Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Effect of DyFeO3 Addition on Crystal Structure and Ferrcelectricity of the BiFeO3-PbTiO3 System

  • Kim, Seong-Seog (Department of Digital Display Engineering, Hoseo University) ;
  • Kwon, Jong-Uk (Department of Digital Display Engineering, Hoseo University) ;
  • Cheon, Chae Il (Department of Materials Science add Engineering, Hoseo University)
  • Published : 2005.05.01
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Abstract

The crystal structure and ferroelectricity of the $(1-x)BiFeO_3\;(BF)-xPbTiO_3$ (PT) ceramic system with the addition of $DyFeO_3$ (DF) have been investigated for attaining a high temperature piezoelectric material. This study is focused on the relation between crystal structure and ferroelectric property with the addition of DF over the phase boundary in the (1-x)BF-xPT system. Hysteresis curves of polarization-electric field at room temperature have been measured. The X-ray and neutron diffraction data were analyzed by the rietveld refinement method. The addition of 0.1 mole DF into BF-PT system greatly increases the ferroelectric remanant polarization Pr values, e.g. 17 ${\mu}C/cm^2$ in 0.6BF-yDF-(0.4-y)PT and 31${\mu}C/cm^2$ in 0.5BF-yDF-(0.5.y)PT, respectively. The improved Pr value has been discussed in relation with crystal structure and electrical property.

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References

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