Inorganic Materials最新文献_第9页

Synthesis and Thermodynamic Functions of Ruthenium Dichalcogenides in a Wide Temperature Range 二卤化钌在宽温度范围内的合成与热力学功能

IF 0.9 4区材料科学

Inorganic Materials Pub Date : 2024-03-11 DOI: 10.1134/S0020168523110146

A. V. Tyurin, D. A. Chareev, N. A. Polotnyanko, A. V. Khoroshilov, I. G. Puzanova, N. A. Zgurskiy

{"title":"Synthesis and Thermodynamic Functions of Ruthenium Dichalcogenides in a Wide Temperature Range","authors":"A. V. Tyurin, D. A. Chareev, N. A. Polotnyanko, A. V. Khoroshilov, I. G. Puzanova, N. A. Zgurskiy","doi":"10.1134/S0020168523110146","DOIUrl":"10.1134/S0020168523110146","url":null,"abstract":"Thermodynamic properties of polycrystalline powders of ruthenium dichalcogenides have been studied using calorimetric isobaric heat capacity measurements in a wide temperature range. The adiabatic and differential scanning calorimetry data for ruthenium disulfide and ruthenium diselenide have been used to determine standard thermodynamic functions (heat capacity, entropy, enthalpy increment, and reduced Gibbs energy) of these compounds in the range 10–965 K. At 298.15 K, the functions of RuS2 are as follows: (C_{p}^{^circ }) = 60.82 ± 0.12 J/(K mol), S° = 56.05 ± 0.11 J/(K mol), Н°(298.15 K) − Н°(0) = 9.75 ± 0.02 kJ/mol, and Ф° = 23.34 ± 0.05 J/(K mol). For RuSe2, we have obtained (C_{p}^{^circ }) = 69.96 ± 0.14 J/(K mol), S° = 80.62 ± 0.16 J/(K mol), Н°(298.15 K) − Н°(0) = 13.05 ± 0.03 kJ/mol, and Ф° = 36.85 ± 0.08 J/(K mol). The data obtained above 298 K have been used to determine empirical coefficients of the Maier–Kelley and Khodakovsky equations. The absolute entropies obtained in this study for the ruthenium dichalcogenides, in combination with literature data, have made it possible to evaluate the Gibbs energy of formation of RuS2(cr) and RuSe2(cr) at 298.15 K.","PeriodicalId":585,"journal":{"name":"Inorganic Materials","volume":"59 11","pages":"1230 - 1241"},"PeriodicalIF":0.9,"publicationDate":"2024-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140098002","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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Electronic Structure and X-Ray Absorption Near Edge Spectroscopy of Copper Oxides 氧化铜的电子结构和 X 射线吸收近边缘光谱学

IF 0.9 4区材料科学

Inorganic Materials Pub Date : 2024-03-10 DOI: 10.1134/S0020168523100114

V. R. Radina, M. D. Manyakin, S. I. Kurganskii

引用次数: 0

Polymorphism of High-Temperature Aluminothermic Synthesis Products in the Ni–Al–Co System Ni-Al-Co 系统中高温铝热合成产物的多态性

IF 0.9 4区材料科学

Inorganic Materials Pub Date : 2024-03-10 DOI: 10.1134/S0020168523100023

M. L. Busurina, V. A. Gorshkov, A. E. Sychev, O. D. Boyarchenko, I. D. Kovalev

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Purity Level of Titanium, Zirconium, and Hafnium (according to Materials in the Exhibition–Collection of Extrapure Substances) 钛、锆和铪的纯度（根据《展览材料-超纯物质集》）：钛、锆和铪的纯度（根据《展览材料-超纯物质集》）：钛、锆和铪的纯度（根据《展览材料-超纯物质集》）。

IF 0.9 4区材料科学

Inorganic Materials Pub Date : 2024-03-10 DOI: 10.1134/S0020168523100072

O. P. Lazukina, E. N. Volkova, K. K. Malyshev, M. F. Churbanov

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Synthesis and Characterization of a KBаLu(MoO4)3:Er3+/Yb3+ Upconversion Phosphor KBаLu(MoO4)3:Er3+/Yb3+ 上转换荧光粉的合成与表征

IF 0.9 4区材料科学

Inorganic Materials Pub Date : 2024-03-10 DOI: 10.1134/S0020168523100059

N. M. Kozhevnikova

引用次数: 0

Formation, Morphology, and Size Parameters of Nanopowders Based on Mg3Si2O5(OH)4–Ni3Si2O5(OH)4 Nanoscrolls 基于 Mg3Si2O5(OH)4-Ni3Si2O5(OH)4 纳米卷的纳米粉体的形成、形态和尺寸参数

IF 0.9 4区材料科学

Inorganic Materials Pub Date : 2024-03-10 DOI: 10.1134/S0020168523100060

M. E. Kurguzkina, T. P. Maslennikova, V. V. Gusarov

{"title":"Formation, Morphology, and Size Parameters of Nanopowders Based on Mg3Si2O5(OH)4–Ni3Si2O5(OH)4 Nanoscrolls","authors":"M. E. Kurguzkina, T. P. Maslennikova, V. V. Gusarov","doi":"10.1134/S0020168523100060","DOIUrl":"10.1134/S0020168523100060","url":null,"abstract":"We have studied the effect of the composition of starting Mg1 – хNiх(OH)2 nanoplates on the formation of (Mg1 – хNiх)3Si2O5(OH)4 nanoscrolls under hydrothermal conditions and determined the structure, morphology, size parameters, and specific surface area of the synthesized nanopowders based on (Mg1 – хNiх)3Si2O5(OH)4 hydrosilicates with the chrysotile structure. The thermodynamically driven dehydration of the starting (Mg1 – хNiх)(OH)2 hydroxide with х ≳ 0.4 during hydrothermal treatment of a mixture of magnesium nickel hydroxide nanoplates and silica gel (SiO2∙nH2O) particles dispersed in an aqueous sodium hydroxide solution has been shown to play a key role in determining the formation and structural characteristics of (Mg1 – хNiх)3Si2O5(OH)4 nanopowders with tubular structure.","PeriodicalId":585,"journal":{"name":"Inorganic Materials","volume":"59 10","pages":"1075 - 1084"},"PeriodicalIF":0.9,"publicationDate":"2024-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142411122","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

Anomalous Temperature Dependences of the Band Gap and Thermal Expansion Coefficients in AgInSe2 Single Crystals AgInSe2 单晶带隙和热膨胀系数的反常温度依赖性

IF 0.9 4区材料科学

Inorganic Materials Pub Date : 2024-03-10 DOI: 10.1134/S0020168523100084

A. Kh. Matiyev

引用次数: 0

Luminescence Properties of Tb3+- and Eu3+-Doped Lanthanum Magnesium Pentaborates 掺杂 Tb3+- 和 Eu3+ 的五硼酸镧镁的发光特性

IF 0.9 4区材料科学

Inorganic Materials Pub Date : 2024-03-10 DOI: 10.1134/S0020168523100096

D. D. Mitina, V. V. Maltsev, D. V. Deyneko, E. A. Volkova, E. V. Koporulina, N. N. Kuzmin, V. L. Kosorukov, A. I. Jiliaeva, D. A. Naprasnikov

引用次数: 0

Structural Features of Coatings Produced by Cladding with STIM-2/30 SHS Electrodes and T-590 Commercially Available Electrodes 用 STIM-2/30 SHS 电极和 T-590 市售电极堆焊生产的涂层的结构特征

IF 0.9 4区材料科学

Inorganic Materials Pub Date : 2024-03-10 DOI: 10.1134/S002016852310014X

A. O. Zhidovich, O. A. Averichev, A. S. Ivanov, S. V. Karpov

{"title":"Structural Features of Coatings Produced by Cladding with STIM-2/30 SHS Electrodes and T-590 Commercially Available Electrodes","authors":"A. O. Zhidovich, O. A. Averichev, A. S. Ivanov, S. V. Karpov","doi":"10.1134/S002016852310014X","DOIUrl":"10.1134/S002016852310014X","url":null,"abstract":"T-590 commercially available electrodes for wear-resistant claddings and STIM-2/30 electrodes prepared by self-propagating high-temperature synthesis (SHS) extrusion and containing reinforcing titanium carbide particles have been used to produce protective layers on the surface of steel by electric arc cladding. We have determined the phase composition and structure of the clad coatings. The results demonstrate that the microstructure of the coatings produced by cladding with the use of T-590 electrodes is formed by a carbide eutectic. The reinforcing TiC phase in the SHS electrodes has been shown to pass into the clad layer and be uniformly distributed across the entire clad layer, which is accompanied by the formation of an intermediate diffusion layer on the coating–substrate fusion interface. The hardness and microhardness of the clad coatings are a factor of 2–4 higher than those of the steel substrate. Cladding with the use of T-590 electrodes ensures higher hardness of the clad layers, but an increase in the percentage of ferrite in their structure can lead to a decrease in their wear resistance. The coatings produced by cladding with the use of SHS electrodes have a favorable structure capable of ensuring high abrasive wear resistance.","PeriodicalId":585,"journal":{"name":"Inorganic Materials","volume":"59 10","pages":"1155 - 1161"},"PeriodicalIF":0.9,"publicationDate":"2024-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142411125","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

Luminescence of Thioglycolic Acid-Passivated PbS Quantum Dots in the Presence of Potassium Iodide 碘化钾存在时硫代乙醇酸钝化铅锡量子点的发光特性

IF 0.9 4区材料科学

Inorganic Materials Pub Date : 2024-03-10 DOI: 10.1134/S0020168523100047

I. G. Grevtseva, K. S. Chirkov, O. V. Ovchinnikov, M. S. Smirnov

{"title":"Luminescence of Thioglycolic Acid-Passivated PbS Quantum Dots in the Presence of Potassium Iodide","authors":"I. G. Grevtseva, K. S. Chirkov, O. V. Ovchinnikov, M. S. Smirnov","doi":"10.1134/S0020168523100047","DOIUrl":"10.1134/S0020168523100047","url":null,"abstract":"In this paper, we discuss general trends in the IR luminescence of colloidal PbS quantum dots 3 nm in average size, capped with thioglycolic acid molecules (PbS/TGA QDs). Treatment of the PbS/TGA QDs with a KI solution has been shown to cause a shift of a composite luminescence band peaking at 1120 nm to shorter wavelengths, to 1060 nm; an increase in the quantum yield of its shorter wavelength component, related to excitonic emission, from 1 to 10%; and quenching of its longer wavelength component, due to radiative recombination at defect levels. In this process, the cubic structure of PbS undergoes no changes. The average size of the PbS/TGA QDs has been shown to decrease slightly, by 0.2–0.3 nm. The conclusion has been drawn that the increase in the quantum yield of excitonic emission from the PbS/TGA QDs as a result of KI treatment is due to the more efficient passivation of interfacial defects, which act as both recombination luminescence and nonradiative carrier recombination channels. Using thermoluminescence in the temperature range from 80 to 350 K, we have demonstrated the presence of two types of shallow localized states, at 0.17- and 0.25-eV depths, whose density is only slightly sensitive to treatment of the PbS/TGA QDs with a KI solution. We assume that some of the traps identified are due to native defects in the nanocrystals—interstitial lead and sulfur ions—rather than to dangling bonds of surface lead and sulfur atoms.","PeriodicalId":585,"journal":{"name":"Inorganic Materials","volume":"59 10","pages":"1045 - 1053"},"PeriodicalIF":0.9,"publicationDate":"2024-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142411126","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