TY - JOUR
T1 - Effect of crystal size distribution on thermoelectric performance for Lanthanum-doped strontium titanate bulk material
AU - Zhang, Boyu
AU - Wang, Jun
AU - Yaer, Xinba
AU - Huo, Zhenzhen
AU - Wu, Yin
AU - Li, Yan
AU - Miao, Lei
AU - Liu, Chengyan
AU - Zou, Tao
AU - Ma, Wen
N1 - Funding Information:
This work is partially supported by Science Research Grant for Inner Mongolia Higher Educational Institute to Jun Wang (NJZY12065) and open fund of Key laboratory for Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences (GIEC) (y407k61001).
Publisher Copyright:
© 2015 World Scientific Publishing Company.
PY - 2015/12/1
Y1 - 2015/12/1
N2 - Effect of crystal size distribution on thermoelectric performance of Lanthanum-doped strontium titanate (La-SrTiO3) ceramics are investigated in this study. Thermoelectric performance measurement, coupled with microstructure studies, shows that the electrical conductivity strongly depends on the crystal size, potential barrier on the grain boundary and porosity. Meantime, because the average potential barriers height are increased along with the reduction of crystal size, the Seebeck coefficients are increased by energy filtering effect at the large number of grain boundaries. As a result, by controlling of crystal size distribution, ZT value of La-SrTiO3 is improved.
AB - Effect of crystal size distribution on thermoelectric performance of Lanthanum-doped strontium titanate (La-SrTiO3) ceramics are investigated in this study. Thermoelectric performance measurement, coupled with microstructure studies, shows that the electrical conductivity strongly depends on the crystal size, potential barrier on the grain boundary and porosity. Meantime, because the average potential barriers height are increased along with the reduction of crystal size, the Seebeck coefficients are increased by energy filtering effect at the large number of grain boundaries. As a result, by controlling of crystal size distribution, ZT value of La-SrTiO3 is improved.
KW - Strontium titanate
KW - crystal size
KW - hydrothermal synthesis
KW - molten salt synthesis
KW - thermoelectric material
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U2 - 10.1142/S1793604715500708
DO - 10.1142/S1793604715500708
M3 - Article
AN - SCOPUS:84945948690
VL - 8
JO - Functional Materials Letters
JF - Functional Materials Letters
SN - 1793-6047
IS - 6
M1 - 1550070
ER -