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退火时间对铕填充式方钴矿化合物热电性能的影响

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Abstract:

采用熔融法结合放电等离子烧结技术制备了Eu填充式方钴矿化合物EuyCo4Sb12,研究了退火时间对Eu填充量及化合物热电性能的影响。采用X射线衍射和电子探针表征了化合物的相组成及成分。在300~850K,测试了化合物的电导率、热导率和Seebeck系数,结果表明随着退火时间的延长,Eu在Co4Sb12中的填充量增加,电导率增加,晶格热导率降低,Seebeck系数降低;当退火时间为96h时,Eu填充量达到0.43,与名义组分相同经168h退火所得化合物的Eu填充量相近。

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