摘要
采用放电等离子烧结(SPS)技术在800～1000K温度范围内原位反应合成了富Co基Skutterudite化合物：FexCO4-xSb12(x=0～1.0），并对化合物的结构、微观形貌及热电性能进行了研究。结果表明化合物的晶格常数随Fe含量的增加而线性增加，电导率随着Fe置换量的增加而增加，Seebeck系数的峰值随着Fe置换量的增加而向高温方向移动，热导率随Fe置换量的增加而进一步降低。对于富Co基Skutterudite化合物FexCo4-xSb12，x=1．0的Fe1．0CO3.0Sb12化合物具有较高的热电性能指数，在673K取得最大ZY值约0．3。
Co-rich skutterudite compounds of Fe_xCo_(4-x)Sb_(12) (x=0～1.0) were synthesized by spark plasma sintering (SPS) at 800～1000K, and the structure, morphologies and thermoelectric properties of the compounds were studied. The lattice constant increased linearly with increasing Fe content, and electric conductivity increased with increasing substitution of Fe for Co sites, while the highest value of Seebeck coefficient shifted towards high temperature range and thermal conductivity further decreased with increasing Fe content. For Co-rich skutterudite compounds of Fe_xCo_(4-x)Sb_(12), the compound of Fe_(1.0)Co_(3.0)Sb_(12) had a higher thermoelectric property and the maximum value of the dimensionless figure of merit ZT of 0.30 was achieved at 673K.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2005年第3期387-389,393,共4页
Journal of Functional Materials
基金
国家自然科学基金资助项目(50271001)
北京市教委科技发展重点资助项目(KZ200310005001)
关键词
方钴矿化合物
放电等离子烧结
电导率
SEEBECK系数
热导率
Skutterudite compounds
spark plasma sintering
electrical resistivity
Seebeck coefficient
thermal conductivity
