摘要
以Co、Sb、Fe及Ce为起始原料,采用放电等离子烧结(SPS)技术原位反应合成了填充式Skutterudite化合物Cey Fe1.0 Co3.0 Sb12,并研究了该化合物的合成条件及热电性能.实验结果表明:当y为0～0.30时,用放电等离子烧结法在573 K开始生成Cey Fe1.0 Co3.0 Sb12且在673～873 K时,Cey Fe1.0 Co3.0 Sb12化合物为主晶相,并伴有极少量的FeSb2和Sb相.晶格常数和Seebeck系数随Ce填充分数的增加而呈线性增加,电导率和热导率随Ce填充分数的增加而降低.Cey Fe1.0 Co3.0 Sb12化合物表现为P型传导,Cey Fe1.0 Co3.0 Sb12化合物中Ce的填充分数y为0.30时,Ce0.30 Fe1.0 Co3.0 Sb12化合物具有较高的热电性能,其中在773 K时具有最大的热电优值(ZT值)0.45.
The filled skutterudite Ce_yFe_(1.0)Co_(3.0)Sb_(12) was prepared by in-situ spark plasma sintering(SPS) technology using Co, Sb, Fe and Ce powder as materials, and the synthesis condition and thermoelectric properties were studied. The results show that the skutterudite phase appears at 573K and becomes main phase with a small amounts of other phases such as FeSb_2 and Sb, when temperature range is 673873K and 0<y≤0.30. All the Ce-filling compounds of Ce_yFe_(1.0)Co_(3.0)Sb_(12) is P-type conduction, the lattice constant and Seebeck coefficient increase with the Ce-filling increasing, while the electrical conductivity and thermal conductivity decrease. The (Ce_(0.30)Fe_(1.0)-)(Co_(3.0)Sb_(12)) compound has higher thermoelectric property when y is 0.30, the maximum value of the dimensionless figure of merit(ZT) is 0.45 at 773K.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2005年第2期277-281,共5页
The Chinese Journal of Nonferrous Metals
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
放电等离子烧结
电导率
热导率
SEEBECK系数
skutterudite
spark plasma sintering
electrical conductivity
thermal conductivity
seebeck coefficient
