CAO Hengqi, XIAO Hanning, KANG  Ling, WANG Mingming

(1. School of Physics and Electronic Science, Changsha University of Science & Technology, Changsha, Hunan 410076;

2. School of Materials Science and Engineering, Hunan University, Changsha, Hunan 410082)

Abstract: Ba_1-xY_xSnO₃ (0≤x≤0.01) powders were synthesized by the substitution of yttrium for barium in BaSnO₃ via a solid state reaction route. The phase compositions of the synthesized samples were analyzed. The electric conductivity at room temperature and the relationship between the Seebeck coefficient and the amount of yttrium doping (x) for Ba_1-xY_xSnO₃ were investigated. Results show: with the increase of x, the absolute value of the Seebeck coefficient increases and the electric conductivity decreases; when x=0.006, the power factor P of Ba_1-xY_xSnO₃ ceramics is high.

Keywords: thermoelectric materials, BaSnO₃, yttria-doping