Abstract
K(Nb1−xMnx)O3 (KN1−xMx) ceramics with 0.005 ≤ x ≤ 0.015 were sintered at 1020°C through a normal sintering process without the formation of a liquid phase. They exhibited double polarization versus electric field (P–E) hysteresis and sprout-shaped strain versus electric field (S–E) curves owing to the presence of a defect dipole (PD), which was formed between the acceptor Mn3+ ion and the oxygen vacancy. Moreover, the aging process was not required to develop the PD. The KN1−xMx ceramics exhibited a large strain of ~0.2% at 6.0 kV/mm. For the KN0.985M0.015 ceramic, this large strain was maintained after 104 cycles of an electric field of 6.0 kV/mm. This ceramic also maintained a double hysteresis curve at 200°C. Therefore, the KN0.985M0.015 ceramic has a large electric field-induced strain, along with good thermal and fatigue properties for multilayer piezoelectric actuators.
Original language | English |
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Pages (from-to) | 4031-4038 |
Number of pages | 8 |
Journal | Journal of the American Ceramic Society |
Volume | 99 |
Issue number | 12 |
DOIs | |
Publication status | Published - 2016 |
Bibliographical note
Publisher Copyright:© 2016 The American Ceramic Society
Keywords
- ferroelectricity/ferroelectric materials
- lead-free ceramics
- piezoelectric materials/properties
ASJC Scopus subject areas
- Ceramics and Composites
- Materials Chemistry