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J. Korean Ceram. Soc. > Volume 35(5); 1998 > Article
Journal of the Korean Ceramic Society 1998;35(5): 512.
세라믹 엑튜에이터 응용을 위한 Sn 치환의 PLZT(7.5/70/30)의 변형특성
고태경, 강현구, 박재환1
인하대학교 무기재료공학과
Strain Properties of Sn-Substituted PLZT(7.5/70/30) for Application of Ceramic Actuator
PLZT(7.5/70/30) was initially a cubic phase having diffuse phase transition at high temperatures. Sn-sub-stitution for PLZT(7.5/70/30) underwent an irreversible phase transition from cubic to rhom-bohedral structure. However PLZTS(7.5/70/30/y=5 & 10) could be reversibly switched from paraelectric to ferroelectric phase under electric field without showing a significant change in crystal structure. With in-creasing the amount of Sn-substitution the P-E behaviors of the PLZTS became more antiferroelectric which was similar to the effect of La-substitution of PLZT. Our study may suggest that Sn-substitution ef-fectively weakens a formation of long-range order between polar Ti-or Zr- containing octahedra which greatly affects strain properties.
Key words: PLZT(x/70/30), Diffuse phase transition, Sn-substitution, Antiferroelectric, Ferroelectric
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