Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Ionic Doping Effect in Bi-layered Perovskite SrBi2Nb2O9 Ferroelectrics

비스무스 층구조형 페로브스카이트 SrBi2Nb2O9 강유전체의 이온 치환 효과

  • Park, S.E. (Department of Ceramic Science and Engineering, Changwon National University) ;
  • Cho, J.A. (Department of Ceramic Science and Engineering, Changwon National University) ;
  • Song, T.K. (Department of Ceramic Science and Engineering, Changwon National University) ;
  • Kim, M.H. (Department of Ceramic Science and Engineering, Changwon National University) ;
  • Kim, S.S. (Department of Physics, Changwon National University) ;
  • Lee, H.S. (Department of Physics, Changwon National University)
  • Published : 2003.12.01
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Abstract

Doping effect of various ions in Bi-layered ferroelectric $SrBi_2$$Nb_2$$O_{9}$ (SBN) ceramics was studied. Undoped SBN ceramic and SBN ceramics doped with $Ba^{2＋}$, $Pb^{2＋}$,$ Ca^{2＋}$ , $Bi^{3＋}$ , $La^{3＋}$ , $Ti^{4＋}$ , $Mo^{6＋}$ , and $W^{6＋}$ ions were made by a solid state reaction. Dielectric constants were measured with temperature. Ferroelectric transition temperature decreased with $Pb^{2＋}$ , $Ba^{2＋}$ , $La^{3＋}$ doping, but the transition temperature increased with $Ca^{2＋}$ , $Bi^{3＋}$ , $Ti^{4＋}$, $Mo^{6＋}$ , or$ W^{6＋}$ ionic doping. These results show that the ion size plays an important role in the ferroelectricity of SBN ceramic.

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References

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