The Piezoelectric Characteristics Depending on the GrainSize of the PT-PZ-PNN Ceramics

압전변압기용 PT-PZ-PNN 세라믹스의 그레인 크기에 따른 압전특성

  • 박정호 (연세대학교 전기전자공학과) ;
  • 김철수 (연세대학교 전기전자공학과) ;
  • 김성곤 (연세대학교 전기전자공학과) ;
  • 이상렬 (연세대학교 전기전자공학과)
  • Published : 2001.10.01

Abstract

The piezoelectric properties of the PT-PZ-PNN system ceramics were investigated depending on the variati on of the grain size. The grain size was varied by sintering temperature, and additive. The effect of the grain size on the electrical, dielectric, and piezoelectric properties was studied with respect to the feasibility of the application for the piezoelectric transformer. Grain size increased as the PMW contents increased. The smaller the particle size used, the smaller the grain size obtained. Specimens are densily sintered. Dielectric and piezoelectric properties are not always improved in proportion to the grain sizes. When he particle size are fine and the grain size are increased properly with the optimum additives, the piezoelectric preperties have good values. the specimen sintered at 1200$\^{C}$ with PMW 2 mol% and MnO$\_$2/ 0.5wt% contents exhibited good piezoelectric properties for a piezoelectric transformer.

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