价(化学)
材料科学
化学计量学
组态熵
熵(时间箭头)
结晶学
热力学
化学
物理化学
物理
有机化学
作者
Jinxu Ma,Kepi Chen,Cuiwei Li,Xiaowen Zhang,Linan An
标识
DOI:10.1016/j.ceramint.2021.05.148
摘要
The valence-combination strategy was applied to design B-site substitution non-equimolar stoichiometric high-entropy perovskite oxides (HEPOs). 29, 56 and 29 valence combinations with the maximum configurational entropy higher than 1.5R for five-component HEPOs were identified when the average valence of B-site is 3, 4 and 5, respectively. Synthesis experiment was performed on 8 valence combinations with the average valence of B-site equal to 4. Single-phase HEPOs were obtained from 6 of them. It was also found that most of HEPOs have ordered structures. The formation of single-phase HEPO and ordered structure was discussed in terms of structural tolerance factor and valence-difference factor.
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