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J. Korean Ceram. Soc. > Volume 31(8); 1994 > Article
Journal of the Korean Ceramic Society 1994;31(8): 829.
반복응력에 따른 PZT 세라믹스의 유전 및 잔류 기계적 특성
태원필, 김송희
강원대학교 재료공학과
Dielectric and Remnant Mechanical Properties Due to Cyclic Stress in PZT Ceramics
The aim of this study is to investigate the changes in dielectric properties, Young's modulus and remnant compressive strength with compressive cyclic loading in PZT of tetragonal, MPB and rhombohedral composition. Higher relative dielectric constants appeared in the poled condition than the unpoled condition for all the compositions. After poling treatment remarkably higher relative dielectric constants were observed particularly in MPB, tetragonal compositions. Until five percent of the expected fatigue life was exhausted, the dielectric constant increased with compressive cyclic stress in MPB and rhombohedral while it remained nearly constant in tetragonal. During the subsequent compressive cyclic stress, dielectric constant decreased in all the three compositions. As the compressive cyclic stress is applied the change of Young's modulus was coincided with the change of remnant compressive strength.
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