Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Effects of CuO Addition on the Dielectric Properties of $Pb(Mg_{1/3}Nb_{2/3})O_3-PbTiO_3$ Ceramics

CuO의 첨가가 PMN-PT 세라믹스의 유전특성에 미치는 영향

  • 김효태 (고려대학교 공과대학 재료공학과) ;
  • 변재동 (고려대학교 공과대학 재료공학과) ;
  • 김인태 (한국과학기술연구원 세라믹스 연구부) ;
  • 김윤호 (한국과학기술연구원 세라믹스 연구부)
  • Published : 1995.09.01
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Abstract

95Pb(Mg1/3Nb2/3)O3-5PbTiO3 (hereinafter designated as 95PMN-5PT) system was prepared by the columbite-precursor method with 2 mol% excess PbO to compensate the PbO loss during thermal process. The amount of CuO was 1~10 mol%, and the effects of CuO addition on the dielectric properties of this system have been investigated. From the microstructures, XRD analysis and dielectric measurements, the solubility limit of CuO in 95PMN-5PT was found to be around 3 mol%. Lattice parameter and Curie temperature were found to be decreased as the amount of CuO increased up to the solubility limit. This result confirmed that the Cu2+-ions substituted the Pb2+-ions. It was revealed that the addition of CuO on 95PMN-5PT promoted the sinterability and properties. The room temperature dielectric constant, the loss factor and the specific resistivity of the specimens processed with optimum conditions were 23000, 1%, and 8$\times$1011Ω.cm, respectively.

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References

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