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Large and Stable Shape Memory Effect Realized by Defect Dipoles in Acceptor‐Doped Ferroelectric Ceramics
Author(s) -
Yan Yangxi,
Feng Yujun
Publication year - 2016
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.13942
Subject(s) - poling , materials science , shape memory alloy , piezoelectricity , electric field , dipole , ferroelectricity , doping , ceramic , shutter , actuator , ferroelectric ceramics , acceptor , composite material , condensed matter physics , optoelectronics , dielectric , optics , chemistry , electrical engineering , physics , organic chemistry , quantum mechanics , engineering
A large and stable shape memory effect has been observed in 0.6 wt% Mn‐doped (Pb 0.99 Nb 0.02 )[(Zr 0.70 Sn 0.30 ) 0.52 Ti 0.48 ] 0.98 O 3 (Mn: PNZST ) ceramics after being poled at high temperature. A maximum shape memory of 0.41% was achieved. This effect is related to the preferentially oriented defect dipoles along the poling direction after poling at high temperature and electric field. Furthermore, the shape memory effect is stable after 10 4 electric cycles at 30 kV/cm. The shape memory piezoelectric actuator may be fabricated using this kind of material.