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Licensed Unlicensed Requires Authentication Published by De Gruyter March 16, 2020

Facile preparation of single phase high-entropy oxide nanocrystalline powders by solution combustion synthesis

Hou-Zheng Xiang, Hong-Xiang Xie, Aiqin Mao, Yang-Gang Jia and Ting-Zhi Si

Abstract

High-entropy oxides (HEOs), due to their excellent physicochemical properties, have attracted extensive attention. In this work, the solution combustion synthesis approach was applied to prepare a series of porous single-phase HEO nanocrystalline powders. Equiatomic (Co0.2Cu0.2Mg0.2Ni0.2Zn0.2)O, (Cr0.2Fe0.2Mn0.2Mg0.2Zn0.2)3O4 and (Ce0.2La0.2Pr0.2Sm0.2Y0.2)O2 were successfully obtained. While the former two could be stabilized into single rock-salt (Fm-3m) and spinel (Fd-3m) structures, the latter could be synthesized to have either CaF2-type (Fm-3m) or CaF2-related-type (Ia-3) structure depending on synthesis temperature. Furthermore, their chemical and microstructural homogeneity was further confirmed.


Correspondence address, Aiqin Mao, School of Materials Science and Engineering, Anhui University of Technology, Maxiang Road, Xincheng East District, Ma'anshan Anhui, 243032, P.R. China, Tel./Fax.: +86-555-2311570, E-mail:
∗∗ Ting-Zhi Si, School of Materials Science and Engineering, Anhui University of Technology, Maxiang Road, Xincheng East District, Ma'anshan Anhui, 243032, P.R. China, Tel./Fax.: +86-555-2311570, E-mail:

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Received: 2019-07-11
Accepted: 2019-09-24
Published Online: 2020-03-16
Published in Print: 2020-03-11

© 2020, Carl Hanser Verlag, München