Electrical and Optical Properties of Grain-Oriented (Pb, Ba, La) $Nb_2O_6$ Piezoelectric Ceramics

입자배향(Pb, Ba, La) $Nb_2O_6$ 압전세라믹스의 제작 및 그 전기적.광학적 특성

  • 남효덕 (영남대학교 공과대학 전자공학과) ;
  • 조상희 (경북대학교 공과대학 재료공학과) ;
  • 영전방유 (일본 방위대학교 전기공학교실)
  • Published : 1988.03.01


Ba or La-Substituted lead niobate $(Pb_{1-x}Ba_x)_{1-y}La_{2y/3}Nb_2O_6$(PBLN), powders having needle shape are prepared by flux method using KCl and the effect of Ba or La substitution on morphology of obtained powders is examined. From these needle shape powders, grain-oriented ceramics are made by doctor-blade method and two-stage hot-pressing technique. The dielectric, piezoelectric and optical properties of the ceramics are also investigaated. Heating condition and the amount of substituted Ba or La have remarkable effects have large anisotropy in both permittivity and coupling factor depending on the pressing direction.



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