Quantification of nonstoichiometry in ceramic grain boundary

晶体界面的原子和电子结构通常不同于单晶。因此，多晶材料通常可以带来与单晶不同的性能。在这项研究中，原子结构，电子结构和非化学计量界面附近的结合电子显微镜，光谱和理论计算进行了研究。通过该项目，揭示了逐位缺陷形成行为以及界面处的变形、化学键合和缺陷形成之间的关系。相信本课题的研究为通过控制界面非化学计量比来进行材料设计铺平了道路。

Atomic and electronic structures of crystal interfaces are usually different from that in a single crystal. Thus, the polycrystalline materials can often bring about different properties from that of the single crystals. In this study, atomic structure, electronic structure, and nonstoichiometry in the vicinity of the interface were investigated by combining electron microscopy, spectroscopy, and theoretical calculation. Through this project, the site-by-site defect formation behaviors and relationships between the distortion, chemical bonding, and defect formation at the interface were revealed. I believe that the way for the materials design by controlling the interface nonstoichiometry is paved by this project.