Ag复合(Ca_(0.9)Yb_(0.1))_3Co_4O_9陶瓷的制备及其热电性能  

Preparation and Thermoelectic Properties of(Ca_(0.9)Yb_(0.1))_3Co_4O_9/Ag Ceramic Composites

作　　者：卢艳[1] 宋英[1] 孙秋[1] 王福平[1] 

机构地区：[1]哈尔滨工业大学化工学院,哈尔滨150001

出　　处：《无机化学学报》2009年第9期1682-1685,共4页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金项目(No.50772026);黑龙江省自然科学基金重点项目(No.ZJG0605-01)资助

摘　　要：热电材料是利用固体内部载流子输运实现热能和电能直接相互转换的功能材料。目前，Ca3Co4O9基氧化物是最有希望得到工业应用的热电材料之一．其热稳定性好．在氧化气氛下可以长期工作．无毒性、无污染、使用寿命长。因此，在工业废热发电领域有很大的应用潜力。（Ca0.9Yb0.1）3Co4O9/Ag polycrystalline samples were prepared by a polyacrylamide gel method followed by a Spark Plasma Sintering（SPS） technique. Thermoeleetic properties of （Ca0.9Yb0.1）3Co4O9/Ag ceramics were studied at room temperature. The results indicate that Ag particles are dispersed in the Ca3Co4O9 matrix as the second phase. The Ag particles with around 0.1 μm are dispersed homogeneously in the Ca3Co4O9 matrix. The relative densities of the SPS samples are all above 99%, and the electrical conductivity increases with the increase of Ag. Though the addition of Ag decreases the Seebeck coefficient, the power factor of Ag composites is improved due to the obvious increase of electrical conductivity.

关 键 词：CA3CO4O9 Yb掺杂 Ag复合 热电性能 

分 类 号：O614.122[理学—无机化学] O614.231[理学—化学]