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Title: Improvement of the Thermoelectric Characteristics of Fe-doped Misfit-layered Ca3Co4−xFexO9+δ (x=0, 0.05, 0.1, and 0.2)
Authors: Liu, Chia-Jyi;Huang, Li-Chen;Wang, Jung-Sheng
Contributors: 物理學系
Date: 2006
Issue Date: 2012-09-10T06:14:44Z
Publisher: American Institute of Physics
Abstract: The authors report measurements of the electrical resistivity, Seebeck coefficient, and thermal conductivity for a series of misfit-layered oxides Ca3Co4−xFexO9+δ (x = 0, 0.05, 0.1, 0.15, 0.2) prepared by solid state reaction. Structural parameters are refined with superspace group of X2/m(0b0)s0 using powder x-ray diffraction data. With partial substitution of Fe+2 for Co+3, the resistivity decreases, while the thermopower increases simultaneously. The x = 0.05 sample exhibits a higher figure of merit (Z = 3.01×10−4 K−1) than that of Ca3Co4O9+δ (0.33×10−4 K−1) at 300 K, indicating much improvement of thermoelectric characteristics via partial substitution of Fe for Co.
Relation: Appl. Phys. Lett., 89(20): 204102
Appears in Collections:[物理學系] 期刊論文

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