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Fe-Co-Si-Cu热电材料的输运特性
引用本文:李伟文,赵新兵,朱铁军,曹高劭.Fe-Co-Si-Cu热电材料的输运特性[J].稀有金属材料与工程,2003,32(8):621-623.
作者姓名:李伟文  赵新兵  朱铁军  曹高劭
作者单位:浙江大学硅材料国家重点实验室,浙江,杭州,310027
基金项目:SupportedbytheNationalNaturalScienceFoundationofChina(NSFC59971044)
摘    要:采用真空悬浮熔炼和真空退火方法制备了Fe1-xCoxSi2-0.1at%Cu热电材料。试样的微观组织中包含大量尺寸在1μm左右的小孔和一些裂纹。输运特性测量结果表明,550K时掺杂载流子的热激发达到饱和,700K以上发生本征激发现象。实验发现Co的最佳掺杂量为lat%左右,名义组成为Fe0.97Co0.03Si2-0.1at%Cu的试样的热电性能最好。

关 键 词:热电材料  输运特性  功率因子  微观组织

Transport Properties of Fe-Co-Si-Cu Thermoelectric Alloys
Li Weiwen,Zhao Xinbing,Zhu Tiejun,Cao Gaoshao.Transport Properties of Fe-Co-Si-Cu Thermoelectric Alloys[J].Rare Metal Materials and Engineering,2003,32(8):621-623.
Authors:Li Weiwen  Zhao Xinbing  Zhu Tiejun  Cao Gaoshao
Abstract:The microstructure and transport properties of the levitation-melting thermoelectric alloys Fe1-xCoxSi2-0. 1at% Cu wereexamined. Their microstructures were found to consist of many grains and crystal boundaries in a β-FeSi2 matrix. The alloyFe0.97Co0.03Si2-0.1at% Cu annealed for 24 h at 1 070K was found to have excellent transport properties. It is suggested thatdoping with 1.0at% (x = 0.03) of cobalt can significantly improve the thermoelectric properties of Fe1-x.xCoxSi2-0. 1at% Cu.
Keywords:thermoelectric materials  transport properties  power factor  microstructure
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