固相反应快速制备铜掺杂方钴矿及其热电性质研究  

Study on Solid-state Reaction Synthesis and Thermoelectric Properties of Cu-filled Skutterudite

作　　者：籍永华 秦丙克 黄润[2] 张金柱[2] JI Yonghua;QIN Bingke;HUANG Run;ZHANG Jinzhu(School of Chemistry and Materials Engineering,Liupanshui Normal University,Liupanshui 553004,China;College of Materials and Metallurgy,Guizhou University,Guiyang 550025,China)

机构地区：[1]六盘水师范学院化学与材料工程学院,六盘水553004 [2]贵州大学材料与冶金学院,贵阳550025

出　　处：《硅酸盐通报》2020年第7期2343-2348,共6页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(51764005);六盘水师范学院校级基金项目(LPSSYKYJJ201902);六盘水师范学院科技创新团队(LPSSYKJTD201905);六盘水市科技局基金项目(52020-2019-05-08);六盘水冶金节能环保与循环经济重点实验室(52020-2018-03-04);贵州省六盘水师范学院院士工作站(黔科合平台人才[2019]5604号)。

摘　　要：采用固相反应法在制备温度923 K,保温时间约30 min的条件下,快速合成了铜掺杂方钴矿CuxCo4Sb(12)(x=0、0.1、0.3、0.5、0.7、0.9),对样品进行了物相结构(XRD)、微观结构和不同温度条件下的热电性质测试分析。结果表明,所制备的样品CuxCo4Sb(12)在0≤x≤0.7的范围内均为单相的方钴矿结构,样品含有许多微气孔,晶粒细小,平均直径在微纳米级。当测试温度为696 K时,样品Cu(0.1)Co4Sb(12)获得最低电阻率为48.71μΩ·m。在测试温度为462 K时,样品Cu(0.3)Co4Sb(12)获得最大Seebeck系数为233.14μV/K。样品Cu(0.1)Co4Sb(12)在测试温度为578 K时,获得最大的ZT值为0.24。Cu-filled skutterudite CuxCo4Sb 12(x=0,0.1,0.3,0.5,0.7,0.9)was synthesized by solid-state reaction at 923 K and holding time about 30 min.The phase structure(XRD),microstructure and thermoelectric properties of the samples were characterized.The results show that Cu x Co 4Sb 12 is single-phase skutterudite structure in the range of 0≤x≤0.7,the samples contain many micro-pores,and the average diameter of the fine grains is in the micro-nano scale.When the test temperature is 696 K,the lowest resistivity of Cu 0.1 Co 4Sb 12 is 48.71μΩ·m.The maximum Seebeck coefficient of Cu 0.3 Co 4Sb 12 is 233.14μV/K at 462 K.The figure of merit value(ZT)of Cu 0.1 Co 4Sb 12 reaches 0.24 at 578 K.

关 键 词：热电材料 CoSb3 铜掺杂 固相反应 微观结构 

分 类 号：TN304[电子电信—物理电子学]