溶胶凝胶-自燃烧法制备Ce_(0.8)Y_(0.18)Fe_(0.02)O_(1.9)电解质材料及其性能研究  

Properties of Ce_(0.8)Y_(0.18)Fe_(0.02)O_(1.9)Electrolyte Prepared by Sol-gel Auto-combustion Method

作　　者：田长安[1] 张骏祥[1] 季必发[1] 谢劲松[1] 尹奇异[1] 鲍巍涛[1] 

机构地区：[1]合肥学院化学与材料工程系,安徽合肥230601

出　　处：《稀土》2014年第1期24-29,共6页Chinese Rare Earths

基　　金：国家自然科学基金资助项目(51102073);安徽省自然科学基金项目(10040606Q53;1308085QB35);安徽省高等学校自然科学研究项目(KJ2012B154;KJ2013B229;KJ2012ZD15);地方高校国家级大学生创新创业训练计划项目(201211059006;201211059007);江苏省新型环保重点实验室开放课题基金(AE201361)资助

摘　　要：采用溶胶凝胶-自燃烧法合成了Ce0.8Y0.18Fe0.02O1.9纳米粉体,通过热重、X射线衍射、扫描电镜、透射电镜和交流阻抗谱等方法对试样进行研究。研究结果表明,采用溶胶凝胶-自燃烧法可直接合成纯相的具有立方萤石结构的固溶体Ce0.8Y0.18Fe0.02O1.9;合成粉体的平均粒径为10 nm^20 nm,具有高的烧结活性,在1400℃的烧结温度下,陶瓷样品的相对密度可达到97%;Ce0.8Y0.18Fe0.02O1.9电解质的离子导电性能良好,在600℃和800℃测试温度下,其电导率分别达到12.38 mS/cm和46.81 mS/cm。The nano- sized Ce0. 8Y0. 18Fe0. 02O1. 9powders were synthesized by sol- gel auto- combustion method. The samples were characterized by TG- DSC,X- ray diffraction,TEM,SEM and AC impedance spectroscope,respectively. The results demonstrate that the sol- gel auto- combustion process is a simple and efficient route to produce high reactive Ce0. 8Y0. 18Fe0. 02O1. 9powders. It was found that the Ce0. 8Y0. 18Fe0. 02O1. 9powders with a pure cubic fluorite phase could be produced via a combustion process. The Ce0. 8Y0. 18Fe0. 02O1. 9powders are composed of ultrafine particles in the range of 10 ~ 20 nm.This desired morphology effectively enhanced the sinterability of the powders. It can be sintered to a relative density of 97% at1400 ℃. Furthermore,the ceramic sintered at 1400℃ for 2h presented superior electrical conductivity,reaching 12. 38 and46. 81 mS / cm at the measuring temperatures of 600 and 800 ℃,respectively.

关 键 词：固体氧化物燃料电池 自燃烧 电解质 电导率 

分 类 号：TM911[电气工程—电力电子与电力传动]