Mechanisms of Hydrothermal Barium Titanate Thin Film Formation
Low temperature synthesis of BaTiO3 thin films was performed under hydrothermal conditions below 80°C. Titanium metal, polycrystalline titanium oxide, and polystyrene (coated with a metallo-organic titanium precursor by a sol-gel process) were used as substrate materials. The reactions between the substrates and aqueous Ba(OH)2 solution took place at different time intervals from 10 minutes to 48 hours. The formation mechanisms of BaTiO3 was investigated by electron microscopy techniques during the reaction sequence. It is proposed that the nucleation and growth of crystalline BaTiO3 occur within an amorphous intermediate phase on Ti-metal and polystyrene substrates. However, thin film of BaTiO3 does not form on the surface of the sintered polycrystalline TiO2 under similar reaction conditions.
F. Dogan and M. Sarikaya, "Mechanisms of Hydrothermal Barium Titanate Thin Film Formation," Proceedings of the Materials Research Society (MRS) Symposium, vol. 403, pp. 95-99, Materials Research Society (MRS), Nov 1996.
The definitive version is available at http://dx.doi.org/10.1557/PROC-403-95
Materials Research Society (MRS) Symposium
Materials Science and Engineering
Keywords and Phrases
Crystallization; Electron microscopy; Film growth; Mathematical models; Nucleation; Reaction kinetics; Surface phenomena; Synthesis (chemical); Thermodynamic stability; Thin films; Hydrothermal formation; Barium titanate
International Standard Serial Number (ISSN)
Article - Conference proceedings
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