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Fatigue of Lead Zirconate Titanate Ceramics. I: Unipolar and DC Loading
Author(s) -
Balke Nina,
Lupascu Doru C.,
Granzow Torsten,
Rödel Jürgen
Publication year - 2007
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.1551-2916.2007.01520.x
Subject(s) - lead zirconate titanate , materials science , dc bias , hysteresis , ferroelectricity , polarization (electrochemistry) , dielectric , composite material , ceramic , actuator , asymmetry , offset (computer science) , amplitude , ferroelectric ceramics , voltage , condensed matter physics , optoelectronics , electrical engineering , optics , chemistry , physics , programming language , quantum mechanics , computer science , engineering
In actuator applications, a degradation of the ferroelectric material occurs both under unipolar cycling as well as DC loads. The developing material state is characterized by measurements of large and small signal unipolar as well as bipolar hysteresis loops. While the unipolar loops indicate a small decrease in strain and polarization amplitudes, the bipolar loops unveil the development of an offset field, an offset polarization, and an asymmetry in the hysteresis of strain and dielectric constant. A mechanism for unipolar fatigue is suggested to explain the observed changes in material properties with cyclic loading.