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Formation process of BaTiO3 particles by reaction between barium hydroxide aqueous solution and titania obtained by hydrolysis of titanium alkoxide

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Abstract

BaTiO3 particles were prepared by heating a suspension of titania derived from the hydrolysis of titanium isopropoxide in a barium hydroxide [Ba(OH)2] aqueous solution. Well-crystallized cubic phase BaTiO3 fine particles were obtained by heating at a temperature >328 K for 24 h. The morphology and size of the obtained particles were affected by the reaction temperature and the Ba(OH)2/titanium alkoxide molar ratio. The secondary particles with a larger size were obtained at a lower reaction temperature. The nucleation process of BaTiO3 depended on the reaction temperature. The formation mechanism of BaTiO3 and the formation kinetics were investigated by measuring the concentrations of Ba2+ ions in the solution during the heating process. The BaTiO3 particle formation occurred on the surface of the titania particles after strong adsorption of the Ba2+ ions from the solution. The experimental results showed that the heterogeneous nucleation of BaTiO3 occurred on the titania surface.

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Authors and Affiliations

  1. Graduate School of Science and Technology, Chiba University, Inage-ku, Chiba-shi, 263-8522, Japan

    Min Zeng, Naofumi Uekawa & Kazuyuki Kakegawa

  2. Department of Applied Chemistry and Biotechnology, Faculty of Engineering, Chiba University, Inage-ku, Chiba-shi, 263-8522, Japan

    Naofumi Uekawa, Takashi Kojima & Kazuyuki Kakegawa

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  1. Min Zeng
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  2. Naofumi Uekawa
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Correspondence to Naofumi Uekawa.

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Zeng, M., Uekawa, N., Kojima, T. et al. Formation process of BaTiO3 particles by reaction between barium hydroxide aqueous solution and titania obtained by hydrolysis of titanium alkoxide. Journal of Materials Research 22, 2631–2638 (2007). https://doi.org/10.1557/jmr.2007.0337

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  • DOI: https://doi.org/10.1557/jmr.2007.0337

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