Journal of the Chinese Ceramic Society, Volume. 50, Issue 6, 1489(2022)
Preparation and Microwave Absorption Properties of (Fe, Co, Ni, Cu, Zn)CrxOy High-Entropy Multiphase Ceramics
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 1 300 ℃, there exists a maximum dielectric constant. The high-entropy multiphase ceramics prepared have the optimum electromagnetic wave absorption performance when the frequency range is 8.2-12.4 GHz.
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LI Depeng, YAN Zhikai, ZHAO Biao, GUAN Li, FAN Bingbing, WANG Hailong, ZHANG Rui. Preparation and Microwave Absorption Properties of (Fe, Co, Ni, Cu, Zn)CrxOy High-Entropy Multiphase Ceramics[J]. Journal of the Chinese Ceramic Society, 2022, 50(6): 1489
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Received: Dec. 31, 2021
Accepted: --
Published Online: Dec. 6, 2022
The Author Email: Depeng LI (18346027982@163.com)
CSTR:32186.14.