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Electric Fatigue in Lead Zirconate Titanate Ceramics
Author(s) -
Jiang Qiyue,
Cao Wenwu,
Cross L. Eric
Publication year - 1994
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.1151-2916.1994.tb06979.x
Subject(s) - lead zirconate titanate , materials science , ceramic , ferroelectricity , composite material , polarization (electrochemistry) , electrode , actuator , dopant , titanate , optoelectronics , doping , dielectric , electrical engineering , chemistry , engineering
Electric fatigue is a major obstacle for some potential applications of ferroelectric materials based on reversals of spontaneous polarization, such as memory devices and high strain actuators. Our studies of finegrained hotpressed lead zirconate titanate with lanthanum dopant (PLZT 7/68/32) show that fast fatigue is actually caused by contaminated surfaces instead of intrinsic structure deterioration or the change of domain states. All of the specimens with conventionally cleaned surfaces showed significant fatigue after 10 5 switching cycles, but specimens cleaned with a new cleaning procedure did not fatigue even after more than 10 8 switching cycles. This type of fatigue is found to be due to generated microcracking at the ceramic–electrode interface.