Paper Title:
Thermal Transport Properties of Ca3Co4O9 with Mg Substitution
  Abstract

Polycrystalline Ca3-xMgxCo4O9(x=0-0.3)ceramics were prepared by the sol–gel method combined with the ordinary pressing sintering and the thermal conductivities were measured from room temperature to 673 K. The influence of Mg2+ substitution for Ca2+ on the thermal conductivities of Ca3Co4O9 ceramics was investigated systematically. The influence of Mg doping on the thermal conductivities is mainly embodied in the lattice thermal conductivities, which shows a significant decrease with the increase of the dopant content for the samples with x ≤ 0.2, while the carrier thermal conductivity had no obvious change with Mg doping increasing. These results indicated that the thermal conductivities of the material could be reduced remarkably with the substitution of Mg from 1.427 W/m·K to 0.731 W/m·K at 573 K with x = 0.2.

  Info
Periodical
Chapter
Chapter 2: Frontiers of Building Materials
Edited by
Dongye Sun, Wen-Pei Sung and Ran Chen
Pages
959-962
DOI
10.4028/www.scientific.net/AMM.71-78.959
Citation
X. L. Qi, L. K. Zeng, Y. Y. Fan, "Thermal Transport Properties of Ca3Co4O9 with Mg Substitution", Applied Mechanics and Materials, Vols. 71-78, pp. 959-962, 2011
Online since
July 2011
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Price
$32.00
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