Thermoelectric properties of Ca3-xYxCo4O9+δ ceramics

H. Q. Liu; Y. Song; S. N. Zhang; X. B. Zhao; F. P. Wang

doi:10.1016/j.jpcs.2009.01.003

Thermoelectric properties of Ca_3-xY_xCo₄O_9+δ ceramics

H. Q. Liu
, Y. Song
, S. N. Zhang
, X. B. Zhao^*
, F. P. Wang

^*Corresponding author for this work

Zhejiang University
School of Chemistry and Chemical Engineering, Harbin Institute of Technology

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

81 Scopus citations

Abstract

The Ca_3-xY_xCo₄O_9+δ (x=0, 0.15, 0.3) ceramics were prepared by combining the polyacrylamide gel method and the spark plasma sinter (SPS) technology in order to improve the thermoelectric properties of Ca₃Co₄O_9+δ ceramics. The Seebeck coefficients and the resistivities of the Y-doped samples were obviously enhanced due to the decrease of carrier concentration, and their thermal conductivities were decreased due to the impurity scattering effect. The thermoelectric properties were improved at high temperature by Y-doping according to the power factor analysis and the thermoelectric figure of merit (ZT) data. The optimized figure of merit ZT=0.22 at 973 K was obtained for Ca_2.7Y_0.3Co₄O_9+δ.

Original language	English
Pages (from-to)	600-603
Number of pages	4
Journal	Journal of Physics and Chemistry of Solids
Volume	70
Issue number	3-4
DOIs	https://doi.org/10.1016/j.jpcs.2009.01.003
State	Published - Mar 2009
Externally published	Yes

Keywords

A. Ceramics
B. Chemical synthesis
D. Electrical properties
D. Thermal conductivity

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10.1016/j.jpcs.2009.01.003

Cite this

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title = "Thermoelectric properties of Ca3-xYxCo4O9+δ ceramics",

abstract = "The Ca3-xYxCo4O9+δ (x=0, 0.15, 0.3) ceramics were prepared by combining the polyacrylamide gel method and the spark plasma sinter (SPS) technology in order to improve the thermoelectric properties of Ca3Co4O9+δ ceramics. The Seebeck coefficients and the resistivities of the Y-doped samples were obviously enhanced due to the decrease of carrier concentration, and their thermal conductivities were decreased due to the impurity scattering effect. The thermoelectric properties were improved at high temperature by Y-doping according to the power factor analysis and the thermoelectric figure of merit (ZT) data. The optimized figure of merit ZT=0.22 at 973 K was obtained for Ca2.7Y0.3Co4O9+δ.",

keywords = "A. Ceramics, B. Chemical synthesis, D. Electrical properties, D. Thermal conductivity",

author = "Liu, \{H. Q.\} and Y. Song and Zhang, \{S. N.\} and Zhao, \{X. B.\} and Wang, \{F. P.\}",

year = "2009",

month = mar,

doi = "10.1016/j.jpcs.2009.01.003",

language = "英语",

volume = "70",

pages = "600--603",

journal = "Journal of Physics and Chemistry of Solids",

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number = "3-4",

}

TY - JOUR

T1 - Thermoelectric properties of Ca3-xYxCo4O9+δ ceramics

AU - Liu, H. Q.

AU - Song, Y.

AU - Zhang, S. N.

AU - Zhao, X. B.

AU - Wang, F. P.

PY - 2009/3

Y1 - 2009/3

N2 - The Ca3-xYxCo4O9+δ (x=0, 0.15, 0.3) ceramics were prepared by combining the polyacrylamide gel method and the spark plasma sinter (SPS) technology in order to improve the thermoelectric properties of Ca3Co4O9+δ ceramics. The Seebeck coefficients and the resistivities of the Y-doped samples were obviously enhanced due to the decrease of carrier concentration, and their thermal conductivities were decreased due to the impurity scattering effect. The thermoelectric properties were improved at high temperature by Y-doping according to the power factor analysis and the thermoelectric figure of merit (ZT) data. The optimized figure of merit ZT=0.22 at 973 K was obtained for Ca2.7Y0.3Co4O9+δ.

AB - The Ca3-xYxCo4O9+δ (x=0, 0.15, 0.3) ceramics were prepared by combining the polyacrylamide gel method and the spark plasma sinter (SPS) technology in order to improve the thermoelectric properties of Ca3Co4O9+δ ceramics. The Seebeck coefficients and the resistivities of the Y-doped samples were obviously enhanced due to the decrease of carrier concentration, and their thermal conductivities were decreased due to the impurity scattering effect. The thermoelectric properties were improved at high temperature by Y-doping according to the power factor analysis and the thermoelectric figure of merit (ZT) data. The optimized figure of merit ZT=0.22 at 973 K was obtained for Ca2.7Y0.3Co4O9+δ.

KW - A. Ceramics

KW - B. Chemical synthesis

KW - D. Electrical properties

KW - D. Thermal conductivity

UR - https://www.scopus.com/pages/publications/67349104657

U2 - 10.1016/j.jpcs.2009.01.003

DO - 10.1016/j.jpcs.2009.01.003

M3 - 文章

AN - SCOPUS:67349104657

SN - 0022-3697

VL - 70

SP - 600

EP - 603

JO - Journal of Physics and Chemistry of Solids

JF - Journal of Physics and Chemistry of Solids

IS - 3-4

ER -

Thermoelectric properties of Ca_3-xY_xCo₄O_9+δ ceramics

Abstract

Keywords

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