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Dynamic hysteresis relation for guiding poling condition of high-performance KNN-based ceramics

2023; Elsevier BV; Volume: 43; Issue: 9 Linguagem: Inglês

10.1016/j.jeurceramsoc.2023.03.019

1873-619X

Yang Liu, Bingzhong Shen, Jinhui Fan, Xudong Qi, Enwei Sun, Rui Zhang,

Microwave Dielectric Ceramics Synthesis

Currently, the poling condition selection for KNN-based ceramics still requires an inefficient and time-consuming empirical attempt process owing to the lack of relevant theoretical guidance. Herein, the dynamic hysteresis relations and polarization reversal behavior of KNNS-BNZ-Ba ceramics were explored to guide the poling condition selection. The scaling relations of the loop area on electric field amplitude E0 and frequency f were determined. The three-stages E0-dependent scaling relation and two-stages f-dependent scaling relation (at the high electric field) were clarified. The relevance between hysteresis dynamics and poling process was analyzed. It suggested that the optimal poling field amplitude corresponds to the terminal electric field of non-180° domain switching. Meanwhile, excellent electromechanical properties (d33 = 408 pC/N, kp = 51%, and k33 = 69%) were achieved in KNNS-BNZ-Ba ceramics. Our work provides a scientific theory to guide the poling technology in KNN-based ceramics by exploring the polarization reversal kinetics.