溶胶-燃烧法制备Ce_(0.8)Gd_(0.2)O_(1.9)及其性能  

Preparation and Characterization of Ce_(0.8)Gd_(0.2)O_(1.9) by sol-combustion method

作　　者：程继海[1] 鲍巍涛[1] 朱德春[1] 王华林[2] 

机构地区：[1]合肥学院化学与材料工程系,合肥230022 [2]合肥工业大学化工学院,合肥230009

出　　处：《功能材料与器件学报》2009年第4期350-354,共5页Journal of Functional Materials and Devices

基　　金：合肥学院科研发展基金项目(No.08KY014ZR);合肥学院引进人才基金启动项目(No.RC018)

摘　　要：采用溶胶-燃烧法合成了Gd掺杂CeO2的Ce0.8Gd0.2O1.9(GDC)电解质粉末。研究了热处理温度对其相组成、颗粒大小、晶胞参数的影响。并对GDC烧结体的性能进行了研究。结果表明,溶胶-燃烧法可以成功制备出具有良好的烧结性的GDC电解质粉末,1500℃下得到的GDC烧结体的相对密度可以达到95%。电性能测试表明烧结体在中温范围内具有较高的氧离子电导率。Nanosized particles of Ce0.8Gd0.2O1.9（ GDC ） electrolyte materials for low - temperature solid oxide fuel cells were prepared by a so called sol -combustion technique using citric acid as the chelating agent. The effects of different sintering temperature were investigated on the evolution of crystalline phase, particle size, and lattice parameters of the resulted GDC. Ultra - fine GDC powders of around 30nm in diameter were successfully prepared by the sol - combustion technique. The powders showed a high sintering activity, and GDC ceramic could reach 95% of the theoretical at a sintering temperature of 1500℃. Electrochemistry measurements showed that the GDC ceramics had relatively high oxygen ionic conductivity in low- temperature range.

关 键 词：中温固体氧化物燃料电池 掺杂CeO2 溶胶-燃烧法 电导率 

分 类 号：TB34[一般工业技术—材料科学与工程] TB321