Citation: WANG Ting-Ting, SUN Qiu, SONG Ying. Effects of Bi Doping on Thermoelectric Properties of La_0.1Sr_0.9TiO₃ Ceramics[J]. Chinese Journal of Inorganic Chemistry, ;2017, 33(4): 659-663. doi: 10.11862/CJIC.2017.083 shu

Effects of Bi Doping on Thermoelectric Properties of La_0.1Sr_0.9TiO₃ Ceramics

School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China

Corresponding author: SONG Ying, songy@hit.edu.cn
Received Date: 5 January 2017
Revised Date: 9 March 2017

Figures(5)

La_0.1Bi_xSr_0.9-xTiO₃(x=0, 0.05, 0.075, 0.1) ceramics were fabricated at 1 500℃ for 4 h in 5%H₂+95%N₂(V/V) reduction atmosphere. The phase composition, microstructure and thermoelectric properties were investigated. The results indicated that the main phase of the samples doped with Bi was SrTiO₃, and trace Bi₂O₃ was observed when the Bi doping content is more than 0.075. The grain of the samples doped with Bi was fully developed, regularly shaped and combined closely, suggesting the good sintering effect of Bi₂O₃. Moreover, the electric conductivity and the absolute Seebeck coefficient of La_0.1Sr_0.9TiO₃ ceramics increased obviously with the doping of Bi, indicating that the carrier concentration and carrier mobility were greatly improved by the Bi doping. The power factor of the sample with x=0.075 was maximum, which attained 692 μW·m^-1·K^-2 at 400℃. Though the thermal conductivity of the samples doped with Bi was higher than that of the sample without Bi, the ZT value of the sample with x=0.075 could still reach 0.172 at 500℃, which was increased by 130% compared with that of the sample without Bi.
- SrTiO₃,
- doping,
- thermoelectric properties,
- microstructure
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沈阳化工大学材料科学与工程学院沈阳 110142

Effects of Bi Doping on Thermoelectric Properties of La0.1Sr0.9TiO3 Ceramics

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通讯作者: 陈斌, bchen63@163.com

Effects of Bi Doping on Thermoelectric Properties of La_0.1Sr_0.9TiO₃ Ceramics