Effect of crystal size distribution on thermoelectric performance for Lanthanum-doped strontium titanate bulk material

Boyu Zhang; Jun Wang; Xinba Yaer; Zhenzhen Huo; Yin Wu; Yan Li; Lei Miao; Chengyan Liu; Tao Zou; Wen Ma

doi:10.1142/S1793604715500708

Effect of crystal size distribution on thermoelectric performance for Lanthanum-doped strontium titanate bulk material

Boyu Zhang, Jun Wang, Xinba Yaer, Zhenzhen Huo, Yin Wu, Yan Li, Lei Miao, Chengyan Liu, Tao Zou, Wen Ma

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

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.

Original language	English
Article number	1550070
Journal	Functional Materials Letters
Volume	8
Issue number	6
DOIs	https://doi.org/10.1142/S1793604715500708
Publication status	Published - 2015 Dec 1
Externally published	Yes

Keywords

crystal size
hydrothermal synthesis
molten salt synthesis
Strontium titanate
thermoelectric material

ASJC Scopus subject areas

Materials Science(all)

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10.1142/S1793604715500708

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Effect of crystal size distribution on thermoelectric performance for Lanthanum-doped strontium titanate bulk material. / Zhang, Boyu; Wang, Jun; Yaer, Xinba; Huo, Zhenzhen; Wu, Yin; Li, Yan; Miao, Lei; Liu, Chengyan; Zou, Tao; Ma, Wen.

In: Functional Materials Letters, Vol. 8, No. 6, 1550070, 01.12.2015.

Research output: Contribution to journal › Article › peer-review

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abstract = "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.",

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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

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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.

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