Preparation and Thermoelectric Properties of (Ca1-x-yKxBiy)3Co4O9 Ceramic

摘要：

　　The precursor of (Ca1-x-yKxBiy)3Co4O9 was synthesized by sol-gel method using nitrate salts as raw materials and citrate acid as agent.The final product was obtained after the precursor was calcined at 800℃ for 4 h.The polycrystalline bulk samples were fabricated by a conventional sintering process at 900℃ for 12 h.XRD and SEM were used to characterize the microstructures and the composition of the samples.The transport properties of the samples at room temperature were determined by measuring electrical conductivity and Seebeck coefficient.The Bi and K-doped samples show an excellent transport properties even at room temperature,The value of power factor of (Ca0.90K0.075Bi0.025)3Co4O9 reaches 1.42× 10-4Wm-1K-2 at 293K,close to the performance of pure Ca3Co4O9 at 1000K.

关键词： (Ca1-x-yKxBiy)3Co4O9 Sol-gel Thermoelectric properties

作者: Haoming Hua Yuan Dengb Jian Li Guangsheng Wang

作者单位: School of Materials Science and Engineering,BeiHang University,Beijing 100083,China

会议类型: 国际会议

会议名称: The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))

会议地点: 长沙

会议语种:英文

页码: 559-561

在线出版日期: 2007-05-10（万方平台首次上网日期，不代表论文的发表时间）