Phases, Electrical Properties, and Stability of High-Entropy Pyrochlores [(La0.25Nd0.25Sm0.25Eu0.25)1-xCax]2Zr2O7-δ Oxides

被引：3
|
作者：
Wei, Huina [1 ]
Chen, Wenzhuo [1 ]
Hou, Keke [1 ]
Duan, Xiaoxu [1 ]
Liu, Laijun [1 ]
Xu, Jungu [1 ]
机构：
[1] Guilin Univ Technol, Guangxi Univ Key Lab Nonferrous Met Oxide Elect Fu, Coll Mat Sci & Engn, MOE Key Lab New Proc Technol Nonferrous Met & Mat, Guilin 541004, Peoples R China
来源：
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | 2024年 / 221卷 / 06期
基金：
中国国家自然科学基金;
关键词：
chemical stability; high entropy; oxide ion conductors; pyrochlores structure; LOW THERMAL-CONDUCTIVITY; RARE-EARTH-ZIRCONATE; ION CONDUCTIVITY; FUEL-CELLS; CERAMICS; LA2ZR2O7; TEMPERATURE; ELECTROLYTE; ND;
D O I：
10.1002/pssa.202300753
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Series of Ca2+ ion-doped high-entropy [(La0.25Nd0.25Sm0.25Eu0.25)(1-x)Ca-x](2)Zr2O7-delta (x = 0.025, 0.05, 0.075, 0.1, and 0.2) materials are prepared through a traditional solid-state reaction method. The solubility of Ca is revealed to be x = 0.075, which is higher than that in the cases with single lanthanide on the A-site of A(2)Zr(2)O(7)-based pyrochlore materials. The study of electrical properties discloses that the conductivities of [(La0.25Nd0.25Sm0.25Eu0.25)(1-x)Ca-x](2)Zr2O7-delta increased with Ca-doping level and dominated by oxide ion conduction, without noticeable proton conduction. Good chemical stability is revealed for these materials under a wet CO2 atmosphere.
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页数：9
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