Issue 39, 2019

Review of high entropy ceramics: design, synthesis, structure and properties

Abstract

High entropy ceramics are novel materials with no less than four different cations or anions. The development of high entropy ceramics follows the ‘configurational entropy stabilized single phase’ concept, which was first demonstrated for high entropy metal alloys in 2004. The advantages of high entropy ceramics are their compositional and structural diversity, and many of them have a band gap, which makes them potential functional materials for a wide range of applications. They have recently generated significant interest with the publication of 70+ related papers since 2015. In this review we have summarized the recent progress in this rapidly growing field. We emphasize the progress by researchers to answer the following three fundamental questions for high entropy ceramics: (1) which combinations of cations or anions can be synthesized as single-phase materials; (2) are the component elements truly random down to the atomic scale; and (3) what new physics, properties and applications will the incorporation of multi-elements elements bring. These fundamental questions are still open at this stage and warrant further studies. The objective of this review is to give a comprehensive overview of the literature to date on high entropy ceramics and to guide further investigation in this emerging field.

Graphical abstract: Review of high entropy ceramics: design, synthesis, structure and properties

Article information

Article type
Review Article
Submitted
28 Maijs 2019
Accepted
23 Jūl. 2019
First published
20 Sept. 2019
This article is Open Access
Creative Commons BY license

J. Mater. Chem. A, 2019,7, 22148-22162

Review of high entropy ceramics: design, synthesis, structure and properties

R. Zhang and M. J. Reece, J. Mater. Chem. A, 2019, 7, 22148 DOI: 10.1039/C9TA05698J

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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