Structure, Ionic Transport Properties and Scaling Behavior of Eu, Pr, and Sm Co-Doped Ceria Oxygen Ion Conductors

被引：7

作者：

Anirban, Sk. ^{[1
]}

Dutta, Abhigyan ^{[2
]}

机构：

[1] Govt Gen Degree Coll, Dept Phys, Salboni 721516, Paschim Medinip, India

[2] Univ Burdwan, Dept Phys, Burdwan 713104, W Bengal, India

来源：

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | 2019年 / 216卷 / 02期

关键词：

co-doped ceria; Cole-Davidson formalism; ionic conductivity; relaxation; scaling; ELECTRICAL-CONDUCTIVITY; HYDROTHERMAL SYNTHESIS; DIELECTRIC-RELAXATION; GRAIN-BOUNDARIES; HIGH-TEMPERATURE; GD; DY; ELECTROLYTES; CHARGE; ND3+;

D O I：

10.1002/pssa.201800352

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this work, structural, electrical, and scaling behavior of Eu, Pr, and Sm co-doped ceria-based ionic conductors are reported. The materials are prepared using citrate-auto ignition method. The average particle size is found to be within 20 nm. The values of lattice parameter are found to depend on the ionic radius of dopants. Sm-Eu co-doped ceria shows the highest conductivity and lowest activation energy for the conduction. Pr-Sm co-doped ceria shows highest and Sm-Eu co-doped ceria shows lowest migration energy. The values of dc conductivity are found to be consistent with the charge carrier concentration. The relaxation phenomenon is investigated using Cole-Davidson formalism. The scaling behavior of complex impedance plots, impedance and modulus spectra confirm the temperature and dopant-independent conduction and relaxation mechanism. The impact of multivalency of Pr on conductivity and relaxation is also discussed.

引用

页数：11

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