材料科学与工程学报2012，Vol.30Issue(3)：409-412,435,5.
CeO_2掺杂对La_（0.7）Ca_（0.3）CrO_（3-δ）低温烧结及电导性能的影响
Influence of CeO2-doping on Low-temperature Sintering Ability and Electrical Conductivity of La0.7Ca0.3CrO3-δ
摘要
Abstract
LaCrO3-based interconnect material for solid oxide fuel cells（SOFCs） is poorly sinterable in air and has relatively low electrical conductivity at intermediate temperatures.In this work,fine precursor powders of La0.7Ca0.3CrO3-δ were prepared by introducing an auto-ignition process,and then sintering in air at 1 400℃ for 4h using a small amount of CeO2 as sintering aid（2%-8%,weight percent）.Results indicate that the doped specimens sintered at 1 400℃ for 4h in air have high relative densities of no less than 95.4% and the grain size decreases with increasing the doping amount.The 2% CeO2-doped La0.7Ca0.3CrO3-δ sample has the highest electrical conductivity of 52.7 Scm-1 at 850℃ and 41.9Scm-1 at 500℃ in air,almost 2.5 times as high as that of La0.7Ca0.3CrO3-δ.Results indicate this interconnect composite is very suitable for intermediate temperature SOFCs.关键词
铬酸镧/烧结/电导率/固体氧化物燃料电池Key words
LaCrO3/sintering ability/electrical conductivity/SOFC分类
通用工业技术引用本文复制引用
王松林,凤仪,王东生,王泾文,孟广耀..CeO_2掺杂对La_（0.7）Ca_（0.3）CrO_（3-δ）低温烧结及电导性能的影响[J].材料科学与工程学报,2012,30(3):409-412,435,5.基金项目
国家自然科学基金资助项目 （）
安徽省自然科学基金资助项目 （）
安徽省高等学校省级优秀青年人才基金重点资助项目 （）
安徽省高等学校省级自然科学研究资助项目 （）
