Thermoelectric properties of CaMnO 3 system
作者： R. Funahashi , A. Kosuga , N. Miyasou , E. Takeuchi , S. Urata
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摘要: Ca1-xRExMnO3 (RE: Nd, Tb, Ho, Yb, Lu, x = 0.1 and 0.2) bulks were prepared by a solid state reaction. They show metallic behavior at temperatures higher than about 400 K electrical resistivity rho is lower 12 mOmega cm 1000 in air. Absolute values of Seebeck coefficient S increases with temperature up to 973 for all samples except Ca0.9Yb0.1MnO3 K. For Ca0.9Lu0.1MnO3, value reaches -130 muV/K Both thermoelectric properties are dominated mainly crystallographic structure. Power factor PF (=S2/rho) decreasing cell volume. Thermal conductivity kappa Yb- Lu-substituted as low 1.5 W/m-K2 dimension-less figure merit ZT 0.16 Ca0.8Lu0.2MnO3
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