Ferroelectric Polarization Dependent Piezoelectric Hardening in BiFeO3-BaTiO3 Lead-Free Ceramics

被引：2
作者：
Lee, Myang Hwan [1 ]
Choi, Hae In [1 ]
Kim, Da Jeong [1 ]
Kim, Ji Su [1 ]
Lee, Sang Woo [2 ]
Park, Yubin [2 ]
Yang, Sang Mo [2 ]
Song, Tae Kwon [1 ]
机构：
[1] Changwon Natl Univ, Sch Mat Sci & Engn, Dept Mat Convergence & Syst Engn, Chang Won 51140, Gyeongnam, South Korea
[2] Sogang Univ, Dept Phys, Seoul 04107, South Korea
来源：
ADVANCED ELECTRONIC MATERIALS | 2024年 / 10卷 / 09期
基金：
新加坡国家研究基金会;
关键词：
aging; ceramics; defect; domain wall; ferroelectric; internal field; piezoelectric; INTERNAL BIAS;
D O I：
10.1002/aelm.202300902
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The relation between the improvement of mechanical quality factor (Q(m)) and internal electric field (E-i) generated during the aging process in lead-free piezoelectric BiFeO3-BaTiO3 ceramics is investigated for hard piezoelectric application of power transducers. The change of built-in E-i depends on the ferroelectric polarization (P) direction during the aging process. For the aging process with P parallel to E-i, Q(m) and E-i increases but Q(m) and E-i decreases with P antiparallel to E-i. These results are attributed to the migration of defects by depolarization fields and domain-wall pinning. This work provides the systematic guidance to develop high-power piezoelectric transducers with lead-free ceramics.
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页数：7
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