Inorganic Materials最新文献_第8页

Homogeneous and Heterogeneous Mechanisms of Crystal Nucleation in Silver-Containing Lithium Silicate Glasses 含银硅酸锂玻璃晶体成核的均相和非均相机制

IF 0.9 4区材料科学

Inorganic Materials Pub Date : 2025-03-13 DOI: 10.1134/S0020168524701280

G. A. Sycheva

引用次数: 0

Effect of the Particle Size of the Components of CaWO4–Al2O3 Composites on Their Transport Properties CaWO4-Al2O3复合材料组分粒度对其输运性能的影响

IF 0.9 4区材料科学

Inorganic Materials Pub Date : 2025-03-13 DOI: 10.1134/S0020168524701218

A. F. Guseva, N. N. Pestereva, A. A. Tushkova, O. V. Russkikh, L. V. Adamova

{"title":"Effect of the Particle Size of the Components of CaWO4–Al2O3 Composites on Their Transport Properties","authors":"A. F. Guseva, N. N. Pestereva, A. A. Tushkova, O. V. Russkikh, L. V. Adamova","doi":"10.1134/S0020168524701218","DOIUrl":"10.1134/S0020168524701218","url":null,"abstract":"We have studied the effect of the grain size of aluminum oxide and calcium tungstate on the transport properties of (1 – x)СaWO4–xAl2O3 composites with a mole fraction of aluminum oxide x ≤ 0.35. The phase composition and thermodynamic stability of the composites were ascertained by X-ray diffraction, thermogravimetry, and differential scanning calorimetry. Their surface morphology was examined by electron microscopy and their elemental composition was determined by X-ray microanalysis. The electrical conductivity of the composites was determined by electrochemical impedance measurements and analyzed as a function of temperature, oxygen pressure in the gas phase, dispersoid (aluminum oxide) concentration, and the grain size of their components. The conductivity of the (1 – x)СaWO4–xAl2O3 composites containing 5–10 mol % aluminum oxide was found to exceed that of CaWO4 by more than one order of magnitude. Varying the average grain size of the Al2O3 nanopowder from 21 to 82 nm caused no appreciable changes in the conductivity of the composites, which was due to the polydispersity of the aluminum oxide, whereas reducing the average grain size of CaWO4 from 6.4 to 1.6 μm led to a twofold increase in the conductivity of the composites.","PeriodicalId":585,"journal":{"name":"Inorganic Materials","volume":"60 8","pages":"983 - 993"},"PeriodicalIF":0.9,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143602335","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

Structure and Magnetic Properties of Eu1–xSrxMnO3 (x = 0.0, 0.25) Manganites Eu1-xSrxMnO3 （x = 0.0, 0.25）锰矿石的结构和磁性能

IF 0.9 4区材料科学

Inorganic Materials Pub Date : 2025-03-13 DOI: 10.1134/S0020168524701255

O. M. Fedorova, L. B. Vedmid’, S. A. Uporov

引用次数: 0

Synthesis and Characterization of a KSrGd(MoO4)3:Er3+/Yb3+ Upconversion Phosphor KSrGd(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 : 2025-03-13 DOI: 10.1134/S0020168524701309

N. M. Kozhevnikova

引用次数: 0

Ion Beam and Plasma Modification of Carbon Nanomaterials for Electrochemical Applications 离子束和等离子体修饰碳纳米材料的电化学应用

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 钙钛矿结构PbIn1/2Ta1/2O3的合成方法

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 锌取代羟基磷灰石的合成、性质及抗菌活性研究

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 磁控溅射法在织物上生长二氧化钛基涂层：织物的光活性特性

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 Ga15Ge10Te75-xIx体系外渗玻璃的热性能

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 组分对（tllins2） 1-x （TlGaSe2）多组分固溶体电性能的影响

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