Hydrothermal preparation of BaTiO3 thin films |
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Authors: | Kyung Won Seo Hyun Goo Kong |
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Affiliation: | (1) School of Chemical Engineering & Biotechnology, Ajou Univ., 442-749 Suwon, Korea |
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Abstract: | In preparing BaTiO3 thin films under hydrothermal conditions, the effects of concentrations of nutrient and mineralizer, and reaction time on
crystallinity, grain size, surface roughness, and film thickness were investigated. Experiments were performed in the ranges
of 0.1-1.5M BaCl2 · 2H2O or Ba(OH)2 · 8H2O and 0-1.5 M KOH with varying reaction time from 0.16 to 8 hours at 140 °C. Bimodal dispersion of crystalline grains on the
surface of BaTiO3 thin films was predicted through nucleation and crystal growth reaction. As the concentrations of nutrient and/or mineralizer
increased, grain size of the thin film became smaller, but more uniform and compact. When 0.4 M Ba(OH)2 · 8H2O was used with 1.0 M KOH, a reaction time longer than 4 hours was required in order to fabricate BaTiO3 thin films. |
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Keywords: | Hydrothermal BaTiO3 Thin Film Bimodal Dispersion |
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