Aging Behavior and Electric Field Induced-Domain Stabilization in Cr2O3 Doped Pb(Zr0.525 Ti0.475)O3 System

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J. Korean Ceram. Soc. > Volume 24(5); 1987 > Article

Journal of the Korean Ceramic Society 1987;24(5): 477.

Cr2O3첨가 Pb(Zr0.525 Ti0.475)O3계에서의 시효거동과 전계유도 Domain 안정화

한이섭, 김호기

한국과학기술원 재료공학과

Aging Behavior and Electric Field Induced-Domain Stabilization in Cr2O3 Doped Pb(Zr0.525 Ti0.475)O3 System

ABSTRACT

Cr2O3 doped Pb(Zr0.525 Ti0.475)O3 piezoelectric ceramics were prepared from reagent grade oxide mixture, PbO, ZrO2, TiO2 and Cr2O3. Piezoelectric and aging properties of specimens were measured for various additions of Cr2O3. Generally, it has been known that aging rate decreased with Cr2O3 addition by stabilizing the domain wall. But hysteresis loops showed that the domain destabilization was occurred at high electric field (larger than 10KV/cm). In smaller additions of Cr2O3 (0-0.2mol%), aging rate increased and microcracks were created with increasing poling filed due to increasing internal stress. In larger additions of Cr2O3(0.4∼0.6mol%), aging rate decreased with increasing poling field.