Glass Physics and Chemistry最新文献

{"title":"Novel BaBi2B2O7:Eu3+/Tb3+/Tm3+ Co-Doping Phosphors and Compositional Deformations in BaBi2B2O7:REE3+ Systems","authors":"S. V. Demina,&nbsp;A. P. Shablinskii,&nbsp;A. V. Povolotskiy,&nbsp;R. S. Bubnova,&nbsp;S. K. Filatov","doi":"10.1134/S1087659625601339","DOIUrl":"10.1134/S1087659625601339","url":null,"abstract":"<p>The development of white-light phosphors via Eu³⁺/Tb³⁺/Tm³⁺ co-doping remains challenging due to imbalanced energy transfer and site-selective incorporation. In this work, we investigate the luminescent properties of BaBi_{1.70 − <i>x</i>}Eu_<i>x</i>Tb_0.15Tm_0.15B₂O₇ (<i>x</i> = 0.05, 0.10, 0.15) solid solutions synthesized by solid-state reaction. Powder XRD confirms homogeneity of phosphors and a monotonic decrease of unit cell parameters, consistent with Bi³⁺ → Eu³⁺ substitution. Based on experimental data, the miscibility limit for the triple-doped system is estimated at <i>x</i> = 0.475, which is higher than that for single-doped BaBi_{2 − <i>x</i>}Eu_<i>x</i>B₂O₇ (<i>x</i> = 0.45), indicating an expansion of the isomorphic miscibility range upon co-doping. Under 295 nm excitation, luminescence is dominated by intense red emission from Eu³⁺ (614 nm), while green (Tb³⁺) and blue (Tm³⁺) components are virtually absent. Excitation spectra at 614 nm show no features attributable to Tb³⁺ or Tm³⁺, and CIE coordinates remain in the red region (<i>x</i> ≈ 0.647, <i>y</i> ≈ 0.345). Although white emission was not achieved, this study provides some insights into the role of crystallographic site preference and compositional deformations in multi-ion-doped phosphor design which is essential for rational development of efficient UV-convertible white-light materials.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":"52 1","pages":"93 - 103"},"PeriodicalIF":0.7,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148357788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structural, Thermal, Dielectric, and Physical Properties of 40Bi2O3–30Li2O–15B2O3–7CuO–5TeO2–3MoO3 Glass and Their Relevance to Thermoelectric Applications","authors":"Peerapong Yamchumporn,&nbsp;Kitipun Boonin,&nbsp;Patarawagee Yasaka,&nbsp;Narit Triamnak,&nbsp;Thanapong Sareein,&nbsp;Jakrapong Kaewkhao","doi":"10.1134/S1087659625600310","DOIUrl":"10.1134/S1087659625600310","url":null,"abstract":"<p>A 40Bi₂O₃–30Li₂O–15B₂O₃–7CuO–5TeO₂–3MoO₃ glass was synthesized by melt-quenching at 1200°C to investigate its structural, thermal, dielectric, and basic physical properties as a Bi₂O₃-rich oxide glass with potential relevance to thermoelectric research. Density and molar volume determined by Archimedes’ method were 4.63 g cm^–3 and 48.28 cm³ mol^–1, respectively, indicating a relatively compact glass network influenced by heavy metal oxides. X-ray diffraction confirmed the amorphous nature of the sample. Fourier-transform infrared spectra revealed vibrations associated with BO₃ and BO₄ units and borate-related species (including metaborate- and pyroborate-type units), consistent with a borate-based network modified by Bi₂O₃, CuO, and TeO₂; however, boroxol rings cannot be assigned unambiguously from the present spectra. Differential scanning calorimetry conducted between room temperature and 650°C showed a glass transition near 420°C and no strong crystallization peak in this range, indicating good thermal stability at moderate temperatures. The dielectric response, measured between 100 Hz and 1 MHz, exhibited high capacitance and permittivity at low frequencies, followed by a marked decrease with increasing frequency, which can be attributed to the progressive freezing of ionic and interfacial polarization and is consistent with Maxwell-Wagner type behaviour. These results provide baseline information on the structure, thermal behaviour, and dielectric properties of this Bi₂O₃-rich glass composition and indicate that further work, including direct measurements of electrical resistivity, Seebeck coefficient, and thermal conductivity, is required before its thermoelectric performance can be fully assessed.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":"52 1","pages":"1 - 8"},"PeriodicalIF":0.7,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148357813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Graphitization of Diamond Crystals in the Manufacturing of Diamond–SiC–Si Composite","authors":"S. P. Bogdanov,&nbsp;A. S. Dolgin,&nbsp;M. M. Sychev,&nbsp;K. S. Prilezhaev,&nbsp;N. A. Khrystyuk","doi":"10.1134/S108765962560084X","DOIUrl":"10.1134/S108765962560084X","url":null,"abstract":"<p>The graphitization of diamond single crystals with a grain size of 200–250 µm was studied when heated to 1000–1300°C. During the production of diamond–SiC composites by vacuum siliconization of a porous diamond matrix, not only the surface graphitization of diamond grains, but also the graphitization of the diamond at internal defects occurs. A decrease in the average strength of a single grain of diamond crystals as a result of their heat treatment both in an inert medium and during vacuum siliconization was demonstrated. It was found that siliconizing at a furnace temperature of 1550°C, despite the short process time, leads to a significant (40%) drop in the strength of diamond crystals. At the same time, within the diamond mass there are always individual grains that have retained their strength during the heat treatment process.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":"52 1","pages":"57 - 63"},"PeriodicalIF":0.7,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148357878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hydrothermal Synthesis of Chrysotile Nanoparticles with the Addition of Titanium Fluoride","authors":"E. N. Gatina,&nbsp;V. L. Ugolkov,&nbsp;A. A. Osminina","doi":"10.1134/S1087659625600899","DOIUrl":"10.1134/S1087659625600899","url":null,"abstract":"<p>The combined effect of fluoride (F^–) and titanium (Ti⁴⁺) ions on the formation of hydrosilicate nanotubes under hydrothermal conditions. It was found that titanium ions can be incorporated into the crystalline structure of hydrosilicates and occupy positions within the nanotube channels. It was revealed that the temperature and the ratio of reagents in the hydrothermal fluid significantly affect the phase composition of the synthesis products, determining the phase ratio of hydrosilicates and titanium-containing components.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":"52 1","pages":"114 - 121"},"PeriodicalIF":0.7,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148357752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative Study of Photocatalytic Activity of Zinc Oxide Modified with Copper and Aluminum","authors":"N. D. Yakushova,&nbsp;I. A. Gubich,&nbsp;I. A. Pronin,&nbsp;A. S. Komolov,&nbsp;A. A. Karmanov","doi":"10.1134/S1087659625600656","DOIUrl":"10.1134/S1087659625600656","url":null,"abstract":"<p>The paper presents a comparative study of ZnO, ZnO:Cu, and ZnO:Al films obtained by the sol–gel method. The concentration of dopants in all cases was 6 at %. The structural, optical and photocatalytic properties of the obtained materials were studied. A study of the surface of the samples using scanning electron microscopy showed that the use of copper as a modifier leads to a dramatic change in the surface morphology and the absence of the formation of hierarchical structures characteristic of sol–gel synthesis. A study of the optical properties showed that copper-modified zinc oxide films have the lowest transmittance in the entire analyzed spectral range. Calculation of the optical band gap also revealed that copper doping resulted in a reduction in this parameter, while aluminum doping did not show any noticeable changes. A decrease in the size of coherent scattering regions (more than threefold) was observed for ZnO:Al compared to ZnO and ZnO:Cu. The diffraction patterns of ZnO:Cu revealed reflections corresponding to copper oxide CuO, which is confirmed by FTIR spectroscopy data. It was shown that the best photocatalytic activity in the photodegradation reaction of methyl orange was demonstrated by ZnO:Al samples when irradiated with both visible and ultraviolet radiation.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":"52 1","pages":"122 - 131"},"PeriodicalIF":0.7,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148357755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Acid Treatment of a Geopolymer Synthesized via the Dispersant Template Method for Enhanced Acetone Adsorption Performance","authors":"Yuuki Kitakaze,&nbsp;Jianyao Cao,&nbsp;Teruhisa Hongo","doi":"10.1134/S1087659625600978","DOIUrl":"10.1134/S1087659625600978","url":null,"abstract":"<p>Powdered aluminosilicate materials were synthesized directly from metakaolin by the dispersant template (DT) method to address the difficulty of grinding monolithic geopolymers for adsorption applications. The resulting powder was subjected to nitric acid treatment at various concentrations to examine the effects on composition, structure, texture, and acetone vapor adsorption. Comprehensive characterization indicated that the DT-derived parent material consisted of partially geopolymerized aluminosilicate together with residual metakaolin, and that acid treatment induced dealumination and partial breakdown of the aluminosilicate framework, leading to silica-rich structures. Nitrogen adsorption–desorption measurements showed that the specific surface area increased markedly with acid concentration, reaching the highest value for the sample treated with 5 mol L^–1 nitric acid, which exhibited a surface area more than four times that of the untreated material. Acetone adsorption experiments demonstrated that the 5 mol L^–1 nitric acid-treated sample adsorbed 16.0 µmol/g within 30 min and reached 26.2 µmol/g after 3 h, approximately 1.5 times greater than the untreated sample. The enhanced performance is attributed to the increased surface area and the development of a more favorable pore structure in the acid-treated, silica-rich aluminosilicate framework.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":"52 1","pages":"35 - 44"},"PeriodicalIF":0.7,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148357785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 Water–Organic Medium on the Phase Composition of Modified Aluminum Oxide Systems in Electrochemical Synthesis of Precursors","authors":"E. V. Petrova,&nbsp;A. F. Dresvyannikov,&nbsp;L. I. Kashfrazyeva,&nbsp;A. I. Khairullina","doi":"10.1134/S1087659625600929","DOIUrl":"10.1134/S1087659625600929","url":null,"abstract":"<p>Possessing a high complex of mechanical and functional properties: tensile strength, hardness, wear resistance, corrosion resistance, heat resistance and bio-inertness, Al₂O₃–ZrO₂ systems are an effective material used for the manufacture of products that operate in harsh conditions. The main problem with currently used production methods is the limitations caused by the aggregability of particles. One of the approaches to reducing the degree of their aggregation is the use of organic or mixed aqueous-organic media. At the same time, the question of the influence of the solvent on the phase composition and structure of the forming precursor of the oxide system remains open. In this regard, the aim of the work is to identify patterns of influence of the solvent composition and electrolysis conditions on the chemical and phase composition of the final product and some of its physicochemical characteristics. The synthesis of precursors of oxide systems was carried out using a diaphragm-free coaxial electrolyzer reactor, where the cathode is Kh18N10T steel, and the soluble anode is 99.95% aluminum. Water–isopropyl alcohol solutions in various ratios, containing 0.5 M NaCl to ensure activation of the anode surface and Zr(NO₃)₄ were used as electrolytes. It was found that during the process of electrolysis with anodic dissolution of aluminum the use of a mixed solvent (water-isopropanol) makes it possibleallows, to regulate the content of bound water in the sediment, the ratio of the zirconium dioxide and aluminum oxide phases in the aluminum oxide system, and also to contribute to a reduction in particle size. In this case, the total amount of aluminum oxides in the oxide system Al₂O₃–ZrO₂ decreases, and the total amount of zirconium oxides increases (the dominant phase is tetragonal zirconium dioxide, the content of which in the product reaches 49% with an isopropanol content of 40 vol % in the initial electrolyte solution).</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":"52 1","pages":"84 - 92"},"PeriodicalIF":0.7,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148357750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Controlled Formation and AFM Monitoring of Active Layers of Hybrid Perovskites for Solar Cells","authors":"E. N. Muratova,&nbsp;A. A. Ryabko,&nbsp;A. A. Bobkov,&nbsp;I. A. Vrublevsky,&nbsp;A. K. Tuchkovsky,&nbsp;D. A. Kozodaev,&nbsp;A. I. Maksimov,&nbsp;V. A. Moshnikov","doi":"10.1134/S1087659625600528","DOIUrl":"10.1134/S1087659625600528","url":null,"abstract":"<p>This paper presents the results of a study on the controlled formation and comprehensive diagnostics of hybrid halide perovskite films for use in solar energy. The main focus is on the development of a technological approach that allows for targeted control of the morphology of the active layer at the synthesis stage. Films of the composition CH₃NH₃PbI₃ (MAPbI₃) modified with monoethanolammonium lead iodide (HOC₂H₄NH₃PbI₃, MEAPbI₃) additives were obtained by centrifugation from dimethylformamide (DMF)-based solutions). It was shown that the electrophysical characteristics, correlating with the experimental values of the fractal dimension, change with changing the concentration of additives and effects on the fractal dimension. Varying the additive concentration of the (0–70%) made it possible to determine the optimal ratio of components (MA_0.8MEA_0.2PbI₃), which provides a significant improvement in the wettability of the precursor on a glass substrate (a decrease in of the contact angle from ~20° to ~12°) without a significant change in the optical band gap (~1.6 eV). Using contact mode atomic force microscopy (AFM) and scanning spreading resistance scanning microscopy (SSRM), it was shown for the first time that the MEAI additive induces the formation of a hierarchical surface with a fractal dimension of 2.21, which corresponds to the formation of a quasi 2D/3D structure. It was found that the boundaries of the elements of this fractal structure have increased resistance, creating a system of barriers for the diffusion of ions. Thus, the article proposes a solution to an important problem related to increasing the stability of perovskite solar cells through targeted control of the active layer morphology at the stage of its synthesis. The proposed approach and set of diagnostic methods represent an effective tool for developing new perovskite materials with controlled properties and increased operational stability for solar energy applications.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":"52 1","pages":"104 - 113"},"PeriodicalIF":0.7,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148357751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 the Physicochemical Properties of Nanopowders and Ceramics Based on the CeO2–Rare Earth Oxides (Sm2O3, Nd2O3, Dy2O3) Systems as Electrolyte Materials for Medium-Temperature Fuel Cells","authors":"M. V. Kalinina,&nbsp;T. V. Khamova,&nbsp;A. S. Kovalenko,&nbsp;S. V. Myakin,&nbsp;I. G. Polyakova,&nbsp;O. A. Shilova","doi":"10.1134/S1087659625600553","DOIUrl":"10.1134/S1087659625600553","url":null,"abstract":"<p>Highly dispersed powders based on the CeO₂–rare earth oxides (Sm₂O₃, Nd₂O₃, Dy₂O₃) systems were synthesized using the method of cocrystallization of nitrate salts. On their basis, ceramic materials were obtained, which are solid solutions with a cubic lattice of the fluorite type with coherent scattering regions (CSRs) of ~ 66–88 nm (1300°С) and open porosity in the range of 2.0–6.5%. A comparative study of the physical and chemical properties of the obtained ceramics showed that in the systems CeO₂–Nd₂O₃ and CeO₂–Dy₂O₃ the dense and low-porosity materials are formed only by introducing a sintering additive in the form of zinc oxide. The resulting ceramics have a mixed type of conductivity, but in the medium-temperature range the ionic mechanism of electrical conductivity predominates (ion transport numbers <i>t</i>_i = 0.75–0.91 in the range of 300–700°С). The CeO₂ samples containing 20 mol % Sm₂O₃ and 15 mol % Nd₂O₃ or Dy₂O₃ have the highest ionic conductivity in the temperature range of 500–700°С: σ_700°С = 1.3 × 10^–2 S/cm, σ_700°С = 0.46 × 10^–2 S/cm, and σ_700°С = 0.43 × 10^–2 S/cm, respectively. Based on their physicochemical properties (density, open porosity, type and mechanism of specific electrical conductivity), the obtained ceramic materials are promising as solid oxide electrolytes for medium-temperature fuel cells.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":"52 1","pages":"64 - 76"},"PeriodicalIF":0.7,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148357787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ceramic Composite Matrices Based on the HfSiO4–ZrO2 System and Their Properties","authors":"L. P. Mezentseva,&nbsp;A. V. Osipov,&nbsp;N. A. Koval’chuk,&nbsp;A. A. Akatov,&nbsp;V. L. Ugolkov,&nbsp;L. A. Koptelova","doi":"10.1134/S1087659625601236","DOIUrl":"10.1134/S1087659625601236","url":null,"abstract":"<p>Sol-gel synthesis of (1 ‒ <i>x</i>)(Hf(OH)₄–H₂SiO₃)‒<i>x</i>ZrO(OH)₂ precursor powders was performed. Ceramic composites (1 ‒ <i>x</i>)HfSiO₄‒<i>x</i>ZrO₂ were obtained by sintering the precursor powders in the temperature range of 1000‒1300°C. Thermal behavior of the precursor powders was studied using the DSC/TG. X‑ray diffraction showed that the addition of ZrO₂ stabilizes hafnium silicate, preventing its decomposition in the composites. It was found that sintering of (1 ‒ <i>x</i>)HfSiO₄–<i>x</i>ZrO₂ compositions at 1300°C leads to partial decomposition of hafnium silicate with the formation of HfO₂ and SiO₂; at this temperature the composites are a mixture of hafnium silicate, monoclinic solid solutions of Hf_<i>x</i>Zr_{1 – <i>x</i>}O₂, and SiO₂. The Vickers microhardness values and thermal conductivity values in the temperature range from room temperature to 250°C were determined; SEM images of the fracture surface of ceramic samples before and after leaching were presented. The chemical resistance of ceramic composites as matrices for radionuclides was assessed using the leaching method. All characteristics of the compositions were obtained for the first time.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":"52 1","pages":"45 - 56"},"PeriodicalIF":0.7,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148357756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}