Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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The piezoelectric and dielectric properties of $MnO_2$ doped $0.36Pb(Sc_{1/2}Nb_{1/2})O_{3}-0.25Pb(Ni_{1/3}Nb_{2/3})O_{3}-0.39PbTiO_3$ ceramics

$MnO_2$가 첨가된 0.36PSN-0.25PNN-0.39PT세라믹스의 유전 및 압전특성

  • Jang, Jeong-Wan (School of Electrical and multimedia Eng. Seonam Univ.) ;
  • Lee, Jong-Deok (School of Electrical and multimedia Eng. Seonam Univ.) ;
  • Park, Sang-Man (School of Electrical and multimedia Eng. Seonam Univ.) ;
  • Lee, Sung-Gap (School of Electrical and multimedia Eng. Seonam Univ.) ;
  • Park, Gi-Yun (Group dept. of Electrical and Electronics, Pusan College of information Technology)
  • 장정완 (서남대학교 전기전자멀티미디어공학부) ;
  • 이종덕 (서남대학교 전기전자멀티미디어공학부) ;
  • 박상안 (서남대학교 전기전자멀티미디어공학부) ;
  • 이성갑 (서남대학교 전기전자멀티미디어공학부) ;
  • 박기엽 (부산정보대학 전기전자계열)
  • Published : 2000.07.17
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Abstract

High power piezoelectric materials are presently being extensively developed for applications such as ultrasonic motors and piezoelectric transformer In this study, the piezoelectric and dielectric properties of $MnO_2$ doped $0.36Pb(Sc_{1/2}Nb_{1/2})O_{3}-0.25Pb(Ni_{1/3}Nb_{2/3})O_{3}-0.39PbTiO_3$ (hereafter PSNNT), which is the morphotropic phase boundary composition of the PSN-PNN-PT system were investigated. $MnO_2$-addition into the $0.36Pb(Sc_{1/2}Nb_{1/2})O_{3}-0.25Pb(Ni_{1/3}Nb_{2/3})O_{3}-0.39PbTiO_3$ composition increases the piezoelectric coefficient up to $k_{p}{\fallingdotseq}$55.6[%] and $Q_{m}{\fallingdotseq}$252. Moreover, $MnO_2$ addition makes tetragonal phase more stable with respect to rhombohedral phase.

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