Ce掺杂Ca_3Co_4O_9的高温热电性能  

High temperature thermoelectric performance of Ce doped Ca_3Co_4O_9

作　　者：朱红玉[1] 李洪涛[2] 贺春元[1] 胡强[3] 宿太超[3] 李尚升[3] 李小雷[3] 马红安[4] 贾晓鹏[3,4] 

机构地区：[1]河南理工大学物理化学学院,河南焦作454003 [2]上海出入境检验检疫局,上海200135 [3]河南理工大学材料科学与工程学院,河南焦作454003 [4]吉林大学超硬材料国家重点实验室,吉林长春130012

出　　处：《功能材料》2012年第8期1061-1063,共3页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51001042);吉林大学超硬材料国家重点实验室开放基金资助项目(20111)

摘　　要：利用二次固相反应方法制备了Ce掺杂的Ca3Co4O9热电材料(CexCa3-xCo4O9,x=0、0.1、0.3),并测试了样品的微观结构和高温热电性能。测试结果表明,Ce替代Ca可有效调制Ca3Co4O9的热电参数;随着温度的升高,样品的电阻率和热导率降低,See-beck系数增大。在973K的温度下,Ce0.1Ca2.9Co4O9具有最高的热电性能(ZT=0.23)。Thermoelectric materials Ca3Co4O9 doped with Ce in the composition of Ca3Co4O9 （x = 0,0.1,0.3） were prepared by solid state reaction. The phase structures and microstructures of the oxides were investigated and the Seebeck coefficient,electrical conductivity and thermal conductivity were measured from room tempera- ture to 973 K. It was found that the electrical resistivity and thermal conductivity decrease with an increase of temperature. While the Seebeck coefficient increases with an increase of temperature. The maximum figure of merit 0.23 is obtained for the Ce0.1Ca2. 9Co4O9 at 973K.

关 键 词：热电材料 CA3CO4O9 固相反应 

分 类 号：TN3[电子电信—物理电子学]