项建英,陈树海,黄继华,梁文建,曹艳军

• 1:北京科技大学材料科学与工程学院

摘要(Abstract)：

采用固相合成制备了热障涂层陶瓷材料La2(Zr0.7Ce0.3)2O7(LZ7C3)。通过差热分析、X射线衍射等分析方法对固相合成行为影响因素进行研究,并用激光脉冲法和高温膨胀仪测试了LZ7C3粉末的热扩散系数和热膨胀系数。结果表明:完全合成LZ7C3的温度至少1400℃,煅烧时间至少5 h,反应粉末的粒度为0.82μm时,合成的LZ7C3粉末X射线衍射图谱没有La2 O3残留峰,其La∶Zr∶Ce为50.09∶35.12∶14.79,非常接近理论原子比例10∶7∶3;LZ7C3的热导率在1200℃时为0.79 W.m-1.K-1,热膨胀系数在1200℃时为11.6×10-6K-1,从室温到1200℃的加热过程中没有失重和相变发生,具有较高的相稳定性。

关键词(KeyWords)： 热障涂层;LZ7C3;固相合成;热导率;热膨胀系数

Abstract:

Keywords:

基金项目(Foundation): 国家重点基础研究发展计划资助课题(61311203B)

作者(Author): 项建英,陈树海,黄继华,梁文建,曹艳军

DOI: 10.13289/j.issn.1009-6264.2012.10.003

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