fig11
Figure 11. Effect of defect dipoles and space charges on the temperature stability of KNN ceramics. (A) Temperature-dependent bipolar strain of KNN-BNH-0.05Fe ceramics. (B) Variation of Ei for different dopants at different temperatures. (C) Temperature-dependent resistance comparison for different compositions at high temperatures. (D) Schematic diagrams of ferroelectric domain alignment and defect dipole behavior under an external electric field. This figure quoted with permission[35]. Copyright 2021, Elsevier Ltd.
