Design of the Piezoelectric Sounder Using the PMN-PT-PZ

PMN-PT-PZ 계 세라믹스를 이용한 압전 발음체 설계

  • 고영준 (영남대학교 대학원 센서 및 시스템공학과) ;
  • 김현철 (영남대학교 대학원 센서 및 시스템공학과) ;
  • 남효덕 (영남대학교 전자정보공학부) ;
  • 장호경 (경산대학교 자연과학부) ;
  • 우홍 (경산대학교 자연과학부)
  • Published : 2001.01.01

Abstract

In this study, the physical properties of the piezoelectric sounder with metal-piezoelectric ceramics were analyzed. The dielectric and piezoeletric properties of 0.5wt% MnO$_2$ and NiO doped 0.1Pb(Mg$\_$1/3/Nb$\_$2/3/)O$_3$-0.45PbTiO$_3$-0.45PbZrO$_3$ ceramics were investigated aiming at acoustic transducer applications. The acoustic characteristics of a thin circular disc-type with metal-piezoceramics have been investigated. Also, the acoustic characteristics for the geometrical form of case were investigated. The piezoelectric sounder with 200kHz resonant frequency and 20kHz bandwidth was designed by considering the sharp directivity and the sound pressure.

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