无机材料学报 ›› 2012, Vol. 27 ›› Issue (2): 209-213.DOI: 10.3724/SP.J.1077.2012.00209 CSTR: 32189.14.SP.J.1077.2012.00209

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Y2O3与Gd2O3共掺杂SrZrO3热障涂层材料的热物理性能

马 文1, 宋峰雨1, 董红英2, 许 萍1, 伦文山1, 郑学斌3   

  1. (1. 内蒙古工业大学 材料科学与工程学院, 呼和浩特 010051; 2. 内蒙古工业大学 化工学院, 呼和浩特 010051;  3. 中国科学院 上海硅酸盐研究所, 特种无机涂层重点实验室, 上海 200050)
  • 收稿日期:2011-02-12 修回日期:2011-03-23 出版日期:2012-02-10 网络出版日期:2012-01-05
  • 基金资助:
    国家自然科学基金(51062012);教育部重点项目(210035);内蒙古自然科学基金(2009BS0802);中国科学院特种无机涂层重点实验室开放课题基金

Thermophysical Properties of Y2O3 and Gd2O3 Co-doped SrZrO3 Thermal Barrier Coating Material

MA Wen1, SONG Feng-Yu1, DONG Hong-Ying2, XU Ping1, LUN Wen-Shan1, ZHENG Xue-Bin3   

  1. (1. School of Materials Science and Engineering, Inner Mongolia University of Technology, Huhhot 010051, China; 2. School of Chemistry Engineering, Inner Mongolia University of Technology, Huhhot 010051, China; 3. Key Laboratory of Inorganic Coating Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China)
  • Received:2011-02-12 Revised:2011-03-23 Published:2012-02-10 Online:2012-01-05
  • Supported by:
    National Natural Science Foundation of China (51062012);Key Project of Chinese Ministry of Education (210035);Natural Science Foundation of Inner Mongolia (2009BS0802);Opening Project of Key Laboratory of Inerganic Cating Materials, Chinese Academy of Sciences

摘要:

采用固相反应法合成了5mol% Y2O3与5mol% Gd2O3共掺杂SrZrO3(Sr(Zr0.9Y0.05Gd0.05)O2.95, SZYG)粉末. 采用X射线衍射(XRD)和差示扫描量热仪(DSC)分别研究了SZYG粉末在1450℃长期热处理后以及200~1400℃范围内的相稳定性. 采用高温热膨胀仪测量了SZYG块材的热膨胀系数, 结果表明: 通过Y2O3与Gd2O3共掺杂改性可以明显抑制SrZrO3的相转变. 在1000℃下SZYG块材的热导率是~1.36 W/(m·K), 与SrZrO3和8YSZ 块材相比降低~35% SZYG分别与8YSZ和Al2O3在1250℃热处理24 h表现出很好的化学相容性.

关键词: 热障涂层, 钙钛矿, 热物理性能, 稀土氧化物

Abstract:

Y2O3 (5mol%) and Gd2O3 (5mol%) co-doped SrZrO3 (Sr(Zr0.9Y0.05Gd0.05)O2.95, SZYG) was synthesized by solid state reaction method. The phase stability of the SZYG powder synthesized at high temperature of 1450℃ for a long period and at temperature range of 200-1400℃ was characterized by XRD and DSC, respectively. The coefficients of thermal expansion (CTEs) of bulk SZYG recorded by a high-temperature dilatometer show that the phase transitions of SrZrO3 is suppressed remarkably by co-doping Y2O3 and Gd2O3. The thermal conductivity of bulk SZYG at 1000℃ is 1.36 W/(m·K), which is 35% lower than that of bulk SrZrO3 and 8YSZ. The good chemical compatibility of SZYG with 8YSZ and Al2O3, is detected after heat-treatment at 1250℃ for 24 h.

Key words: thermal barrier coatings, perovskite, thermophysical properties, rare earth oxides

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