Sintering and Electronic Conducting Properties of La_(0.7)Ca_(0.3)CrO_3 Perovskite Synthesized by a Glycine-nitrate Process

作     者：陈新亮 徐庆 CHEN Xinliang XU Qing~ HUANG Duanping ZHANG Feng CHEN Wen(School of Materials Science and Engineering, Wuhan University of Technology,Wuhan 430070, China)

作者机构：School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070 China 

出 版 物：《Journal of Wuhan University of Technology(Materials Science)》 (武汉理工大学学报（材料科学英文版）)

年 卷 期：2006年第21卷第1期

页      面：53-56页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 070301[理学-无机化学] 

基　　金：Funded by the Programfor New Century Excellent Talents inUniversity(NCET-04-0724)and Special Research Foundforthe Doc-oral Program of High Education ( No.20030497008) .It is alsorateful to Hubei Province Key Laboratory of Refractories and Ce-amics-Ministry-Province Jointly-Constructed Cultivation Base fortate Key Laboratoryfor Supportingthe Research(No.G0406) 

主　　题：sintering glycine-nitrate process electrical conductivity perovskites 

摘      要：La0.7 Ca0.3 CrO3 powder consisting of superfine and uniform particles （ 100-200 nm ） were synthesized using a glycine-nitrate process （ GNP ）. The sintering and electronic conducting properties of La0.7 Ca0.3 CrO3 were invetigated in the sintering temperature range of 1 200-1 450 ℃. The desired morphology of the powder significantly improved its sinterability. La0.7 Ca0.3 CrO3 ceramics sintered at 1 250-1 450 ℃ show high relative densities above 95 % . The ceramics sintered at 1 250-1 400 ℃ have very similar electronic conduct- ing properties, providing electronic conductivities around 55 Ω^-1 cm^-1 at a measuring temperature of 800 ℃ . Further increasing the sintering temperature to 1450 ℃ led to an apparent degradation of electronic conducting properties. This research demonstrates the advantage of the GNP in producing La0.7 Ca0.3 CrO3 with respect to the enhanced sintering properties and superior electronic conducting properties.