Journal of Inorganic Materials ›› 2021, Vol. 36 ›› Issue (11): 1231-1236.DOI: 10.15541/jim20210150

• RESEARCH LETTER • Previous Articles    

Microstructure and Properties of ZrO2-AlN Composite Ceramics by Microwave Sintering

MU Tinghai1,2(), XU Wentao2,3, LING Junrong2, DONG Tianwen2, QIN Zixuan2, ZHOU Youfu2,3()   

  1. 1. College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, China
    2. Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
    3. Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350108, China
  • Received:2021-03-11 Revised:2021-04-12 Published:2021-11-20 Online:2021-05-10
  • Contact: ZHOU Youfu, professor. E-mail:
  • About author:MU Tinghai (1995-), male, Master candidate. E-mail:
  • Supported by:
    Strategic Priority Research Program of the Chinese Academy of Sciences(XDB20010300, XDA21010204);Adv. Energy Sci. & Technol. Guangdong Lab(Open laboratory)


Zirconia (ZrO2) ceramics have excellent mechanical properties, but its application is limited by ZrO2-AlN low thermal conductivity (TC). Zirconia-aluminum nitride (AlN) composite ceramics ZrO2-AlN with high TC were designed and successfully fabricated by microwave sintering. After optimization of preparation conditions, the reaction between two substances was inhibited and the dense composite (relative density>99%) was obtained. The microstructure evolution, thermal behavior and mechanical properties were investigated in detail. The room temperature thermal conductivity, thermal diffusion coefficient and thermal capacity of ZrO2-AlN composites increase with AlN content increasing, reaching 41.3 W/(m·K), 15.2 mm2/s and 0.6 J/(g·K), respectively. Such ZrO2-AlN composites with high thermal conductivity and improved thermal shock resistance have broad application prospects in the field of high temperature heat exchange materials of energy systems.

Key words: zirconia, aluminum nitride, composite ceramic, microwave sintering, thermal conductivity

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