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.

引用

页码：1489 / 1498

页数：9

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