Muanghlua, Rangson

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Muanghlua, Rangson
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Muanghlua, R.
Muanghlua, Rangsan
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rangson.mu@kmitl.ac.th

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    Item type:Publication,
    Influence of fabrication processing on perovskite phase formation of KNN-BZT
    (2008-01-01)
    Sutapun, M.
    ;
    Muanghlua, R.
    ;
    Huang, C. C.
    ;
    Cann, D. P.
    ;
    Vittayakorn, W. C.
    The binary system of (1-x)(K<inf>1/2</inf>Na<inf>1/2</inf>)NbO <inf>3</inf>-xBi(Zni/2Ti<inf>1/2</inf>)O<inf>3</inf>; x = 0.0-0.30 ceramics was fabricated by conventionally mixed oxide and two-stage mixed oxide methods. Phase development of calcined powders and the crystal structure of sintered ceramics were analyzed by X-ray diffraction (XRD). The microstructure analyses were undertaken by scanning electron microscopy (SEM). In the conventional method, the perovskite phases were obtained for compositions containing only 10 mol % KNN. For compositions above this amount, a complex mixture of phases was observed. However, the complete solid solution of perovskite phase, prepared by two-stage mixed oxide, was retained up to 20 mole % BZT content. The experiments in this study suggest that the two-stage mixed oxide method helps to stabilize the perovskite phase better, when compared with the conventional method. © 2008 Trans Tech Publications, Switzerland.