Enhanced thermopower of YBaCo4O7+δ by Na-for-Ba substitution

3rd International Conference on Energy Materials and Environment Engineering

能源学;生态环境科学

Leng, S.L.^1 ; Wang, X.X.^2 ; Song, H.Z.^2

College of Material and Chemical Engineering, Tongren University, Tongren

554300, China^1

Key Laboratory of Material Physics, Ministry of Education, Physical Engineering College, Zhengzhou University, Zhengzhou

450052, China^2

关键词: Ceramic samples;    Na doping;    Power factors;    Solid state reaction method;    Temperature range;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/61/1/012014/pdf
DOI  :  10.1088/1755-1315/61/1/012014

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The electrical resistivity and Seebeck coefficients of YBa1-xNaxCo4O7+δ(x = 0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6) ceramic samples prepared by the solid-state reaction method were measured in the temperature range 390-973 K. The results show that with the increase of the Na doping amount, both the electrical resistivity and Seebeck coefficients increased, and that the maximum value of the Seebeck coefficient can reach 170 μVK-1. According to the power factors, the samples with Na doping amount x = 0.4 and 0.5 have higher power factors at higher temperature, and the maximum value is 71 μWm-1K-2when x = 0.4 at 973 K, being 11% higher than that of the sample without Na doping.