Inorganic Materials最新文献_第6页

Ion Beam and Plasma Modification of Carbon Nanomaterials for Electrochemical Applications

IF 0.9 4区材料科学

Inorganic Materials Pub Date : 2025-03-13 DOI: 10.1134/S0020168524701231

P. M. Korusenko, E. V. Beletskii, O. V. Levin, K. A. Kharisova, D. A. Luk’yanov, A. A. Vereshchagin, E. V. Alekseeva

引用次数: 0

Methods for Synthesis of PbIn1/2Ta1/2O3 with the Perovskite Structure

IF 0.9 4区材料科学

Inorganic Materials Pub Date : 2025-03-13 DOI: 10.1134/S002016852470122X

A. A. Gusev, I. P. Raevski

{"title":"Methods for Synthesis of PbIn1/2Ta1/2O3 with the Perovskite Structure","authors":"A. A. Gusev, I. P. Raevski","doi":"10.1134/S002016852470122X","DOIUrl":"10.1134/S002016852470122X","url":null,"abstract":"We have studied the effect of mechanical activation on the synthesis of lead indium tantalate and the formation of the perovskite and pyrochlore phases during both mechanochemical synthesis and subsequent firing. To reduce the electrical conductivity of resulting ceramics, lithium carbonate was added to starting mixtures, which is known to stabilize the perovskite structure. PbIn1/2Ta1/2O3 samples were prepared in the presence of 1–3 wt % superstoichiometric lithium carbonate at firing times from 30 min to 2 h. We have found conditions that ensure the preparation of single-phase material with the perovskite structure in the presence of lithium carbonate additions at different firing temperatures. The sequence in which reagents are introduced into the starting mixture and their activation have been shown to have a significant effect on the synthesis of the tantalate and the formation of the perovskite phase. We have compared a number of sample preparation procedures differing in mechanical activation conditions and the way in which the starting materials are introduced. Optimal conditions have been found which ensure the preparation of piezoceramics containing the maximum amount of the perovskite phase and having the highest density.","PeriodicalId":585,"journal":{"name":"Inorganic Materials","volume":"60 8","pages":"970 - 975"},"PeriodicalIF":0.9,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143602338","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

Synthesis, Properties, and Antibacterial Activity of Zinc-Substituted Hydroxyapatite

IF 0.9 4区材料科学

Inorganic Materials Pub Date : 2025-03-13 DOI: 10.1134/S0020168524701243

M. V. Papezhuk, C. N. Ivanin, V. A. Volynkin, P. P. Yakupov, L. V. Vasil’eva

{"title":"Synthesis, Properties, and Antibacterial Activity of Zinc-Substituted Hydroxyapatite","authors":"M. V. Papezhuk, C. N. Ivanin, V. A. Volynkin, P. P. Yakupov, L. V. Vasil’eva","doi":"10.1134/S0020168524701243","DOIUrl":"10.1134/S0020168524701243","url":null,"abstract":"Hydroxyapatite (HA) and zinc-substituted hydroxyapatite (ZnHA) have been prepared via precipitation from solution. The lattice parameters of ZnHA (а, b = 9.41766 Å, с = 6.88048 Å) are about 0.001 Å smaller than those of HA (а, b = 9.41866 Å, с = 6.88158 Å). The change in the lattice parameters of the ZnHA studied confirms partial Zn2+ substitution for Ca2+ in the crystal lattice of hydroxyapatite. IR spectra indicated the presence of functional groups (OH– and ({text{PO}}_{4}^{{3 - }})) in the composition of HA. According to scanning electron microscopy data, the particle size of the ZnHA powder prepared via precipitation followed by heat treatment at 900°C is 200–400 nm. Energy dispersive X-ray microanalysis was used to determine the Ca/P and (Ca + Zn)/P ratios in HA and ZnHA: 1.68 and 1.66, respectively. The solubility of ZnHA in physiological saline was found to be twice that of HA, suggesting good ZnHA resorption in the human body. Tests of disk-shaped samples in SBF solution demonstrated active formation of a new calcium phosphate layer as a result of chemisorption of Ca2+, Mg2+, ({text{HPO}}_{4}^{{2 - }}), ({text{PO}}_{4}^{{3 - }}), and OH– ions from solution. ZnHA exhibits activity for both gram positive (Bacillus cereus and Staphylococcus aureus) and gram negative (Escherichia coli and Acinetobacter calcoaceticus) microorganisms.","PeriodicalId":585,"journal":{"name":"Inorganic Materials","volume":"60 8","pages":"1012 - 1022"},"PeriodicalIF":0.9,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143602286","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

TiO2-Based Coating Grown on Fabric by Magnetron Sputtering: Photoactive Properties of the Fabric

IF 0.9 4区材料科学

Inorganic Materials Pub Date : 2025-03-13 DOI: 10.1134/S0020168524701310

N. P. Prorokova, T. Yu. Kumeeva, B. L. Gorberg

引用次数: 0

Thermal Properties of Extrapure Glasses of the Ga15Ge10Te75–xIx System

IF 0.9 4区材料科学

Inorganic Materials Pub Date : 2025-03-13 DOI: 10.1134/S0020168524701279

D. O. Patrushev, A. M. Kut’in, A. D. Plekhovich, K. V. Balueva, A. P. Velmuzhov, E. A. Tyurina, I. I. Evdokimov, A. E. Kurganova

引用次数: 0

Effect of Composition on the Electrical Properties of (TlInS2)1–x(TlGaSe2)х Multicomponent Solid Solutions

IF 0.9 4区材料科学

Inorganic Materials Pub Date : 2025-03-13 DOI: 10.1134/S0020168524701292

S. N. Mustafaeva, S. M. Asadov, M. M. Gojaev

{"title":"Effect of Composition on the Electrical Properties of (TlInS2)1–x(TlGaSe2)х Multicomponent Solid Solutions","authors":"S. N. Mustafaeva, S. M. Asadov, M. M. Gojaev","doi":"10.1134/S0020168524701292","DOIUrl":"10.1134/S0020168524701292","url":null,"abstract":"We have synthesized the ternary compounds TlInS2 and TlGaSe2 and (TlInS2)1–x (TlGaSe2)х (x = 0.1, 0.2, 0.4) solid solutions. The phase composition and lattice parameters of their single crystals grown by directional solidification have been determined by X-ray diffraction. At room temperature, the crystals have a layered monoclinic structure with space group (C_{{2{text{h}}}}^{6}left( {C2{text{/}}c} right)). Their properties have been shown to vary systematically with composition. The real (ε') and imaginary (ε″) parts of the complex dielectric permittivity, dielectric loss tangent (tan δ), and ac conductivity (σac) of the single-crystal TlInS2-based solid solutions have been measured as functions of frequency across the layers of the crystals. Their dielectric properties have been measured by a resonance technique at ac electric field frequencies f = 5 × 104 to 3.5 × 107 Hz. The observed hyperbolic decrease in tan δ with increasing frequency suggests that the solid solutions have conductivity losses. We have identified the hopping mechanism of charge transport in (TlInS2)1–x(TlGaSe2)х and determined parameters of localized states in the band gap of the crystals: Fermi-level density of localized states (NF = 5.8 × 1018 to 1.9 × 1019 eV–1 cm–3), mean hop time (τ = 2 × 10–7 s), mean hop distance (R = 86 Å), and the energy spread of the states localized in the vicinity of the Fermi level (ΔE = 47 meV). The parameters ε', ε″, tan δ, and σac of the (TlInS2)1–x(TlGaSe2)х (x = 0.1, 0.2, 0.4) single crystals have been shown to increase with increasing TlGaSe2 content.","PeriodicalId":585,"journal":{"name":"Inorganic Materials","volume":"60 8","pages":"1002 - 1011"},"PeriodicalIF":0.9,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143602287","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

A Method for Calculating the Composition of a Heterophase Low-Temperature Plasma with Analysis of CO2 Conversion under the Effect of Gyrotron Radiation

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}

引用次数: 0

PbIn1/2Ta1/2O3 Synthesis Methods

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

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

Effect of Gamma Irradiation on the Electrical Properties of Extruded Bi0.85Sb0.15 Solid Solution Samples Doped with Pb Acceptor Impurities