Journal of Inorganic Materials ›› 2021, Vol. 36 ›› Issue (4): 379-385.DOI: 10.15541/jim20200500

Special Issue: 【结构材料】高熵陶瓷 【能源环境】钙钛矿

• RESEARCH PAPER • Previous Articles     Next Articles

Preparation and Property of High Entropy (La0.2Li0.2Ba0.2Sr0.2Ca0.2)TiO3 Perovskite Ceramics

ZHANG Xiaoyan1,2,3(), LIU Xinyue1,2, YAN Jinhua1,2, GU Yaohang1,2, QI Xiwei3,4()   

  1. 1. School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China
    2. School of Resources and Materials, Northeastern University at Qinhuangdao Branch, Qinhuangdao 066004, China
    3. Key Laboratory of Dielectric and Electrolyte Functional Material, Qinhuangdao 066004, China
    4. College of Metallurgy and Energy, North China of Science and Technology, Tangshan 063210, China
  • Received:2020-08-28 Revised:2020-09-29 Published:2021-04-20 Online:2020-10-30
  • Contact: QI Xiwei, professor. E-mail:
  • About author:ZHANG Xiaoyan(1982-), female, associate professor. E-mail:
  • Supported by:
    Natural Science Foundation of China(51972048)


High entropy ceramic is a kind of ceramic developed based on the high entropy alloy in recent years. The appearance of high entropy ceramics provides a new concept and route for developing non-metallic materials with excellent properties. In present work, a series of high-entropy ceramics with a molar ratio of A site—(La0.2Li0.2Ba0.2Sr0.2Ca0.2)TiO3 were successfully synthesized by solid state reaction. The effects of sintering temperature on phase, microstructure and electric properties were investigated. Results show that the high-entropy ceramics sintered at current temperatures are of cubic perovskite structure, and exhibit excellent insulation, with low leakage current density of J value around 10-8-10-6 A/cm2. Although the grain size increases with the increase of sintering temperature, the correlation between microstructure and dielectric properties of (La0.2Li0.2Ba0.2Sr0.2Ca0.2)TiO3 ceramics is not significant. The dielectric constant reaches its maximum value at 1350 ℃, with the value of 230 at the frequency of 100 Hz. Meanwhile, this high-entropy ceramic has relaxation behavior, and the relaxation peak of the permittivity moves towards high temperature with the increase of frequency.

Key words: high-entropy ceramics, perovskite, dielectric property

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