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http://dx.doi.org/10.3740/MRSK.2003.13.12.846

Ionic Doping Effect in Bi-layered Perovskite SrBi2Nb2O9 Ferroelectrics  

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)
Publication Information
Korean Journal of Materials Research / v.13, no.12, 2003 , pp. 846-849 More about this Journal
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.
Keywords
Doping; Bi-layered Ferroelectrics; ${SrBi_2}{Nb_2}{O_9}$; Phase Transition;
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