Composition-constrained rocksalt structure high entropy oxides with non-equimolar cations: Design and synthesis based on cluster-plus-glue-atom model
High entropy oxides (HEOs) are an emerging material that is rapidly becoming a worldwide research hotspot due to its unique properties. The concept of HEOs was proposed based on the increased configuration entropy (Sconf). However, in a single-phase oxide with large Sconf, there is reversible transi...
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Published in | Ceramics international Vol. 48; no. 17; pp. 25647 - 25650 |
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Main Authors | , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier Ltd
01.09.2022
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Subjects | |
Online Access | Get full text |
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Summary: | High entropy oxides (HEOs) are an emerging material that is rapidly becoming a worldwide research hotspot due to its unique properties. The concept of HEOs was proposed based on the increased configuration entropy (Sconf). However, in a single-phase oxide with large Sconf, there is reversible transition from multi-phase to single-phase at low calcination temperature. Here, through a solid-state reaction experiment, XRD and EDS mapping characterization, a series of non-equimolar Mg–Co–Ni–Cu–Zn–O HEOs with single-phase rocksalt structure was designed and developed based on a cluster-plus-glue-atom model. It found that entropy-predominated phase transition temperature between a multi-phase and single-phase can be controlled by component optimization, and the thermodynamic stability of the system is improved. |
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ISSN: | 0272-8842 1873-3956 |
DOI: | 10.1016/j.ceramint.2022.05.265 |