摘要
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。
Filled skutterudite EuyCo4Sb12 compounds were synthesized by the melting and spark plasma sintering.The effects of an-nealing time on the filling fraction of Eu and thermoelectric properties of EuyCo4Sb12 were investigated.The constituent phases and chemical composition of samples were determined by X-ray diffraction and electron probe microanalysis.In the temperature range of 300-850 K,the electrical conductivity,Seebeck coefficient and thermal conductivity were measured.The results show that with the prol...
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2009年第3期363-366,共4页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金(50702070)
国家“973”计划(2007CB607502)
国家“863”计划(2007AA03Z233)资助项目
关键词
铕
方钴矿
热电性能
退火时间
europium
skutterudite
thermoelectric properties
annealing time