Paper Title:
Preparation and Thermoelectric Properties of (Ca1-x-yKxBiy)3Co4O9 Ceramic
  Abstract

The precursor of (Ca1-x-yKxBiy)3Co4O9 was synthesized by sol-gel method using nitrate salts as raw materials and citrate acid as agent. The final product was obtained after the precursor was calcined at 800°C for 4 h. The polycrystalline bulk samples were fabricated by a conventional sintering process at 900°C for 12 h. XRD and SEM were used to characterize the microstructures and the composition of the samples. The transport properties of the samples at room temperature were determined by measuring electrical conductivity and Seebeck coefficient. The Bi and K-doped samples show an excellent transport properties even at room temperature. The value of power factor of (Ca0.90K0.075Bi0.025)3Co4O9 reaches 1.42×10-4Wm-1K-2 at 293K, close to the performance of pure Ca3Co4O9 at 1000K.

  Info
Periodical
Key Engineering Materials (Volumes 368-372)
Edited by
Wei Pan and Jianghong Gong
Pages
559-561
DOI
10.4028/www.scientific.net/KEM.368-372.559
Citation
H. M. Hu, Y. Deng, J. Li, G. S. Wang, "Preparation and Thermoelectric Properties of (Ca1-x-yKxBiy)3Co4O9 Ceramic", Key Engineering Materials, Vols. 368-372, pp. 559-561, 2008
Online since
February 2008
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Price
$32.00
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