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(Na 1/2 Bi 1/2 )TiO 3 ‐based lead‐free co‐fired multilayer actuators with large strain and high fatigue resistance
Author(s) -
Zhang Haibo,
Ma Weigang,
Xie Bing,
Zhang Ling,
Dong Shuxiang,
Fan Pengyuan,
Wang Ke,
Koruza Jurij,
Rödel Jürgen
Publication year - 2019
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.16499
Subject(s) - materials science , composite material , ceramic , strain (injury) , actuator , microstructure , dielectric , displacement (psychology) , electrode , optoelectronics , electrical engineering , medicine , psychology , chemistry , psychotherapist , engineering
Large‐strain multilayer actuators (MLAs) were fabricated by tape‐casting 0.91(Na 1/2 Bi 1/2 )TiO 3 –0.06BaTiO 3 –0.03AgNbO 3 (NBT‐BT–3AN) lead‐free incipient piezoceramics co‐fired with Pt inner electrodes. Microstructures, dielectric properties, unipolar and bipolar strain, as well as fatigue properties of the MLAs were investigated. It was found that the actuator consisting of 15 ceramic layers with individual thicknesses of 114 μm could output a large unipolar strain of 0.3% and a dynamic displacement of 5 μm at 6 kV/mm at room temperature. It exhibited excellent cycling stability and provided a high strain of 0.23% after 10 7 cycles at 6 kV/mm. Moreover, these MLAs still can deliver a strain of 0.20% at 125°C.