致密度对填充skutterudite化合物La_(0.75)Fe_3CoSb_(12)热电性能的影响  

Effect of density on the thermoelectric properties of the filled skutterudite compound La_(0.75)Fe_3CoSb_(12)

作　　者：杨磊[1] 张澜庭[1] 吴建生[1] 

机构地区：[1]上海交通大学材料科学与工程学院教育部高温材料及测试开放实验室,上海200030

出　　处：《物理学报》2004年第2期537-542,共6页Acta Physica Sinica

基　　金：国家自然科学基金 (批准号 :5 990 2 0 0 3 )资助的课题~~

摘　　要：研究了致密度对填充skutterudite化合物La0 75Fe3CoSb1 2 热电性能的影响 .La0 75Fe3CoSb1 2 表现为p型传导 ,载流子迁移率随着致密度的增加而升高 .由于样品中空洞的散射作用 ,致使电阻率 ρ随着致密度的降低而升高 ,同时造成热导率κ的下降 ,但塞贝克系数α与致密度关系不大 ,致密度造成电阻率 ρ升高的比率与热导率κ下降的比率相当 ,致密度不同的样品具有相当的ZT值 .致密度对填充式skutterudite化合物La0 75Fe3CoSb1 2The effect of density on the thermoelectric properties of the filled skutterudite compound La 0.75Fe 3CoSb 12 was investigated. The La 0.75Fe 3CoSb 12 showed p-type conduction. The mobility increased with an increase in density. The electrical resistivity increased and the thermal conductivity decreased with decreasing density due to the pores scattering. The Seebeck coefficient is independent of density. The portion of electrical resistivity increase is consistent with that of the thermal conductivity reduction. The value of ZT of the specimen with low density is compared to that of specimen with high density. The value of ZT does not depend on density.

关 键 词：致密度 填充skutterudite化合物 热电性能 载流子迁移率 散射作用 电阻率 塞贝克系数 

分 类 号：O614[理学—无机化学]