Journal of Inorganic Materials ›› 2021, Vol. 36 ›› Issue (4): 418-424.DOI: 10.15541/jim20200367

• RESEARCH PAPER • Previous Articles     Next Articles

Preparation of (La0.2Nd0.2Sm0.2Gd0.2Er0.2)2Zr2O7 High-entropy Transparent Ceramics by Vacuum Sintering

ZENG Jianjun1(), ZHANG Kuibao1,2(), CHEN Daimeng1, GUO Haiyan1, DENG Ting1, LIU Kui1   

  1. 1. State Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China
    2. Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang 621010, China
  • Received:2020-07-02 Revised:2020-09-18 Published:2021-04-20 Online:2020-10-30
  • Contact: ZHANG Kuibao, professor. E-mail: xiaobao320@163.com
  • About author:ZENG Jianjun(1997-), male, Master candidate. E-mail: zeng_jianjun@126.com
  • Supported by:
    Natural Science Foundation of China(51672228);Project of State Key Laboratory of Environment-friendly Energy Materials(Southwest University of Science and Technology)(18FKSY0214);Project of State Key Laboratory of Environment-friendly Energy Materials(Southwest University of Science and Technology)(20fksyII)

Abstract:

High-entropy ceramic is a hot topic in the recent study of ceramic materials. High-entropy ceramics with excellent properties is the development trend of ceramic materials. In this research, high-entropy transparent ceramic was synthesized by combustion method combined with vacuum sintering. The result indicates that the mean grain size of high-entropy (La0.2Nd0.2Sm0.2Gd0.2Er0.2)2Zr2O7 powder is about 8 nm. And the high-entropy powder is disordered deficient fluorite structure. The final transparent ceramics sintered in vacuum furnace at different temperatures exhibit ordered pyrochlore structure. Sintering temperature has little effect on the transmittance of ceramics. And the in-line transmittance of as-prepared transparent ceramic can reach 74% at 1730 nm. There are many absorption peaks in the transmittance spectrum. With the increase of sintering temperature, the body density and grain size of ceramics increase, but the HV hardnesses decrease.

Key words: high-entropy, transparent ceramic, pyrochlore

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