Thermoelectric properties of calcium silicides

被引：0
|
作者：
Imamura, Yasushi [1 ]
Muta, Hiroaki [1 ]
Kurosaki, Ken [1 ]
Yamanaka, Shinsuke [1 ]
机构：
[1] Osaka Univ, Grad Sch Engn, Div Sustainable Energy & Environm Engn, 2-1 Yamadaoka, Suita, Osaka 5650871, Japan
来源：
ICT'06: XXV INTERNATIONAL CONFERENCE ON THERMOELECTRICS, PROCEEDINGS | 2006年
关键词：
D O I：
暂无
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
We investigated the thermoelectric properties of CaSi, Ca5Si3 and Ca2Si. Polycrystalline CaSi and Ca5Si3 were prepared by spark plasma sintering (SPS) technique. Polycrystalline Ca2Si was prepared by an interdiffusion process. The electrical resistivity, Seebeck coefficient, and thermal conductivity for CaSi and Ca5Si3 were measured from room temperature to approximately 1000 K. Then, the figure of merit was evaluated by using these values. The temperature dependence of the electrical properties for CaSi and Ca5Si3 showed metallic behavior in all temperature range. CaSi showed n-type conduction and Ca5Si3 showed p-type conduction. The evaluated maximum dimensionless figure of merit for CaSi and Ca5Si3 are 5.1 X 10(-3) at 950 K and 0.11 at 950 K, respectively.
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页码：535 / +
页数：2
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