Crystal structure and thermoelectric properties of mechanically activated LaCoO3 : научное издание

Dudnikov Vyacheslav A.; Orlov Yuri S.; Solovyov Leonid A.; Vereshchagin Sergey N.; Ustyuzhanin Yuri N.; Zharkov Sergey M.; Zeer Galina M.; Borus Andrey A.; Bondarev Vitaly S.; Ovchinnikov Sergey G.

Дополнительные ссылки: eLibrary

База данных: Каталог библиотеки СФУ

Библиографическое описание: Crystal structure and thermoelectric properties of mechanically activated LaCoO3 : научное издание / Vyacheslav A. Dudnikov [et al.]. - Текст : непосредственный // Journal of the Taiwan Institute of Chemical Engineers. - 2024. - Т. 162, № . - P. 105560. - This study was supported by the Russian Science Foundation , project no. 24-22-00091. The electron microscopy studies were carried out in the Siberian Federal University Joint Scientific Center. - ISSN 1876-1070. - ISSN 1876-1089, DOI 10.1016/j.jtice.2024.105560.

Аннотация: Background: Crystal structure of rare-earth LaCoO3 cobalt oxide subjected to high energy mechanical activation has been studied. In the temperature range of 300–800 K, the electrical conductivity and Seebeck coefficient were measured. Thermal conductivity was measured at 300–480 K. Methods: Comparative analysis of thermoelectric properties of the samples prepared by standard solid-state reaction and using high-energy mechanical activation was carried out. Findings: It was found that the experimental X-ray diffraction patterns are best described within the model that allows the coexistence of two domains in samples with the same crystal symmetry, but different lattice a and c parameters. The percentage ratio of these domains in the samples depends significantly on the size of the initial particles in the solid-state synthesis reaction and the annealing temperature. Mechanical activation and increase of synthesis temperature result in change of Seebeck coefficient sign and significant decrease of electrical resistivity. The Seebeck coefficient of non-activated samples takes positive values over the entire temperature range and decreases monotonically with increasing temperature, in contrast to mechanically activated samples exhibiting ambipolar behavior.

Год издания: 2024

Авторы: Dudnikov Vyacheslav A. , Orlov Yuri S. , Solovyov Leonid A. , Vereshchagin Sergey N. , Ustyuzhanin Yuri N. , Zharkov Sergey M. , Zeer Galina M. , Borus Andrey A. , Bondarev Vitaly S. , Ovchinnikov Sergey G.

Источник: Journal of the Taiwan Institute of Chemical Engineers

Выпуск: Т. 162

Номера страниц: 105560

Держатель оригинала документа: Institute of Chemistry and Chemical Technology, Federal Research Center KSC SB RAS, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Siberian Federal University

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