대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)

대한전기학회 (The Korean Institute of Electrical Engineers)
권호 표지

Ca가 치환된 $PbTiO_3$계 세라믹스의 압전 특성에 관한 연구

A Study on the Piezoelectric Characteristics of Ca-Substituded $PbTiO_3$ Ceramics

  • Park, J.H. (Dept. of Electrical Eng., Yonsei Univesrity) ;
  • Yoon, S.J. (Dept. of Electrical Eng., Yonsei Univesrity) ;
  • Lee, D.H. (Dept. of Electrical Eng., Yonsei Univesrity) ;
  • Paik, D.S. (Dept. of Electrical Eng., Yonsei Univesrity) ;
  • Park, C.Y. (Dept. of Electrical Eng., Yonsei Univesrity)
  • 발행 : 1992.07.23
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초록

In this study, we investigated structural, electrical characteristics and studied the conditions which improved hydrostatic constants in hydrophones as we changed x = 0.1, 0.25, 0.35, 0.4 and y = 0.04, 0.08, 0.12, 0.16 in $(Pb_{1-x}Ca_x)[(Mg_{1/3}Nb_{2/3})_yTi_{1-0.01}Mn_{0.01}]O_3$ ceramics in which Ca was substituted with Pb and $Pb(Mg_{1/3}Nb_{2/3})O_3$ was added to decrease sintering temperature in $PbTiO_3$. When Ca was substituted 0.25[mol], the largest electro-mechanical anisotropy ($k_t/k_p$) was found ($k_t{\fallingdotseq}50,k_p{\fallingdotseq}4$), and the less $Pb(Mg_{1/3}Nb_{2/3})O_3$ and the stronger poling field, the larger this anisotropy was. When Ca=0.25[mol], $Pb(Mg_{1/3}Nb_{2/3})O_3=0.08[mol]$ were substituted, ($k_t/k_p$)(=12, 3) was large, permittivity was low and hydrostatic constants were high. Therefore, this composition is promising as wide band ultrasonic devices in water.

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