Manipulating temperature stability in KNN-based ceramics via defect design

The designed defect-engineering has been proved to be an effective way to promote properties in potassium sodium niobate (KNN)-based ceramics. Here, we focus on the introduction of Fe element into different sites of KNN-based ceramics to form defects and optimize properties. Two types of defect dipoles can be formed, FeA..−VA′ for A-site and FeNb″−VO.. for B-site. Compared with the defect dipoles of A-site, the defect dipoles of B-site are...