Preparation and Thermophysical Properties of( Sm0.5La0.5)2Ce2O7

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Preparation and Thermophysical Properties of( Sm0.5La0.5)2Ce2O7

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[1]ZHANG Hongsong,WEN Qian,ZHANG Bing.Preparation and Thermophysical Properties of( Sm0.5La0.5)2Ce2O7[J].Journal of Zhengzhou University (Engineering Science),2014,35(06):19-22.[doi:10.3969/j.issn.1671-6833.2014.06.005]

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Journal of Zhengzhou University (Engineering Science)[ISSN 1671-6833/CN 41-1339/T] Volume: 35 Number of periods: 2014 06 Page number: 19-22 Column: Public date: 2014-11-25

Title:: Preparation and Thermophysical Properties of( Sm0.5La0.5)2Ce2O7

Author(s):: ZHANG Hongsong; WEN Qian; ZHANG Bing; 1. Department of Mechanical Engineering, Henan institute of Engineering, 2hengzhou 451191, China; 2.Sehool of Chemistry and Energy,Zhengzhou Unversity,Zhengzhou 450001.China

Keywords:: thermal barrier coaling; rare earh cerium oxide; thermal conductivity; thermal expansion coellicient

CLC:: TG174.75

DOI:: 10.3969/j.issn.1671-6833.2014.06.005

Abstract:: In this paper, the ( Sm0.5La0.2)2Ce2O2 ceramie was synthesized by solid reacion using La2O3, Sm2O3 and CeO2 as raw materials. lts phase composition mierostruclure and composiion was analyzed by X-raydillraetion, seanning eleetrieal mieroseope ( SEM) and eleetronie difraction spectrum ( EDs), respeetively.Its thermal diffusivity and thermal expansion eoellicient are measured by laser flash method and pushing rodtechnique. Research results show that synthesized ( Sm0.5La0.2)2Ce2O2 ceramie has single fluorite structureand dense mieroslruclure. No other phase or un-reacted oxides exist in the interlaees between grains. lts loweithermal conduelivity and higher thermal expansion coelfcient can be attributed to the La-doping.

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