Journal of Inorganic Materials, Volume. 36, Issue 4, 379-2103221403-2(2021)

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

Xiaoyan ZHANG1...2,3, Xinyue LIU1,2, Jinhua YAN1,2, Yaohang GU1,2, and Xiwei QI34,* |Show fewer author(s)
Author Affiliations
  • 11. School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China
  • 22. School of Resources and Materials, Northeastern University at Qinhuangdao Branch, Qinhuangdao 066004, China
  • 33. Key Laboratory of Dielectric and Electrolyte Functional Material, Qinhuangdao 066004, China
  • 44. College of Metallurgy and Energy, North China of Science and Technology, Tangshan 063210, China
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    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.

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    Xiaoyan ZHANG, Xinyue LIU, Jinhua YAN, Yaohang GU, Xiwei QI. Preparation and Property of High Entropy (La0.2Li0.2Ba0.2Sr0.2Ca0.2)TiO3 Perovskite Ceramics[J]. Journal of Inorganic Materials, 2021, 36(4): 379-2103221403-2

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    Paper Information

    Category: RESEARCH PAPER

    Received: Aug. 28, 2020

    Accepted: --

    Published Online: Nov. 24, 2021

    The Author Email: QI Xiwei (qixiwei@mail.neu.edu.cn)

    DOI:10.15541/jim20200500

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