Preparation and Microwave Absorption Properties of (Fe, Co, Ni, Cu, Zn)CrxOy High-Entropy Multiphase Ceramics

被引：0
作者：
Li D. [1 ]
Yan Z. [1 ]
Zhao B. [1 ]
Guan L. [1 ]
Fan B. [2 ]
Wang H. [2 ]
Zhang R. [1 ,2 ,3 ]
机构：
[1] School of Material, Zhengzhou University of Aeronautics, Zhengzhou
[2] School of Material Science and Engineering, Zhengzhou University, Zhengzhou
[3] Luoyang Institute of Science and Technology, Luoyang
来源：
Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | 2022年 / 50卷 / 06期
关键词：
Dielectric loss; Electromagnetic wave absorption property; High-entropy ceramics; Perovskite structure; Spinel structure;
D O I：
10.14062/j.issn.0454-5648.20211179
中图分类号：
学科分类号：
摘要：
Based on the in-depth study of high-entropy alloys, a concept of configuration entropy stable single phase is introduced into inorganic non-metallic materials, thus developing high-entropy ceramics. The advantage of high-entropy ceramics is the diversity of composition and structure, which makes them have an application potential as functional materials. In this paper, high-entropy multiphase ceramics with a spinel structure and a perovskite structure were synthesized by a simple solid-state sintering method. The phase composition, microstructure, element content and valence state, and electromagnetic wave absorption properties were investigated. The microwave absorption properties of high-entropy multiphase ceramics sintered at different temperatures were analyzed. The results show that the high-entropy multiphase ceramics can be prepared, and two crystal structures (i.e., spinel structure and perovskite structure) can be formed due to the high-entropy effect. At 1300℃, there exists a maximum dielectric constant. The high-entropy multiphase ceramics prepared have the optimum electromagnetic wave absorption performance when the frequency range is 8.2-12.4GHz. © 2022, Editorial Department of Journal of the Chinese Ceramic Society. All right reserved.
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页码：1489 / 1498
页数：9
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