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Thermal diffusivity and conductivity of ceramics based on the GdFeO3– GdCrO3 systemстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Kenges K.M., Enikeeva M.O., Tomovich M.V., Тugova Е.А.
- Журнал: Ceramics International
- Том: 51
- Номер: 10
- Год издания: 2025
- Издательство: Pergamon Press Ltd.
- Местоположение издательства: United Kingdom
- Первая страница: 13271
- Последняя страница: 13276
- DOI: 10.1016/j.ceramint.2025.01.171
- Аннотация: Gadolinium ferrochromites were successfully synthesized as continuous solid solutions in the GdFeO3 – GdCrO3 system via solid-state reaction. Structural and microstructure analyses revealed the formation of an orthorhombic perovskite-type phase with isometric chain-like grains. SEM data demonstrated a systematic decrease in the average grain size, from ∼9.0 μm to ∼2.0 μm, as the Cr content increased. The thermal properties, including thermal diffusivity and thermal conductivity, were investigated using the laser-flash diffusivity method. Thermal diffusivity was observed to decrease with increasing Cr substitution, consistent with enhanced phonon scattering induced by finer grains and increased porosity. Compositions with x = 0.50 and 0.77, sintered at 1400°C for 24 h, exhibited optimal thermal insulation properties, characterized by porosity levels of 44–48% and thermal conductivities of 0.6-0.7 W/(m*K) at room temperature. These findings demonstrate that the microstructure and thermal properties of GdFe1-xCrxO3 oxides can be tuned through Cr doping, making them promising candidates for thermal insulation applications in high-temperature conditions.
- Добавил в систему: Еникеева Мария Олеговна