Enhancement of Thermoelectric Performance of Sr0.9 Ba0.1 Ti0.8 Nb0.2 O3 Ceramics by A-Site Cation Nonstoichiometry
ZHANG Xin1,2 , LIU Jian1** , LI Yi1 , SU Wen-Bin1 , LI Ji-Chao1 , ZHU Yuan-Hu1 , LI Mao-Kui1 , WANG Chun-Ming1 , WANG Chun-Lei1
1 School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 2501002 Taishan College, Shandong University, Jinan 250100
Abstract ：Sr0.9 Ba0.1?x Ti0.8 Nb0.2 O3 ceramics (x =0, 0.01, 0.02 and 0.05) are prepared by solid state reaction, whose thermoelectric properties are investigated from 323 K to 1073 K. By introducing A-site nonstoichiometry, the absolute Seebeck coefficient is enhanced, while the electrical resistivity is surprisingly reduced due to the significantly enhanced carrier mobility. These results are dramatic in thermoelectric materials, effectively enhancing the power factor. Moreover, the thermal conductivity is reduced, thus the thermoelectric performance of Sr0.9 Ba0.1 Ti0.8 Nb0.2 O3 ceramic is significantly enhanced by A-site nonstoichiometry.
出版日期: 2015-02-26
:
72.20.Pa
(Thermoelectric and thermomagnetic effects)
72.10.Fk
(Scattering by point defects, dislocations, surfaces, and other imperfections (including Kondo effect))
74.62.Dh
(Effects of crystal defects, doping and substitution)
引用本文:
. [J]. 中国物理快报, 2015, 32(03): 37201-037201.
0.9 Ba0.1 Ti0.8 Nb0.2 O3 Ceramics by A-Site Cation Nonstoichiometry. Chin. Phys. Lett., 2015, 32(03): 37201-037201.
链接本文:
https://cpl.iphy.ac.cn/CN/10.1088/0256-307X/32/3/037201
或
https://cpl.iphy.ac.cn/CN/Y2015/V32/I03/37201
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