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Author: search.filters.author.Kongtaweelert, S.Subject: search.filters.subject.Sintering

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    Item type:Publication,
    Phase and morphology investigation of BaxSr1-xTiO3 (x = 0.6, 0.7 and 0.8) powders
    (2006-06-01)
    Kongtaweelert, S.
    ;
    Sinclair, D. C.
    ;
    Panichphant, S.
    This study aims to understand thoroughly the effects of calcining and sintering conditions on the relative permittivity and sintering behaviors of the solid solution method of preparing BSTs. BST (Ba<inf>x</inf>Sr<inf>1-x</inf>TiO<inf>3</inf>, x = 0.6, 0.7 and 0.8) was synthesized using an established solid-state reaction method [R.K. Roeder, E.B. Slamovich, Stoichiometry control and phase selection in hydrothermally derived Ba<inf>x</inf>Sr<inf>1-x</inf>TiO<inf>3</inf> powders, J. Am. Ceram. Soc. 82 (7) (1999) 1655, R. Ganesh, E. Goo, Microstructure and dielectric characteristics of Pb<inf>x</inf>Ba<inf>0.5-x</inf>Sr<inf>0.5</inf>TiO<inf>3</inf> ceramics, J. Am. Ceram. Soc. 79 (1996) 225, J.W. Liou, B.S. Chiou, Effect of direct-current biasing on the dielectric properties of barium strontium titanate, J. Am. Ceram. Soc. 80 (12) (1997) 3093, T. Noh, S. Kim, C. Lee, Chemical preparation of barium-strontium titanate, Bull. Korean. Chem. Soc. 16 (1995) 1180]. BaTiO<inf>3</inf> and SrTiO<inf>3</inf> powders were used as starting materials. Crystallinity and lattice parameter of the calcined powders was improved by increasing the calcining temperature, as indicated by the increase in intensity of the X-ray diffraction peak. The particle size distribution also increasing at higher calcining temperature. The composition investigated here display dielectric properties characteristic of normal ferroelectrics. © 2005.