材料科学
氧化物
煅烧
星团(航天器)
组态熵
熵(时间箭头)
热力学
相变
物理化学
化学物理
化学
物理
催化作用
冶金
计算机科学
程序设计语言
生物化学
作者
Yue Yu,Shimin Liu,Yuanwen Ren,Zelin Xia,Shuang Zhang,Nan Wang,Hualin Wang,Weiwei Jiang,Chaoqian Liu,Wanyu Ding,Zhihua Zhang,Dong Chen
标识
DOI:10.1016/j.ceramint.2022.05.265
摘要
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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