Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Effect of MnO$_2$ addition on the piezoelectric properties in 0.9Pb($Mg_{1/3}Nb_{2/3}$)$O_3$-0.1Pb$TiO_3$relaxor ferroelectrics

0.9Pb($Mg_{1/3}Nb_{2/3}$)$O_3$-0.1Pb$TiO_3$계 완화형 강유전체에서 MnO$_2$ 첨가에 따른 압전물성의 변화

  • Park, Jae-Hwan (Materials Science and Technoligy Division, Korea Institute of Science and Technology) ;
  • Park, Jae-Gwan (Materials Science and Technoligy Division, Korea Institute of Science and Technology) ;
  • Kim, Byung-Kook (Materials Science and Technoligy Division, Korea Institute of Science and Technology) ;
  • Kim, Yoon-Ho (Materials Science and Technoligy Division, Korea Institute of Science and Technology)
  • 박재환 (한국과학기술연구원 재료연구부) ;
  • 박재관 (한국과학기술연구원 재료연구부) ;
  • 김병국 (한국과학기술연구원 재료연구부) ;
  • 김윤호 (한국과학기술연구원 재료연구부)
  • Published : 2001.06.01
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Abstract

The effects of MnO$_2$ addition on the piezoelectric properties in 0.9Pb($Mg_{1/3}Nb_{2/3}$)$O_3$-0.1Pb$TiO_3$ relaxor ferroelectrics were studied in the ferroelectricity-dominated temperature range from -4$0^{\circ}C$ to 3$0^{\circ}C$. Dielectric, piezoelectric properties and electric-field- induced strain were examined to clarify the effect of MnO$_2$ addition. As the added amount of MnO$_2$ increase. dielectric and piezoelectric properties of Pb(Mg$_{1/3}$ Nb$_{2/3}$O$_3$ became harder. From the experimental results, it was suggested that Mn behaves as a ferroelectric domain pinning element.

0.9Pb($Mg_{1/3}Nb_{2/3}$)$O_3$-0.1Pb$TiO_3$계 완화형 강유전체에서 MnO$_2$ 첨가가 압전물성에 미치는 영향을 강유전성이 우세한 온도영역인 -40~3$0^{\circ}C$의 온도범위에 걸쳐 조사하였다. MnO$_2$ 첨가에 의한 효과를 유전특성, 압전특성, 전계유기 변형특성 등의 영역에서 고찰하였다 MnO$_2$ 첨가량이 증가할수록 유전성 및 압전성은 hard piezoelectric의 경향을 나타내었다. 이러한 실험적 고찰로부터 첨가된 Mn은 강유전 도메인 분역을 고정하는 역할을 하는 것으로 제안되었다.

Keywords

References

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