Abstract.
Stoichiometric and titanium-excess nanocrystalline barium titanates were synthesized using a hydrothermal process at various hydrothermal temperatures and with further heat treatment at 500 °C and 900 °C. Owing to the different process conditions, the excess titanium exists in different states and configurations within the nanocrystalline BaTiO3 matrix; this was demonstrated by X-ray diffraction, Raman scattering, and photoluminescence. In these nanocrystalline BaTiO3, the 590, 571, 543 and 694 nm light emission bands were observed; mechanisms leading to such emissions were also discussed.
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Received: 23 February 2001 / Accepted: 10 May 2001 / Published online: 27 June 2001
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Yu, J., Chu, J. & Zhang, M. Syntheses of nanocrystalline BaTiO3 and their optical properties . Appl Phys A 74, 645–647 (2002). https://doi.org/10.1007/s003390100919
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DOI: https://doi.org/10.1007/s003390100919