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基于材料基因组计划(MGI)研究方式,利用密度泛函理论(DFT)的第一性原理的总能量计算方法,以K2NiF4型La2BO4(B∶B位元素)相关的几种相结构为计算模型,针对4~6周期48种B位金属元素替换,进行几何优化的总能量计算,得到这些相关虚拟相结构的结合能随元素的变化规律.通过层状相La2BO4与立方相LaBO3的比较,着重讨论了一些重要B位元素(Fe、Co、Ni、Cu、Zn、Se)对稳定La2BO4复合氧化物相稳定性的影响作用和趋势.结合相关的实验数据,进一步讨论了掺杂B位元素的优化稳定区域.本定量分析方法为此类材料的合成和成份优化设计提供了一种行之有效的分析方法.

参考文献

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