Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Effects of $La_2O_3$, $MnO_2$ on the Dielectric and Piezoelectric Properties of $0.02Pb(Y_{2/3}W_{1/3}O_3-0.98Pb(Zr_{0.52}Ti_{0.48})O_3$

$La_2O_3$와 $MnO_2$가 $0.02Pb(Y_{2/3}W_{1/3}O_3-0.98Pb(Zr_{0.52}Ti_{0.48})O_3$의 유전 및 압전 특성에 미치는 영향

  • 윤석진 (한국과학기술연구원 세라믹스 연구부) ;
  • 류소연 (한국과학기술연구원 세라믹스 연구부) ;
  • 문종하 (전남대학교 무기재료공학과) ;
  • 김현재 (한국과학기술연구원 세라믹스 연구부) ;
  • 오상록 (한국과학기술연구원 기전 연구부) ;
  • 이종원 (한국과학기술원 기전 연구부) ;
  • 정형진 (한국과학기술원 세라믹스 연구부)
  • Published : 1995.03.01
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Abstract

Effects of $La_2O_3$, $MnO_2$ on the dielectric and piezoelectric properties of $0.02Pb(Y_{2/3}W_{1/3}O_3-0.98Pb(Zr_{0.52}Ti_{0.48})O_3$ system were investigated. The addition of La2O3 to the system enhanced electromechanical coupling factor (kp), piezoelectric constant (d33), but hardly changed mechanical quality factor (Qm). On the other hand, the addition of $MnO_2$ increased Qm significantly, but did not degrade kp and d33 so much. The piezoelectric properties of $0.02Pb(Y_{2/3}W_{1/3}O_3-0.98Pb(Zr_{0.52}Ti_{0.48})O_3$ containing 0.1wt% $La_2O_3$, 0.4wt% $MnO_2$ were very good and kp, d33, Qm were 55%, 350$\times$10-12C/N, 780, respectively. The size of the grains was proportional to the change of c/a (tetragonality) ratio caused by the addition of $La_2O_3$ and $MnO_2$, and dielectric, piezoelectric properties were sensitive to the amountof pyrochrole phase.

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References

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