gold nanoparticles and gold thiolate complexes: The effect of heating and preparation conditions","authors":"N. Danchova,&nbsp;R. Tsekov,&nbsp;D. Shandurkov,&nbsp;S. Gutzov,&nbsp;L. Lyubenova,&nbsp;L. Mihaylov,&nbsp;T. Spassov","doi":"10.1016/j.jnoncrysol.2024.123308","DOIUrl":"10.1016/j.jnoncrysol.2024.123308","url":null,"abstract":"<div><div>A novel sol-gel strategy for the preparation of silica nanocomposites, containing gold nanoparticles (AuNPs), Au(I)-thiolate complexes (Au-SC12) or both disperse phases is demonstrated. The color of the species depends on the size and surrounding of the AuNPs. The nanocomposites obtained are characterized with UV/Vis reflectance spectroscopy, X-Ray diffraction, TEM / EDAX and thermal conductivity measurements. An analysis of the UV/VIS spectra, based on Mie's theory, suggests the presence of 5 - 30 nm AuNPs with different chemical surroundings. Heating of the nanocomposites at 700 °C leads to red or violet colored SiO₂:AuNPs powders. The thermal conductivity of the nanocomposites is about 0.05–0.07 W/m.K, depending on sintering and chemical composition. A discussion about the microstructure of the composites is also presented.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"648 ","pages":"Article 123308"},"PeriodicalIF":3.2,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Application of confocal laser scanning microscopy to investigation of micro crystals in transparent amorphous media: Photoluminescence tomography and spectroscopy of CdZnSSe crystallites in historical silicate glass","authors":"Vladimir A. Yuryev ,&nbsp;Oleg V. Uvarov ,&nbsp;Tatyana V. Yuryeva ,&nbsp;Victor P. Kalinushkin","doi":"10.1016/j.jnoncrysol.2024.123296","DOIUrl":"10.1016/j.jnoncrysol.2024.123296","url":null,"abstract":"<div><div>Recently, photoluminescence tomography based on the confocal laser scanning microscopy with two-photon excitation has been developed to study the distribution of point and extended defects in the bulk of ZnSe laser crystals. This article presents the use of the tomography to investigate luminescent micro inclusions in transparent amorphous media such as silicate glass. Studies of CdZnSSe crystals synthesized in a silicate glass melt have been carried out using the tomography with both two-photon and single-photon excitation of luminescence. Zn-rich glass manufactured in the 19th century has been found to contain micron-sized crystals of Cd<span><math><msub><mrow></mrow><mrow><mi>ξ</mi></mrow></msub></math></span>Zn<span><math><msub><mrow></mrow><mrow><mn>1</mn><mo>−</mo><mi>ξ</mi></mrow></msub></math></span>S<span><math><msub><mrow></mrow><mrow><mi>ζ</mi></mrow></msub></math></span>Se<span><math><msub><mrow></mrow><mrow><mn>1</mn><mo>−</mo><mi>ζ</mi></mrow></msub></math></span> (<span><math><mrow><mi>ξ</mi><mo>≈</mo><mn>0</mn><mo>.</mo><mn>5</mn></mrow></math></span>, <span><math><mrow><mi>ζ</mi><mo>≈</mo><mn>0</mn><mo>.</mo><mn>5</mn></mrow></math></span>) of hexagonal crystal system exhibiting intense photoluminescence. The photoluminescence band of these crystals has been found to peak at about 2.1 eV (<span><math><mrow><mo>∼</mo><mn>590</mn><mspace></mspace><mi>nm</mi></mrow></math></span>) at 300 K. Minor shifts in the maximum of bands and changes in their shape in individual crystals or at tomogram points within the crystal are associated with variations in their composition. Changes in the photoluminescence band shape and maximum due to the excitation of luminescence in CdZnSSe crystallites by laser radiation of different energies have also been observed in this study.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"648 ","pages":"Article 123296"},"PeriodicalIF":3.2,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653390","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}