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Abstract
Fatigue properties and microstructure evolution of ferroelectric Pb1−xSrxTiO3 ceramics have been studied in the present work. Results show that the remanent polarization (Pr) and coercive field (Ec) of specimens may both be changed after a 60Hz cyclic loading over 107switching, indicating that considering only either Pr or Ec in fatigue behavior appears to be inadequate. Therefore a parameter m used for fatigue estimation, taking into account both Prand Ec, was suggested and discussed. Besides, microstructual investigations using transmission electron microscopy imply that internal stress fields, defects and some high energy microstructural arrangements were produced gradually after cyclic domain switching. Therefore domain boundary mobility was retarded and the specimens showed fatigue behavior.