High‐entropy oxides (HEOs) are a new class of materials promising for a wide range of applications. Designing HEOs needs to consider both geometric compatibility and electrical balance. However, there is currently no available method to systematically consider these two factors when selecting constituent materials for making HEOs. Here we propose a two‐step strategy, where a HEO system is first partitioned into multiple subsystems based on the valence combinations of constituted cations; the geometric compatibility is then considered in selecting suitable constituted cations. We demonstrate this strategy by using A(5B_0.2)O₃ perovskite as a model system. We show that the system can be partitioned into 12 subsystems. A single‐phase cubic perovskite has been synthesized in ten of the subsystems. We anticipate that this strategy is applicable to other oxide systems.

中文翻译：

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基于化合价的高熵氧化物：设计与实践

高熵氧化物（HEOs）是一类新型材料，有望在广泛的应用中使用。设计HEO需要同时考虑几何兼容性和电气平衡。然而，当前没有可用的方法在选择用于制造HEO的构成材料时系统地考虑这两个因素。在这里，我们提出了一个两步策略，其中，首先根据组成阳离子的化合价将HEO系统划分为多个子系统。然后在选择合适的构成阳离子时考虑几何相容性。我们通过使用A（5B _0.2）O ₃演示了此策略钙钛矿作为模型系统。我们展示了该系统可以划分为12个子系统。在十个子系统中已合成了单相立方钙钛矿。我们预计该策略适用于其他氧化物体系。