Glass Physics and Chemistry最新文献_第5页

Synthesis and Study of La2O3–SiO2 Systems Obtained from Kaolin and Tetraetoxysilane 高岭土和四乙氧基硅烷制备La2O3-SiO2体系的合成与研究

IF 0.8 4区材料科学

Glass Physics and Chemistry Pub Date : 2025-03-03 DOI: 10.1134/S1087659624600959

S. I. Niftaliev, I. V. Kuznetsova, L. V. Lygina, N. I. Ponomareva, S. E. Plotnikova, S. S. Mironov, K. B. Kim, Tran Nhat Anh

{"title":"Synthesis and Study of La2O3–SiO2 Systems Obtained from Kaolin and Tetraetoxysilane","authors":"S. I. Niftaliev, I. V. Kuznetsova, L. V. Lygina, N. I. Ponomareva, S. E. Plotnikova, S. S. Mironov, K. B. Kim, Tran Nhat Anh","doi":"10.1134/S1087659624600959","DOIUrl":"10.1134/S1087659624600959","url":null,"abstract":"La2O3–SiO2 systems are synthesized from kaolin and tetraethoxysilane. The thermal decomposition of images after freeze-drying when heated to 1000°C is studied using thermogravimetry and differential scanning calorimetry. The morphology of the samples is studied by transmission electron microscopy (TEM) and dynamic light scattering (DLS); the acid–base properties of the surface are determined by the indicator method. During the heating of samples in the temperature range of 25–600°C, endothermic effects are discovered, accompanied by weight loss. The structure of the kaolin sample is heterogeneous; nanoparticles (10 nm) of lanthanum oxide are located on the surface of microparticles (220–270 nm) of silicon oxide. The sample obtained from tetraethoxysilane has a homogeneous nanostructure with particle sizes of 5–13 nm, but is characterized by less intense sorption values at Brønsted acid sites (pKa 1.7; 3.46) compared to the sample from kaolin. This is due to the production of the La2O3–SiO2 system already in solution and the blocking of silanol groups on the surface of silicon oxide. A significant increase in specific adsorption at pKa 9.2 for both the kaolin and tetraethoxysilane samples proves the existence of La3+ metal ions and OH– hydroxyl groups on the surface of silicon oxide.","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":"50 4","pages":"411 - 417"},"PeriodicalIF":0.8,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533046","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}

引用次数: 0

Temperature Dependence of the Specific Heat of Borate Bismuth Glasses with the Addition of Sodium 添加钠对硼酸铋玻璃比热的温度依赖性

IF 0.8 4区材料科学

Glass Physics and Chemistry Pub Date : 2025-03-03 DOI: 10.1134/S1087659623600783

D. S. Kuchakshoev, A. G. Dzhabarov, A. Kholov

引用次数: 0

Structure Formation and Electrophysical Properties of Natural Zeolites, Mechanoactivated with Potassium Hydrophosphate for Obtaining Solid Electrolytes 氢磷酸钾机械活化天然沸石的结构形成和电物理性质

IF 0.8 4区材料科学

Glass Physics and Chemistry Pub Date : 2025-03-03 DOI: 10.1134/S1087659624600996

O. N. Dabizha, T. P. Soloboeva, M. V. Kalinina, O. A. Shilova

{"title":"Structure Formation and Electrophysical Properties of Natural Zeolites, Mechanoactivated with Potassium Hydrophosphate for Obtaining Solid Electrolytes","authors":"O. N. Dabizha, T. P. Soloboeva, M. V. Kalinina, O. A. Shilova","doi":"10.1134/S1087659624600996","DOIUrl":"10.1134/S1087659624600996","url":null,"abstract":"Mechanochemical activation of the impact-shear type of air-dry mixtures of clinoptilolite-stilbite and clinoptilolite rocks together with 25, 33, and 50 wt % potassium hydrogen phosphate trihydrate is carried out. The structure, phase, elemental, and granulometric composition, morphology, and physical properties of the powders are studied using infrared spectroscopy, differential scanning calorimetry, X-ray phase analysis, energy-dispersive X-ray spectrometry, sieve analysis, scanning electron microscopy, gravimetry, and air permeability. The electrical conductivity of tablet samples is measured in the temperature range from 25 to 580°C. It is found that the electrical conductivity of clinoptilolite-stilbite rock containing 50 wt % potassium hydrogen phosphate trihydrate, subjected to impact-shear action with the absorption of a mechanical energy dose of 5.04 kJ g–1, is equal to 7.06 × 10–2 S m–1 at 560°C. It has been shown that mechanochemical activation of zeolite together with potassium hydrogen phosphate crystal hydrate contributes to an effective increase in conductivity and is a promising method for obtaining solid electrolytes.","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":"50 4","pages":"428 - 443"},"PeriodicalIF":0.8,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533218","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}

引用次数: 0

Photoluminophores Based on Porous Glasses Coactivated by Cu2+ and Y3+: Synthesis and Spectral Properties 基于Cu2+和Y3+共激活多孔玻璃的光致发光团的合成及其光谱性质

IF 0.8 4区材料科学

Glass Physics and Chemistry Pub Date : 2025-03-03 DOI: 10.1134/S1087659624600753

M. A. Girsova, G. F. Golovina, I. N. Anfimova, L. N. Kurilenko, T. V. Antropova

{"title":"Photoluminophores Based on Porous Glasses Coactivated by Cu2+ and Y3+: Synthesis and Spectral Properties","authors":"M. A. Girsova, G. F. Golovina, I. N. Anfimova, L. N. Kurilenko, T. V. Antropova","doi":"10.1134/S1087659624600753","DOIUrl":"10.1134/S1087659624600753","url":null,"abstract":"Composite materials (CMs) based on matrices of high-silica porous glasses activated by Cu2+ and Y3+ ions are synthesized. The influence of the composition of composites (concentration and ratio of copper and yttrium introduced) and the temperature of their heat treatment (in the range of 50–870°C) on their spectral properties is studied. Examining samples using optical and IR spectroscopy reveals absorption bands related to Cu2+ ions and caused by vibrations of the Y–O bonds in Y2O3. It is established that, depending on the synthesis conditions, the obtained materials possess UV, blue-green, and IR luminescence due to the presence of various active centers (defects and oxygen vacancies in CuO, Cu2+ ions, radicals <img>, and F centers in Y2O3, =Si0 centers, E' centers (O3≡({text{Si}} cdot )), neutral oxygen vacancies (O3≡Si–Si≡O3), and nonbridging oxygen defect centers in the silica matrix of glass.","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":"50 4","pages":"347 - 362"},"PeriodicalIF":0.8,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533041","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}

引用次数: 0

Formation of Diamond-Like Carbon Films by the Plasma-Chemical Decomposition of Hydrocarbons 碳氢化合物等离子体化学分解形成类金刚石碳膜

IF 0.8 4区材料科学

Glass Physics and Chemistry Pub Date : 2025-01-13 DOI: 10.1134/S1087659624600728

A. V. Povolotskiy, E. V. Smirnov, Yu. S. Tver’yanovich

引用次数: 0

On the Possibility of the Existence of Inorganic Glasses with Plasticity at Temperatures Below the Glass Transition Temperature 在玻璃化转变温度以下存在塑性无机玻璃的可能性

IF 0.8 4区材料科学

Glass Physics and Chemistry Pub Date : 2025-01-13 DOI: 10.1134/S1087659624600583

Yu. S. Tver’yanovich

引用次数: 0

Sol-Gel Synthesis of Nano-Sized Powders and Fabrication of Ceramic Composites Based on Zircon and Hafnium Oxide 溶胶-凝胶法制备纳米粉体及锆英石-氧化铪陶瓷复合材料

IF 0.8 4区材料科学

Glass Physics and Chemistry Pub Date : 2025-01-13 DOI: 10.1134/S108765962460056X

V. L. Ugolkov, N. A. Koval’chuk, A. V. Osipov, L. P. Mezentseva

引用次数: 0

A Comparative Study of Zirconium Dioxide-Based Powders and Ceramics Obtained by Various Methods of Synthesis 不同合成方法制备的二氧化锆基粉体与陶瓷的比较研究

IF 0.8 4区材料科学

Glass Physics and Chemistry Pub Date : 2025-01-13 DOI: 10.1134/S1087659624600212

N. Yu. Fedorenko, O. L. Belousova, S. V. Myakin, D. S. Ershov, L. N. Efimova

引用次数: 0

Nano-Sized Compositions of the LaPO4–ZrSiO4 System: Synthesis and Physicochemical Properties 纳米LaPO4-ZrSiO4体系的合成及其物理化学性质

IF 0.8 4区材料科学

Glass Physics and Chemistry Pub Date : 2025-01-13 DOI: 10.1134/S1087659624600546

L. P. Mezentseva, A. V. Osipov, V. L. Ugolkov, L. A. Koptelova, T. V. Khamova

{"title":"Nano-Sized Compositions of the LaPO4–ZrSiO4 System: Synthesis and Physicochemical Properties","authors":"L. P. Mezentseva, A. V. Osipov, V. L. Ugolkov, L. A. Koptelova, T. V. Khamova","doi":"10.1134/S1087659624600546","DOIUrl":"10.1134/S1087659624600546","url":null,"abstract":"In accordance with the developed original method of the sol-gel synthesis of compositions, based on the separate precipitation of components (using the reverse precipitation technique) followed by their mixing and sintering, ceramic composites based on the LaPO4–ZrSiO4 system are obtained. The developed sol-gel synthesis technique is based on the separate preparation of colloidal solutions of LaPO4·nH2O and zirconium hydroxide ZrO(OH)2, formed after adding ammonia solution (sols) and an alcohol solution of TEOS (gel) by reverse precipitation and subsequent mixing of the sols and gel with the addition of the ammonia solution to obtain the corresponding compositions ((1 – x)LaPO4·nH2O–x(H2SiO3‒ZrO(OH)2)) in the form of gels. The physicochemical properties of the powders are studied using the X-ray diffraction, DSC/TG, and sorption methods. The Vickers microhardness of the ceramic samples sintered in the temperature range of 1000–1300°C is measured. A Russian patent was obtained for the method of synthesizing composites based on LaPO4. Mineral-like matrices based on the LaPO4–ZrSiO4 system are intended to be used for the immobilization and disposal of individual isotopes of the actinide–rare earth fraction of high-level waste (HLW).","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":"50 3","pages":"286 - 294"},"PeriodicalIF":0.8,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142976345","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}

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Study of the Processes of Non-Stoichiometric Compositions Based on CsSiB3O7 基于CsSiB3O7的非化学计量组成过程研究

IF 0.8 4区材料科学

Glass Physics and Chemistry Pub Date : 2025-01-13 DOI: 10.1134/S1087659624600704

E. S. Derkacheva, D. S. Ershov

引用次数: 0