Термоэлектрические свойства манганитов Ca 0.5− x  Sr 0.5 Lu  x  MnO 3−δ

Константинова Е. И.; Литвинов В. А.; Рыжков М. А.; Коряков А. Д.; Леонидов И. А.

doi:10.31857/S0002337X23120059

Термоэлектрические свойства манганитов Ca_0.5−xSr_0.5Lu_xMnO_3−δ

Autores: Константинова Е.¹, Литвинов В.¹, Рыжков М.¹^,2, Коряков А.¹, Леонидов И.¹
Afiliações:
1. Институт химии твердого тела УрО Российской академии наук
2. Уральский федеральный университет им. первого Президента России Б.Н. Ельцина
Edição: Volume 59, Nº 12 (2023)
Páginas: 1365-1371
Seção: Articles
URL: https://journals.rcsi.science/0002-337X/article/view/252417
DOI: https://doi.org/10.31857/S0002337X23120059
EDN: https://elibrary.ru/VCIYSS
ID: 252417

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Resumo

На основе результатов измерений удельной электропроводности (σ), коэффициента Зеебека (S), термического расширения, теплоемкости и температуропроводности на воздухе в температурном диапазоне 300–1200 K определены теплопроводность (κ), фактор мощности (S²σ) и термоэлектрическая добротность (ZT = S²σT/κ) манганитов Ca_0.5−xSr_0.5Lu_xMnO_3−δ, где x = 0.05, 0.10, 0.15 и 0.20. Установлено, что наибольшие S²σ и ZT имеет состав Ca_0.45Sr_0.5Lu_0.05MnO_3−δ, благодаря высоким значениям S и низкой κ.

Palavras-chave

: перовскитоподобные манганиты, электропроводность, коэффициент Зеебека, теплоемкость, термическое расширение

Bibliografia

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