Multicomponent oxides often have exceptional thermal stability and interesting electronic properties. The present work presents the thermoelectric and electrical properties of the Ba(Zr_0.2Hf_0.2Sn_0.2Ti_0.2Fe_0.2)O_3−δ and Ba(Zr_0.1Hf_0.1Sn_0.1Ti_0.1Co_0.1Ce_0.1Bi_0.1Fe_0.1Y_0.1Zn_0.1)O_3−δ multicomponent perovskites. Single-phase cubic perovskites were synthesized using the solid-state reaction method. They were characterized using X-ray diffraction, drop-solution calorimetry, and thermogravimetry methods. The total electrical conductivity and Seebeck coefficient measurements were performed in dry and wet air at temperatures between 600 and 1050 K. It was found that Ba(Zr_0.1Hf_0.1Sn_0.1Ti_0.1Co_0.1Ce_0.1Bi_0.1Fe_0.1Y_0.1Zn_0.1)O_3−δ is thermodynamically less stable than Ba(Zr_0.2Hf_0.2Sn_0.2Ti_0.2Fe_0.2)O_3−δ. Moreover, this oxide incorporates a higher amount of water and exhibits higher conductivity and lower Seebeck coefficient. Charge transport in both perovskites can be assigned to the small-polaron hopping process via electron holes. An interesting temperature dependence of the Seebeck coefficient was found and, at temperatures above 750 K, related to hopping between energetically inequivalent states.

中文翻译：

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基于取代的锆酸钡三元组分氧化物的热电和电学性能


多组分氧化物通常具有优异的热稳定性和有趣的电子特性。本工作介绍了 Ba（Zr_0.2Hf_0.2Sn_0.2Ti_0.2Fe_0.2）O_3−δ 和 Ba（Zr_0.1Hf_0.1Sn_0.1Ti_0.1Co_0.1Ce_{0.1 的热电和电学性质}Bi_0.1Fe_0.1Y_0.1Zn_0.1）O_3−δ 多组分钙钛矿。采用固相反应法合成了单相立方钙钛矿。使用 X 射线衍射法、滴溶量热法和热重分析方法对它们进行表征。总电导率和塞贝克系数测量是在 600 至 1050 K 之间的干燥和潮湿空气中进行的。研究发现，Ba（Zr_0.1Hf_0.1Sn_0.1Ti_0.1Co_0.1Ce，_0.1Bi_0.1Fe_0.1Y_0.1Zn_0.1）O_3−δ 在热力学上稳定性低于 Ba（Zr_0.2Hf_0,2%锡_0.2Ti_0.2Fe_0.2）O_3−δ。 此外，这种氧化物掺入了更多的水，并表现出更高的电导率和更低的塞贝克系数。两种钙钛矿中的电荷传输都可以通过电子空穴分配给小极化子跳跃过程。发现了塞贝克系数的一个有趣的温度依赖性，并且在 750 K 以上的温度下，它与能量不等效状态之间的跳跃有关。