Inorganic Materials最新文献_第9页

A Method for Calculating the Composition of a Heterophase Low-Temperature Plasma with Analysis of CO2 Conversion under the Effect of Gyrotron Radiation 一种计算异相低温等离子体成分的方法及回旋管辐射作用下CO2转化的分析

IF 0.9 4区材料科学

Inorganic Materials Pub Date : 2025-03-11 DOI: 10.1134/S0020168524701206

A. M. Kut’in, D. A. Mansfeld, V. S. Polyakov

{"title":"A Method for Calculating the Composition of a Heterophase Low-Temperature Plasma with Analysis of CO2 Conversion under the Effect of Gyrotron Radiation","authors":"A. M. Kut’in, D. A. Mansfeld, V. S. Polyakov","doi":"10.1134/S0020168524701206","DOIUrl":"10.1134/S0020168524701206","url":null,"abstract":"Known calculational implementations of the extremum principle of chemical thermodynamics, which are used to analyze equilibrium plasmas, are extended to description of nonequilibrium steady states of a low-temperature plasma (LTP) with the use of a physical model for the excess of energy in partially independent subsystems (electronic and vibrational) with temperatures Te and Tv relative to T. At a statistical level, we introduce “multitemperature” functions of LTP components, which make it possible, in the framework of the Gibbs energy minimization method, to predict conditions of formation of condensed substances (materials) from the LTP. The simulation results on the composition of a nonisothermal microwave gyrotron plasma in a CO2 + Ar mixture, with the use of an experimentally determined electron temperature, Te = 0.7 eV = 8120 K, confirm the 30% CO2 conversion reached in practice at T = 1900 K; that is, the CO2 splitting temperature is approximately 700 K lower than that calculated for a thermal plasma. The calculated plasma composition agrees with experimental data, and Ar plasma gas is shown to influence characteristics of the plasma and CO2 splitting conditions. In addition, the simulation results predict that the CO2 splitting products contain no condensed carbon.","PeriodicalId":585,"journal":{"name":"Inorganic Materials","volume":"60 7","pages":"933 - 938"},"PeriodicalIF":0.9,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143583504","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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Effect of Gamma Irradiation on the Electrical Properties of Extruded Bi0.85Sb0.15 Solid Solution Samples Doped with Pb Acceptor Impurities γ辐照对掺杂铅受体杂质的Bi0.85Sb0.15固溶挤压样品电性能的影响

IF 0.9 4区材料科学

Inorganic Materials Pub Date : 2025-03-11 DOI: 10.1134/S0020168524701024

M. M. Tagiyev, I. A. Abdullayeva, G. D. Abdinova

引用次数: 0

Interaction of Nitrogen with Aluminum Oxide during Melt Growth of Corundum Crystals 刚玉晶体熔体生长过程中氮与氧化铝的相互作用

IF 0.9 4区材料科学

Inorganic Materials Pub Date : 2025-03-11 DOI: 10.1134/S0020168524701140

D. V. Kostomarov, V. A. Fedorov

{"title":"Interaction of Nitrogen with Aluminum Oxide during Melt Growth of Corundum Crystals","authors":"D. V. Kostomarov, V. A. Fedorov","doi":"10.1134/S0020168524701140","DOIUrl":"10.1134/S0020168524701140","url":null,"abstract":"We examine possible interaction of molten aluminum oxide with a controlled (nitrogen) atmosphere in the pressure range 104 to 105 Pa at a temperature of 2400 K. Stochastic simulation is used to identify gas phase components and determine their concentration. We analyze the main chemical reactions that determine processes in the system. The results suggest that, even though neither molecular, nor atomic nitrogen directly interacts with molten aluminum oxide in the conditions under consideration, it is capable of entering into many chemical reactions in the form of its oxides or together with Al-containing dissociative melt vaporization products. We have calculated pressure ranges where the reactions under consideration and reverse reactions—aluminum oxide formation and precipitation in the melt—are possible on account of gas phase processes. Analysis of these processes makes it possible to optimize conditions for the use of nitrogen as a controlled atmosphere, the most important of which is to reduce the concentration of (atomic and molecular) oxygen and that of AlO2 oxidizing oxide, which destroy the material of crystal growth system.","PeriodicalId":585,"journal":{"name":"Inorganic Materials","volume":"60 7","pages":"928 - 932"},"PeriodicalIF":0.9,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143583377","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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PbIn1/2Ta1/2O3 Synthesis Methods PbIn1/2Ta1/2O3合成方法

IF 0.9 4区材料科学

Inorganic Materials Pub Date : 2025-03-11 DOI: 10.1134/S0020168524701152

A. A. Gusev, I. P. Raevski

引用次数: 0

Preparation of Glass-Ceramics via Impregnation of Erbium-Doped Yttrium Aluminum Garnet with Molten BaO–B2O3–Bi2O3 Glass 用熔融BaO-B2O3-Bi2O3玻璃浸渍掺铒钇铝石榴石制备微晶玻璃

IF 0.9 4区材料科学

Inorganic Materials Pub Date : 2025-03-11 DOI: 10.1134/S002016852470105X

A. D. Plekhovich, A. M. Kut’in, E. E. Rostokina, K. V. Balueva, M. E. Komshina, K. F. Shumovskaya, I. I. Evdokimov, S. V. Kurashkin, E. N. Razov

引用次数: 0

Fused Silica Container Material with Al2O3 Nanofiber Additions for Semiconductor Technologies 半导体技术中添加Al2O3纳米纤维的熔融硅容器材料

IF 0.9 4区材料科学

Inorganic Materials Pub Date : 2025-03-11 DOI: 10.1134/S0020168524701085

E. Yu. Podshibyakina, A. F. Shimanskii, M. N. Vasil’eva, M. M. Simunin, R. G. Eromasov, T. V. Bermeshev

引用次数: 0

Synthesis of γ-La2S3 via Treatment of La2O3 by Molten Sodium Thiocyanate with Potassium Cyanide Additions 熔融硫氰酸钠加氰化钾处理La2O3合成γ-La2S3

IF 0.9 4区材料科学

Inorganic Materials Pub Date : 2025-03-11 DOI: 10.1134/S0020168524701188

A. A. Kapustin, A. N. Romanov, E. V. Haula, V. N. Korchak

引用次数: 0

Thermodynamic Modeling of the Impact of Impurities and NaCl Additives on the Chemical Composition of Silicon Carbide Synthesis Products by the Acheson Method 用Acheson法模拟杂质和NaCl添加剂对碳化硅合成产物化学组成影响的热力学模型

IF 0.9 4区材料科学

Inorganic Materials Pub Date : 2025-03-11 DOI: 10.1134/S0020168524701127

V. B. Shcherbakova, P. S. Grinchuk

引用次数: 0

Phase Equilibria in the LiF–KCl–KBr–LiKCrO4 Stable Tetrahedron of the Quinary Reciprocal System Li+,K+||F–,Cl–,Br–,({text{CrO}}_{4}^{{2 - }}) Li+，K+||稳定四面体Li+，K+ - kbr - likcro4的相平衡({text{CrO}}_{4}^{{2 - }})

IF 0.9 4区材料科学

Inorganic Materials Pub Date : 2025-03-11 DOI: 10.1134/S0020168524701115

M. A. Sukharenko, I. S. Portnova, A. S. Egorova, I. K. Garkushin, I. M. Kondratyuk

引用次数: 0

Preparation of Metal–Ceramic Coatings by Microplasma Spraying of Mechanochemically Synthesized Ti/HfB2 Composite Powders 微等离子喷涂机械化学合成Ti/HfB2复合粉末制备金属陶瓷涂层

IF 0.9 4区材料科学

Inorganic Materials Pub Date : 2025-03-11 DOI: 10.1134/S0020168524701164

M. E. Goshkoderya, T. I. Bobkova, N. A. Serdyuk, A. A. Kashirina, M. V. Staritsyn, M. V. Khromenkov

{"title":"Preparation of Metal–Ceramic Coatings by Microplasma Spraying of Mechanochemically Synthesized Ti/HfB2 Composite Powders","authors":"M. E. Goshkoderya, T. I. Bobkova, N. A. Serdyuk, A. A. Kashirina, M. V. Staritsyn, M. V. Khromenkov","doi":"10.1134/S0020168524701164","DOIUrl":"10.1134/S0020168524701164","url":null,"abstract":"This paper reports on the use of titanium/hafnium diboride composite powders for producing metal–ceramic coatings. The composite powders were prepared by high-energy mechanochemical synthesis. The starting components used were PTOM-1 titanium powder (as a matrix powder) and hafnium diboride powder (as a reinforcing agent). The composite powders were characterized by microstructural analysis and their particle size composition was determined. Examination of their morphology showed that the number of hafnium diboride particles embedded in the surface layer of the titanium particles increased with increasing reinforcing agent content in the mixture for mechanochemical synthesis. Assessment of the particle size composition of the powders showed that the size range 10–60 μm accounted for the largest volume fraction of the particles: from 7 to 10%. The microhardness of the coatings produced by microplasma spraying was determined using their transverse polished microsections. Scanning electron microscopy images showed that increasing the percentage of hafnium diboride in the starting mixtures increased the amount of HfB2 in the coatings. In all of the polished microsections examined, the coating was firmly adherent to the substrate material, without through pores. As the hafnium diboride content was raised from 10 to 60 wt %, the microhardness of the coatings increased in proportion to it. The composite powder containing 60 wt % hafnium diboride had the highest microhardness: 1076 HV.","PeriodicalId":585,"journal":{"name":"Inorganic Materials","volume":"60 7","pages":"920 - 927"},"PeriodicalIF":0.9,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143583373","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