Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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The Effects of $Y_{2}O_{3}$ and $Ga_{2}O_{3}$ Addtives on the Microstructure and Piezoelectric Properties of PNN-PZ-PT Ceramics

PNN-PZ-PT 세라믹스의 미세구조 및 암전특성에 대한 $Y_{2}O_{3}$와 $Ga_{2}O_{3}$의 첨가효과

  • Kwon, Jeong-Ho (School of Materials Science and Engineering, University of Ulsan) ;
  • Choi, Hae-Yun (School of Materials Science and Engineering, University of Ulsan) ;
  • Jeong, Yeon-Hak (School of Materials Science and Engineering, University of Ulsan) ;
  • Kim, Il-Won (Department of Physics, University of Ulsan) ;
  • Song, Jae-Sung (Electric & Magnetic Devices Group, KERI) ;
  • Jeong, Soon-Jong (Electric & Magnetic Devices Group, KERI) ;
  • Lee, Jae-Shin (School of Materials Science and Engineering, University of Ulsan)
  • 권정호 (울산대학교 첨단소재공학부) ;
  • 최해윤 (울산대학교 첨단소재공학부) ;
  • 정연학 (울산대학교 첨단소재공학부) ;
  • 김일원 (울산대학교 수학 및 물리기술학부) ;
  • 송재성 (한국전기연구원 전자기소자그룹) ;
  • 정순종 (한국전기연구원 전자기소자그룹) ;
  • 이재신 (울산대학교 첨단소재공학부)
  • Published : 2002.11.07
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Abstract

In this study, the microstructure, dielectric and piezoelectric properties of $0.15Pb(Ni_{1/3}Nb_{2/3})O_3-0.85(PbZr_{0.5}Ti_{0.5})O_3$(0.15PNN-0.85PZT) ceramics having compositions near the morphotropic phase boundary(MPB) was investigated with respect to the variation of $Y_2O_3$ and $Ga_2O_3$ addition amount. The dielectric properties increased and piezoelectric properties decreased with increasing the amount of $Ga_2O_3$. The solubility limit of $Y_2O_3$ is 0.5mol% in this system. The electro-mechanical coupling factor$(K_p)$ and dielectric constant(${\varepsilon}_r$) were 58.6% and 1755 when the amount of $Y_2O_3$ are 0.5mol%.

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