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Bipolar and Unipolar Fatigue of Ferroelectric BNT‐Based Lead‐Free Piezoceramics
Author(s) -
Luo Zhenhua,
Glaum Julia,
Granzow Torsten,
Jo Wook,
Dittmer Robert,
Hoffman Mark,
Rödel Jürgen
Publication year - 2011
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/j.1551-2916.2010.04101.x
Subject(s) - materials science , ferroelectricity , lead (geology) , polarization (electrochemistry) , cycling , relaxor ferroelectric , composite material , signal (programming language) , degradation (telecommunications) , optoelectronics , electrical engineering , chemistry , dielectric , archaeology , engineering , geomorphology , computer science , history , programming language , geology
The bipolar and unipolar fatigue behavior of the lead‐free piezo‐ and ferroelectric 0.94Bi 1/2 Na 1/2 TiO 3 –0.06BaTiO 3 (94BNT–6BT) was investigated. To obtain a complete profile of the fatigue behavior, both large‐signal (polarization, strain) and small‐signal ( d 33 , ɛ 33 ) properties were measured at room temperature. The results indicate that the material suffers a significant degradation in both large‐ and small‐signal properties after cycling, with most of the fatigue occurring in the first 10 4 cycles of the fatigue test.