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Synthesis of aluminum oxide and oxyhydroxide nanoparticles with tailored properties for advanced ceramic applicationsстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Kozerozhets I.V., Maksimov S.V., Ioni Yu V., Avdeeva V.V., Ivakin Yu D., Kozlova L.O., Kholodkova A.A., Arbanas L.A., Popova A.S., Vasil'ev M.G.
- Журнал: Ceramics International
- Том: 52
- Номер: 5
- Год издания: 2026
- Издательство: Pergamon Press Ltd.
- Местоположение издательства: United Kingdom
- Первая страница: 5735
- Последняя страница: 5744
- DOI: 10.1016/j.ceramint.2025.12.332
- Аннотация: Based on the previously developed fundamental and applied aspects of highly dispersed oxide powder production, the physicochemical principles for synthesizing dispersed oxides and oxyhydroxides with controlled properties have been formulated. The proposed technological scheme of sequential thermal and hydrothermal treatments is demonstrated for the synthesis of nanoscale powders of aluminum oxides (γ-Al2O3, α-Al2O3) and aluminum oxyhydroxide (γ-AlOOH). The synthesized powders of oxygen-containing aluminum compounds possess low bulk density (from 2.045 g/cm3 for γ-Al2O3, from 2.315 g/cm3 for γ-AlOOH, and from 2.924 g/cm3 for α-Al2O3), nanoscale dimensions (average particle size of 22 ± 2 nm for γ-Al2O3, 25 ± 2 nm for γ-AlOOH, and 24 ± 2 nm for α-Al2O3), a disordered defect structure, and high reactivity, manifesting in rapid phase transformations at low temperatures. An improvement in the crystalline structure of the α-Al2O3 nanopowder was observed with an increase in the annealing temperature to 1500 °C, resulting in an increase in the coherent scattering region (CSR) from 583 Å to 715 Å and more precise unit cell parameters (a = 4.740 ± 0.027 Å, b = 4.740 ± 0.027 Å, c = 12.92 ± 0.13 Å vs. a = 4.748 ± 0.045 Å, b = 4.748 ± 0.045 Å, c = 12.91 ± 0.27 Å at lower temperature).
- Добавил в систему: Ивакин Юрий Дмитриевич
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