Journal of the Chinese Ceramic Society, Volume. 52, Issue 9, 3074(2024)

Research and Development of High Entropy Ferroelectrics

ZHOU Donghuan1, CHEN Liang1, QI He1, and CHEN Jun1,2、*
Author Affiliations
  • 1[in Chinese]
  • 2[in Chinese]
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    Ferroelectric materials are widely used in various electronic functional materials and devices due to their excellent energy conversion and storage functions, which mainly depends on the crystal structure gene of ferroelectric materials, named as polarization configuration. Traditional phase boundary construction strategies were not flexible enough in regulating polarization configuration, and the improvement on the electrical properties of materials was also limited for the requirements of miniaturization and integration of next-generation devices.Recently, researchers introduced the high-entropy strategy into ferroelectric materials and systematically studied the regulation mechanism of local polarization configuration. Theoretical and experimental results showed that, when retaining the traditional high-entropy effect, the high-entropy strategy could also fully utilize the comprehensive factors of atomic ferroactivity and radius for the directional design of ferroelectric functional elements (local polarization configuration and oxygen octahedron tilt), effectively improved the flexibility of external field response, and then significantly improved the related electrical properties. Materials with both high chemical disorder and high ferroelectric functional element disorder can be called “high-entropy FEs”. A series of researches have been carried on the ferroelectrics via the high-entropy strategy, and varieties of high-performance functional materials were designed and prepared.In this paper, the polarization configuration, acted as the core functional unit, is firstly introduced to achieve the diversity of physical properties in ferroelectric materials and the crucial role in regulating material’s properties. Then the mechanism of improving the performance of high-entropy FEs by adjusting the polarization configuration through the high-entropy strategy is discussed;Finally, the research on controlling the polarization configuration of ferroelectrics using the high-entropy strategy to enhance their performance is summarized and categorized, which demonstrated that the high-entropy strategy could improve the performance of ferroelectric materials in a feasibility and broad prospects. Finally, four directions of high-entropy strategy for enhancing material performance, including piezoelectric performance, large electrostriction, excellent energy storage, and refrigeration with large electrocaloric effect are introduced.

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    ZHOU Donghuan, CHEN Liang, QI He, CHEN Jun. Research and Development of High Entropy Ferroelectrics[J]. Journal of the Chinese Ceramic Society, 2024, 52(9): 3074

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    Paper Information

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    Received: Nov. 19, 2023

    Accepted: --

    Published Online: Nov. 8, 2024

    The Author Email: Jun CHEN (junchen@ustb.edu.cn)

    DOI:10.14062/j.issn.0454-5648.20230889

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