Hydrothermal Synthesis of BaTiO3 in the Presence of NO3-Ion

Abstract

Abstract: Tetragonal BaTiO₃ was prepared hydrothermally in alkaline aqueous solution ofBa(NO₃)₂ and Ti(OC₄H₉)₄ at as low as 240℃. The influence of alkalinity, nitrate ion,reactivity of titanium source and degree of fill on the formation, particle sizes and morpholo-gies was investigated by means of XRD, DSCand IR.The optimum KOHconcentration wasabout 1.0 mol/L, in which BaTiO₃ was the stablest phase among the family of BaO-TiO₂.The nitrate ion played a positive role in the formatin and growth of BaTiO₃ fine crystals. TheMgher the reactivity of titanium source and degree of fill is, the easier the formatin of tetragonal BaTiO₃ is.

Key words: Tetragonal BaTiO₃, Hydrothermal synthesis, Nitrate ion, Reactive titanumsource

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WU Ming-Mei, LI Li, XU Ru-Ren. Hydrothermal Synthesis of BaTiO₃ in the Presence of NO₃^-Ion[J]. Chem. J. Chinese Universities, 1996, 17(1): 6.

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Hydrothermal Synthesis of BaTiO₃ in the Presence of NO₃^-Ion

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