Sm^(3+)掺杂CaMnO_3的制备与热电性能  

Preparation and thermoelectric properties of CaMnO_3 with Sm^(3+) ion doped

作　　者：贾坤[1] 魏长平[1] 许洁[1] 吕志军[1] 

机构地区：[1]长春理工大学化学与环境工程学院,吉林长春130022

出　　处：《功能材料》2010年第10期1738-1740,1743,共4页Journal of Functional Materials

基　　金：中国科协"海外智力为国服务行动计划"资助项目(07064)

摘　　要：以硝酸盐为原料,采用溶胶-凝胶法结合常压烧结在1000℃制备出CaMnO3和掺杂Sm3+的(Ca1-xSmxMnO3)热电材料。利用TG-DTA、XRD、SEM研究了材料的物相和微观形貌,重点考察了Sm3+掺杂对CaMnO3的高温热电性能参数Seebeck系数、电阻率和功率因子的影响。结果表明,制备出的Sm3+掺杂的热电材料为单一的物相,具有致密的内部结构,Sm3+掺杂可以有效地改变其热电性能,当Sm3+的掺杂量为0.05时可获得最佳的热电性能,600℃它的功率因子为2.3×10-4W/(m·K2)。Thermoelectric materials of CaMnO3 doped with Sm3＋ion were synthesized by the sol-gel method and by sintering at 1000℃in air with nitrales as starting materials.The phase composition and microstructure were carefully studied by TG-DTA,XRD,SEM.Thermoelectric properties such as the Seebeck coefficient,electrical resistivity and power factor of Ca1-xSmxMnO3 were carefully studied.The results showed that the samples of CaMnO3doped with Sm3＋ion is single phase and have condensed microstructure.Sm3＋ion doped can improve the thermoelectric properties of CaMnO3,the highest power factor is 2.3×10-4 W/（m·K2）at 600℃for the sample of Sm0.05Ca0.95MnO3.

关 键 词：溶胶-凝胶法 掺杂 锰酸钙 热电性能 

分 类 号：TN3[电子电信—物理电子学]