NOMATEN published a new manuscript in Materials & Design entitled: Toward predictable phase structures in high-entropy oxides: A strategy for screening multicomponent compositions
Authors: Yulin Li (NOMATEN); Haixian Yan (Southeast University), Shiqi Wang (University of Helsinki); Xuliang Luo(Aalto University), Łukasz Kurpaska(NOMATEN), Feng Fang (Southeast University), Jianqing Jiang (Nanjing Forestry University), Hyoung Seop Kim (Pohang University of Science and Technology), Wenyi Huo (Nanjing Forestry University & NOMATEN)
Abstract: The recent surge in interest in high-entropy #oxides (#HEOs) as a novel class of #ceramic #materials can be attributed to the remarkable performance enhancements caused by both the complexity of their chemical composition and the simplicity of their #structure. The extensive range of components presents challenges to the implementation of HEOs, rendering it difficult to predict the phase structure prior to the final #synthesis. Herein, semi-empirical methods based on various parameters, including ΔX, VEC, ΔSmix, ΔHmix and δ, were utilized to determine the phase stability of #rocksalt, #spinel, #perovskite and #fluorite structures. The combination of δ with ΔX, VEC, ΔSmix, and ΔHmix, in graphical form, is an effective indicator for determining the phase stability of rock salt, perovskite and fluorite structures. The spinel structure is stabilized outside the range of the other three structures. The phase formation rules were further verified with two newly designed and prepared HEOs via X-ray diffraction and high-resolution transmission electron microscopy. The HEOs show potential for functional applications, e.g., methyl orange degradation.
Read the full paper here: https://lnkd.in/dPpxHAEV
