Preparation and Thermoelectric Properties of Ca3Co4O9 Ceramics with Parallel Sheet Shaped Pores
Ca3Co4O9 powders were synthesized by a solid-state reaction method.Porous Ca3Co4O9 ceramics with parallel sheet shaped pores were prepared by a template sacrifice method using epispastic polystyrend (EPS) hollow spheres as the templates.During compaction of the green body,the EPS hollow spheres change into EPS discs due to the pressing force.After sintering,the pores in the Ca3Co4O9 ceramics are sheet shaped,well distributed and parallel to the pressing surface of compaction.The value of ZT merit of the porous Ca3Co4O9 sample obtained with 10 wt% EPS spheres is 0.0489.It was found that the ZT merit value can be improved by changing the density of sample to achieve a high ratio of electrical conductivity to thermal conductivity.
Ca3Co4O9 porous sheet shaped pores thermoelectric property
Huadong Wang Xudong Sun Xueyong Ding Mu Zhang Xiaodong Li Ji-Guang Li Di Huo Shaohong Liu
Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education)adn School of Materials Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education)adn School of Materials
国际会议
景德镇
英文
355-359
2012-10-15（万方平台首次上网日期，不代表论文的发表时间）