Journal of Inorganic Materials ›› 2012, Vol. 27 ›› Issue (2): 209-213.doi: 10.3724/SP.J.1077.2012.00209

• Orginal Article • Previous Articles     Next Articles

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

Wen MA1, Feng-Yu SONG1, Hong-Ying DONG2, Ping XU1, Wen-Shan LUN1, Xue-Bin ZHENG3   

  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 Online:2012-02-10 Published: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

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

CLC Number: 

  • TG174