Pub Date : 2024-03-08DOI: 10.1134/s108765962360093x
L. P. Mezentseva, M. V. Keskinova, A. V. Osipov, M. M. Sychov
Abstract
To prepare 0.5LaPO4–0.5ZrO2 and 0.5LaPO4–0.5Y2O3 ceramic composites, a microwave assisted sol-gel procedure for the synthesis of nanosized 0.5LaPO4·nH2O–0.5ZrO(OH)2 and 0.5LaPO4· nH2O–0.5Y(OH)3 precursor powders was developed. Ceramic composites were prepared by microwave sintering of powders at 1100°C after preliminary heat treatment of precursor powders at 850°C, as well as by conventional stepwise sintering at 1000, 1100 and 1200°C for 24 h. The unit cell parameters of monoclinic LaPO4 were calculated depending on sintering method and temperature. The values of specific surface area of the samples, Vickers microhardness, and thermal conductivity were determined; fracture surface of ceramic samples was studied. Such a complex study of 0.5LaPO4–0.5ZrO2 and 0.5LaPO4–0.5Y2O3 composites is presented for the first time. The influence of sintering method, temperature and addition of zirconia and yttria to LaPO4 on the resulting composite’s properties, phase composition and type of ceramic fracture surface is discussed.
{"title":"Fabrication of Ceramic Composites by Microwave Sintering","authors":"L. P. Mezentseva, M. V. Keskinova, A. V. Osipov, M. M. Sychov","doi":"10.1134/s108765962360093x","DOIUrl":"https://doi.org/10.1134/s108765962360093x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>To prepare 0.5LaPO<sub>4</sub>–0.5ZrO<sub>2</sub> and 0.5LaPO<sub>4</sub>–0.5Y<sub>2</sub>O<sub>3</sub> ceramic composites, a microwave assisted sol-gel procedure for the synthesis of nanosized 0.5LaPO<sub>4</sub>·<i>n</i>H<sub>2</sub>O–0.5ZrO(OH)<sub>2</sub> and 0.5LaPO<sub>4</sub>· <i>n</i>H<sub>2</sub>O–0.5Y(OH)<sub>3</sub> precursor powders was developed. Ceramic composites were prepared by microwave sintering of powders at 1100°C after preliminary heat treatment of precursor powders at 850°C, as well as by conventional stepwise sintering at 1000, 1100 and 1200°C for 24 h. The unit cell parameters of monoclinic LaPO<sub>4</sub> were calculated depending on sintering method and temperature. The values of specific surface area of the samples, Vickers microhardness, and thermal conductivity were determined; fracture surface of ceramic samples was studied. Such a complex study of 0.5LaPO<sub>4</sub>–0.5ZrO<sub>2</sub> and 0.5LaPO<sub>4</sub>–0.5Y<sub>2</sub>O<sub>3</sub> composites is presented for the first time. The influence of sintering method, temperature and addition of zirconia and yttria to LaPO<sub>4</sub> on the resulting composite’s properties, phase composition and type of ceramic fracture surface is discussed.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140074768","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}
Pub Date : 2024-03-08DOI: 10.1134/s1087659623600990
A. P. Shablinskii, R. S. Bubnova, A. V. Povolotskii, S. K. Filatov
Abstract
Thermal expansion of SrBi2B2O7 borate was investigated by in situ powder X-ray diffraction in the temperature range from –175 to 25°C. Compositional deformations of Sr1 – xBaxBi2B2O7 solid solutions were calculated. The band gaps for solid solutions were determined by the absorption spectroscopy. A similarity of thermal and compositional deformations has been established. These deformations were compared with the crystal structure of Sr1 – xBaxBi2B2O7 solid solutions.
{"title":"Compositional Deformations, Absorption Spectroscopy, and Low-Temperature X-Ray Diffraction of Sr1 – xBaxBi2B2O7 Solid Solutions","authors":"A. P. Shablinskii, R. S. Bubnova, A. V. Povolotskii, S. K. Filatov","doi":"10.1134/s1087659623600990","DOIUrl":"https://doi.org/10.1134/s1087659623600990","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Thermal expansion of SrBi<sub>2</sub>B<sub>2</sub>O<sub>7</sub> borate was investigated by in situ powder X-ray diffraction in the temperature range from –175 to 25°C. Compositional deformations of Sr<sub>1 – <i>x</i></sub>Ba<sub><i>x</i></sub>Bi<sub>2</sub>B<sub>2</sub>O<sub>7</sub> solid solutions were calculated. The band gaps for solid solutions were determined by the absorption spectroscopy. A similarity of thermal and compositional deformations has been established. These deformations were compared with the crystal structure of Sr<sub>1 – <i>x</i></sub>Ba<sub><i>x</i></sub>Bi<sub>2</sub>B<sub>2</sub>O<sub>7</sub> solid solutions.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140074770","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}
Pub Date : 2024-03-08DOI: 10.1134/s1087659623601041
Yu. S. Tver’yanovich
Abstract
A method is proposed for calculating the temperature dependence of the microhardness of glass in the temperature range from absolute zero to the glass transition temperature. According to the model underlying the calculation, the glass passes into a plastic state not only under the action of temperature but also under the action of mechanical stresses above the critical value corresponding to microhardness. Therefore, under the simultaneous action of these two factors, the glass passes into a plastic state if the sum of the thermal and mechanical energy of the glass mesh exceeds the critical value. The proposed calculation method is tested on the example of organic glass and two of the most important oxide glasses for practice: fused quartz and industrial alkali-silicate glass (soda-lime-silica glass (SLSG).
{"title":"Temperature Dependence of Glass Microhardness","authors":"Yu. S. Tver’yanovich","doi":"10.1134/s1087659623601041","DOIUrl":"https://doi.org/10.1134/s1087659623601041","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A method is proposed for calculating the temperature dependence of the microhardness of glass in the temperature range from absolute zero to the glass transition temperature. According to the model underlying the calculation, the glass passes into a plastic state not only under the action of temperature but also under the action of mechanical stresses above the critical value corresponding to microhardness. Therefore, under the simultaneous action of these two factors, the glass passes into a plastic state if the sum of the thermal and mechanical energy of the glass mesh exceeds the critical value. The proposed calculation method is tested on the example of organic glass and two of the most important oxide glasses for practice: fused quartz and industrial alkali-silicate glass (soda-lime-silica glass (SLSG).</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140074908","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}
Pub Date : 2024-03-08DOI: 10.1134/s1087659623600953
N. V. Besprozvannykh, D. S. Ershov, N. A. Morozov, L. N. Kurilenko, S. K. Kuchaeva, O. Yu. Sinel’shchikova
Abstract
The interaction of an aqueous solution of strontium nitrate with magnesium-doped potassium titanate nanotubes synthesized by coprecipitation followed by hydrothermal treatment is studied. It is found that after 2 h of exposure in the solution at room temperature, the composition with the replacement of 10 at % titanium by magnesium showed the greatest sorption capacity. The results obtained show the promise of using magnesium-doped potassium titanate nanotubes as adsorbents of strontium ions from aqueous solutions.
{"title":"Sorption of Strontium Ions on Potassium-Titanate Nanotubes Doped with Magnesium","authors":"N. V. Besprozvannykh, D. S. Ershov, N. A. Morozov, L. N. Kurilenko, S. K. Kuchaeva, O. Yu. Sinel’shchikova","doi":"10.1134/s1087659623600953","DOIUrl":"https://doi.org/10.1134/s1087659623600953","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The interaction of an aqueous solution of strontium nitrate with magnesium-doped potassium titanate nanotubes synthesized by coprecipitation followed by hydrothermal treatment is studied. It is found that after 2 h of exposure in the solution at room temperature, the composition with the replacement of 10 at % titanium by magnesium showed the greatest sorption capacity. The results obtained show the promise of using magnesium-doped potassium titanate nanotubes as adsorbents of strontium ions from aqueous solutions.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140075139","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}
Pub Date : 2024-03-08DOI: 10.1134/s108765962360103x
A. F. Dresvyannikov, E. V. Petrova, L. I. Kashfrazyeva, A. I. Khairullina
Abstract
The scientific bases for the synthesis of precursors of nanostructured Al2O3–ZrO2–MxOy (M = La, Y, Ce) oxide systems are developed. The features of the formation of precursors of such systems under conditions of rapid mixing of electrically generated reagents, implemented in a diaphragmless coaxial electrolyzer reactor, are studied. Using the methods of potentiodynamic polarization curves, X-ray diffractometry, X-ray fluorescence, synchronous thermal analysis, and laser diffraction, the anodic processes occurring in the electrolyzer and the morphology of particles formed in solution and transformed during heat treatment, as well as the phase, granulometric, and elemental compositions of precursors and oxide systems, are studied. The proposed approach makes it possible to obtain oxide systems modified with rare earth elements based on the Al2O3–ZrO2 binary system, characterized by the presence of a tetragonal zirconium dioxide phase in them.
{"title":"Synthesis of Precursors of Complex Oxide Systems Al2O3–ZrO2–MxOy (M = La, Y, Ce) Using Electrogenerated Reagents and Their Physical and Chemical Properties","authors":"A. F. Dresvyannikov, E. V. Petrova, L. I. Kashfrazyeva, A. I. Khairullina","doi":"10.1134/s108765962360103x","DOIUrl":"https://doi.org/10.1134/s108765962360103x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The scientific bases for the synthesis of precursors of nanostructured Al<sub>2</sub>O<sub>3</sub>–ZrO<sub>2</sub>–M<sub><i>x</i></sub>O<sub><i>y</i></sub> (M = La, Y, Ce) oxide systems are developed. The features of the formation of precursors of such systems under conditions of rapid mixing of electrically generated reagents, implemented in a diaphragmless coaxial electrolyzer reactor, are studied. Using the methods of potentiodynamic polarization curves, X-ray diffractometry, X-ray fluorescence, synchronous thermal analysis, and laser diffraction, the anodic processes occurring in the electrolyzer and the morphology of particles formed in solution and transformed during heat treatment, as well as the phase, granulometric, and elemental compositions of precursors and oxide systems, are studied. The proposed approach makes it possible to obtain oxide systems modified with rare earth elements based on the Al<sub>2</sub>O<sub>3</sub>–ZrO<sub>2</sub> binary system, characterized by the presence of a tetragonal zirconium dioxide phase in them.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140885168","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}
Pub Date : 2024-03-08DOI: 10.1134/s1087659623601028
V. Ya. Shevchenko, G. D. Ilyushin
Abstract
Using computer methods (the ToposPro software program), a combinatorial-topological analysis and modeling of the self-assembly of crystal structures of the Sr12Mg20Ge20-oP52 (a = 21.707 Å, b = 4.483 Å, c = 18.456 Å, V = 1795.88 Å3, Pnma), Sr2LiInGe2-oP24 (a = 7.503, b = 4.619, c = 17.473 Å, V = 605.63 Å3, Pnma), and Sr2Mg2Ge2-oP12 (a = 10.882 Å, c = 5.665 Å, V = 670.8 Å3, Pnma) families is carried out. For the crystal structure of Sr12Mg20Ge20-oP52, 17 variants of the cluster representation of a 3D atomic grid with 2 (5 variants), 3 (6 variants), and 4 (6 variants) structural units are established. The variant of the self-assembly involving the triple rings K3 = 0@3(SrMgGe) and K3 = 0@3(Mg2Ge) and double tetrahedra K6 = 0@6(Sr2Mg2Ge2) with symmetry –1, forming a suprapolyhedral cluster-trimer A from clusters (SrMgGe)(Sr2Mg2Ge2)(SrMgGe) and the cluster trimer B from clusters (Mg2Ge)(Sr2Mg2Ge2)(Mg2Ge), is considered. For the crystal structure (Sr2Li)2(InGe2)2-oP24, framework-forming polyhedra in the form of double tetrahedra K6 = 0@6(Sr2Mg2Ge2) and triple rings K3 = 0@3(SrMgGe) are defined. For the crystal structure of Sr2Mg2Ge2-oP12, the framework-forming polyhedra are defined in the form of double tetrahedra K6 = 0@6(Sr2Mg2Ge2). The symmetry and topological code of the processes of self-assembly of 3D structures from clusters-precursors has been reconstructed in the following form: primary chain → layer → framework.
{"title":"Cluster Self-Organization of Intermetallic Systems: New Clusters-Precursors K6 and K3 for the Crystal Structures of the Sr12Mg20Ge20-oP52, Sr2LiInGe2-oP24, and Sr2Mg2Ge2-oP12 Family","authors":"V. Ya. Shevchenko, G. D. Ilyushin","doi":"10.1134/s1087659623601028","DOIUrl":"https://doi.org/10.1134/s1087659623601028","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Using computer methods (the ToposPro software program), a combinatorial-topological analysis and modeling of the self-assembly of crystal structures of the Sr<sub>12</sub>Mg<sub>20</sub>Ge<sub>20</sub>-<i>oP</i>52 (<i>a</i> = 21.707 Å, <i>b</i> = 4.483 Å, c = 18.456 Å, V = 1795.88 Å<sup>3</sup>, <i>Pnma</i>), Sr<sub>2</sub>LiInGe<sub>2</sub>-<i>oP</i>24 (<i>a</i> = 7.503, <i>b</i> = 4.619, <i>c</i> = 17.473 Å, V = 605.63 Å<sup>3</sup>, <i>Pnma</i>), and Sr<sub>2</sub>Mg<sub>2</sub>Ge<sub>2</sub>-<i>oP</i>12 (<i>a</i> = 10.882 Å, <i>c</i> = 5.665 Å, V = 670.8 Å<sup>3</sup>, <i>Pnma</i>) families is carried out. For the crystal structure of Sr<sub>12</sub>Mg<sub>20</sub>Ge<sub>20</sub>-<i>oP</i>52, 17 variants of the cluster representation of a 3D atomic grid with 2 (5 variants), 3 (6 variants), and 4 (6 variants) structural units are established. The variant of the self-assembly involving the triple rings <i>K</i>3 = 0@3(SrMgGe) and <i>K</i>3 = 0@3(Mg<sub>2</sub>Ge) and double tetrahedra <i>K</i>6 = 0@6(Sr<sub>2</sub>Mg<sub>2</sub>Ge<sub>2</sub>) with symmetry –1, forming a suprapolyhedral cluster-trimer A from clusters (SrMgGe)(Sr<sub>2</sub>Mg<sub>2</sub>Ge<sub>2</sub>)(SrMgGe) and the cluster trimer B from clusters (Mg<sub>2</sub>Ge)(Sr<sub>2</sub>Mg<sub>2</sub>Ge<sub>2</sub>)(Mg<sub>2</sub>Ge), is considered. For the crystal structure (Sr<sub>2</sub>Li)<sub>2</sub>(InGe<sub>2</sub>)<sub>2</sub>-<i>oP</i>24, framework-forming polyhedra in the form of double tetrahedra <i>K</i>6 = 0@6(Sr<sub>2</sub>Mg<sub>2</sub>Ge<sub>2</sub>) and triple rings <i>K</i>3 = 0@3(SrMgGe) are defined. For the crystal structure of Sr<sub>2</sub>Mg<sub>2</sub>Ge<sub>2</sub>-<i>oP</i>12, the framework-forming polyhedra are defined in the form of double tetrahedra <i>K</i>6 = 0@6(Sr<sub>2</sub>Mg<sub>2</sub>Ge<sub>2</sub>). The symmetry and topological code of the processes of self-assembly of 3D structures from clusters-precursors has been reconstructed in the following form: primary chain → layer → framework.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140885170","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}
Pub Date : 2024-03-08DOI: 10.1134/s1087659623601065
M. A. Gavrilova, D. A. Gavrilova, A. A. Shelemanov, S. K. Evstrop’ev
Abstract
This study examines the features of the morphology and properties of disperse ZnO powders obtained by polymer-salt synthesis using polyvinylpyrrolidone (PVP). The processes of the thermal evolution of materials during the synthesis of powders are studied by differential thermal and thermogravimetric analysis. The crystal structure and morphology, as well as the luminescent and adsorption properties, of the synthesized nanopowders are studied by X-ray diffraction and electron microscopy analysis, as well as optical and luminescence spectroscopy. It is established that the addition of PVP reduces the size of the formed ZnO crystals and has a significant effect on the morphology, as well as the luminescent and adsorption properties, of the materials.
摘要 本研究探讨了使用聚乙烯吡咯烷酮（PVP）通过聚合物-盐合成法获得的分散氧化锌粉末的形貌和性能特征。通过差热分析和热重分析研究了粉末合成过程中材料的热演化过程。通过 X 射线衍射和电子显微镜分析以及光学和发光光谱分析，研究了合成纳米粉体的晶体结构和形态以及发光和吸附特性。结果表明，添加 PVP 会减小形成的氧化锌晶体的尺寸，并对材料的形貌、发光和吸附特性产生显著影响。
{"title":"Features of the Morphology and Properties of Disperse ZnO Powders, Obtained by Polymer-Salt Synthesis Using Polyvinylpyrrolidone","authors":"M. A. Gavrilova, D. A. Gavrilova, A. A. Shelemanov, S. K. Evstrop’ev","doi":"10.1134/s1087659623601065","DOIUrl":"https://doi.org/10.1134/s1087659623601065","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>This study examines the features of the morphology and properties of disperse ZnO powders obtained by polymer-salt synthesis using polyvinylpyrrolidone (PVP). The processes of the thermal evolution of materials during the synthesis of powders are studied by differential thermal and thermogravimetric analysis. The crystal structure and morphology, as well as the luminescent and adsorption properties, of the synthesized nanopowders are studied by X-ray diffraction and electron microscopy analysis, as well as optical and luminescence spectroscopy. It is established that the addition of PVP reduces the size of the formed ZnO crystals and has a significant effect on the morphology, as well as the luminescent and adsorption properties, of the materials.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140885166","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}
Pub Date : 2024-03-08DOI: 10.1134/s1087659623601004
V. Ya. Shevchenko, A. S. Oryshchenko, V. N. Lepin, A. V. Lushnikov, S. M. Aldoshin, S. N. Perevislov, I. V. Lomonosov, A. S. Savinykh, G. V. Garkushin, S. V. Razorenov, V. M. Mochalova, A. V. Utkin, D. N. Nikolaev, V. B. Mintsev
Abstract
For the first time, a new ceramic “Ideal,” a diamond-silicon carbide composite obtained in the reaction-diffusion Turing process, which makes it possible to obtain materials with the optimal set of physical and mechanical properties, is studied. An elastic-brittle fracture related to the propagation of a shock wave in a two-component system is noted. The dynamic elastic limit, determined by the properties of silicon carbide, is found to be 13.4 GPa. Its dynamic elastic limit and spall strength in the region of the elastic deformation are measured. The impact compressibility of ceramics up to a pressure of 625 GPa is determined.
{"title":"Measurement of the Hugoniot Elastic Limit in Ideal Ceramics","authors":"V. Ya. Shevchenko, A. S. Oryshchenko, V. N. Lepin, A. V. Lushnikov, S. M. Aldoshin, S. N. Perevislov, I. V. Lomonosov, A. S. Savinykh, G. V. Garkushin, S. V. Razorenov, V. M. Mochalova, A. V. Utkin, D. N. Nikolaev, V. B. Mintsev","doi":"10.1134/s1087659623601004","DOIUrl":"https://doi.org/10.1134/s1087659623601004","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>For the first time, a new ceramic “Ideal,” a diamond-silicon carbide composite obtained in the reaction-diffusion Turing process, which makes it possible to obtain materials with the optimal set of physical and mechanical properties, is studied. An elastic-brittle fracture related to the propagation of a shock wave in a two-component system is noted. The dynamic elastic limit, determined by the properties of silicon carbide, is found to be 13.4 GPa. Its dynamic elastic limit and spall strength in the region of the elastic deformation are measured. The impact compressibility of ceramics up to a pressure of 625 GPa is determined.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140074895","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}
Pub Date : 2024-03-08DOI: 10.1134/s1087659623600862
A. S. Saratovskii, M. A. Girsova, I. N. Anfimova, A. V. Moskalev, E. S. Motailo, T. V. Antropova
Abstract
A methodology is developed and ZnO nanoparticles are synthesized in porous glasses. The synthesis is carried out by impregnating silicate porous glasses in an aqueous solution of zinc nitrate and its subsequent thermolysis. The spectral and luminescent properties of the synthesized composites are studied. The ability of ZnO nanoparticles formed in porous glass to produce reactive oxygen species under UV irradiation is studied.
{"title":"Influence of Modification of Porous Glass with Zinc Oxide on Its Photocatalytic Properties","authors":"A. S. Saratovskii, M. A. Girsova, I. N. Anfimova, A. V. Moskalev, E. S. Motailo, T. V. Antropova","doi":"10.1134/s1087659623600862","DOIUrl":"https://doi.org/10.1134/s1087659623600862","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A methodology is developed and ZnO nanoparticles are synthesized in porous glasses. The synthesis is carried out by impregnating silicate porous glasses in an aqueous solution of zinc nitrate and its subsequent thermolysis. The spectral and luminescent properties of the synthesized composites are studied. The ability of ZnO nanoparticles formed in porous glass to produce reactive oxygen species under UV irradiation is studied.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140074898","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}
Pub Date : 2024-03-08DOI: 10.1134/s1087659623600989
A. V. Zdravkov, Yu. S. Kudryashova, R. Sh. Abiev, N. N. Khimich
Abstract
Nanosized yttrium–aluminum garnet (YAG) powders are synthesized in a microreactor with swirling flows by the coprecipitation of yttrium and aluminum hydroxides followed by heat treatment. The resulting mixture of hydroxides is X-ray amorphous according to X-ray phase analysis. Thermal treatment of hydroxides at 1100°C for 1 h leads to the formation of Y3Al5O12 nanocrystals. The method we developed is technologically advanced, easily scalable, saves energy and time, and does not require labor-intensive operati-ons.
摘要 纳米钇铝石榴石（YAG）粉末是通过钇和铝的氢氧化物共沉淀，然后进行热处理，在漩涡流的微反应器中合成的。根据 X 射线相分析，所得氢氧化物混合物为 X 射线非晶体。在 1100°C 下对氢氧化物进行 1 小时的热处理，可形成 Y3Al5O12 纳米晶体。我们开发的方法技术先进，易于扩展，节省能源和时间，并且不需要劳动密集型操作。
{"title":"Synthesis of Yttrium–Aluminum Garnet Precursors in a Microreactor with Swirling Flows","authors":"A. V. Zdravkov, Yu. S. Kudryashova, R. Sh. Abiev, N. N. Khimich","doi":"10.1134/s1087659623600989","DOIUrl":"https://doi.org/10.1134/s1087659623600989","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Nanosized yttrium–aluminum garnet (YAG) powders are synthesized in a microreactor with swirling flows by the coprecipitation of yttrium and aluminum hydroxides followed by heat treatment. The resulting mixture of hydroxides is X-ray amorphous according to X-ray phase analysis. Thermal treatment of hydroxides at 1100°C for 1 h leads to the formation of Y<sub>3</sub>Al<sub>5</sub>O<sub>12</sub> nanocrystals. The method we developed is technologically advanced, easily scalable, saves energy and time, and does not require labor-intensive operati-ons.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140885232","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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