稀土复合掺杂钙钛矿型阴极材料制备工艺的研究  

Preparation Technology of Rare Earth Composite Doped Perovskite Cathode Material

作　　者：高文元[1] 孙俊才[1] 

机构地区：[1]大连海事大学材料工艺研究所

出　　处：《稀土》2005年第3期30-34,共5页Chinese Rare Earths

基　　金：国家"863"计划项目(2001AA515080);瑞典亚洲合作计划项目(DNR6964)

摘　　要：采用传统固相反应法制备了中温固体氧化物燃料电池中的稀土复合掺杂钙钛矿型阴极材料。借助XRD、DTA、SEM等分析仪器研究和讨论了不同元素、不同成分、不同焙烧温度、不同保温时间对所制备材料性能的影响。结果表明:该类材料的固相反应温度范围为:1000℃～1300℃;适宜的保温时间为10h;反应物经混合、压片、烧成和研磨可以合成晶粒尺寸为1nm～5nm的粉料,对ABO3型LaMnO3进行复合掺杂,表明A位Sr2+、Ca2+共同掺杂取代部分La3+以及B位Co3+、Fe3+双掺杂都能够提高材料的电导率。The rare earth composite doped perovskite type materials as the candidate cathode materials for intermediate temperature solid oxide fuel cell were prepared based on the doping theory using traditional solid state reaction method.The effects of the different elements,the different compositions,the calcination temperature,and the holding time on the materials properties have been investigated with XRD,DTA and SEM.The experimental result showed that the calcination temperatures of these materials are 1000℃~1300℃;The perfect holding time is 10h;Through mixing,milling,pressing the starting materials into pellets and calcination can obtain the product with the grain size 1~5nm.The electrical conductivity of rare earth composite doped LaMnO_3 materials can be increased by co-doping Ca^(2+)and Sr^(2+) in A site for part La^(3+) or by doping Co^(3+) and Fe^(3+) being in place of Mn^(3+).

关 键 词：掺杂 固相反应 钙钛矿 阴极材料 电导率 

分 类 号：TM911.4[电气工程—电力电子与电力传动]