Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Effects of MnO2on the Piezoelectric Properties of PMN-PZT-based Ceramics

PMN-PZT계 세라믹스의 압전특성에 미치는 MnO2의 영향

  • 김재창 (충주대학교 신소재공학과/나노기술연구소) ;
  • 황동연 (충주대학교 신소재공학과/나노기술연구소) ;
  • 이미영 (충주대학교 신소재공학과/나노기술연구소) ;
  • 유신욱 (충주대학교 신소재공학과/나노기술연구소) ;
  • 김영민 (고려전자(주) 소재개발과) ;
  • 어순철 (충주대학교 신소재공학과/나노기술연구소) ;
  • 김일호 (충주대학교 신소재공학과/나노기술연구소)
  • Published : 2004.05.01
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Abstract

Perovskite PMN-PZT-based ceramics were prepared and the$ MnO_2$ doping effects on their piezoelectric properties were investigated. Grain size decreased with increasing the $MnO_2$ content, and the pyrochlore phase was not identified in the sintered PMN-PZT ceramics with 0.01～1.0wt% $MnO_2$. Piezoelectric voltage and charge constants were reduced and mechanical quality factor increased with increasing the $MnO_2$ content. However, electromechanical coupling coefficient slightly decreased with increasing the MnO$_2$ content without regard to the grain size.

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References

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