Characterization of Hydroxyl Content of Hydrothermal Barium Titanate Films
Epitaxial barium titanate films were prepared on single crystal strontium titanate substrates by hydrothermal deposition. The substrates were suspended in a solution of barium hydroxide containing titania, at 150 C. The incorporation of hydroxyl groups in the films was studied using XPS and FTIR. A significant concentration of OH was observed at the surface, but none was detected in the barium titanate lattice. The exchange reaction between the OH groups in the film and OD from D2O was studied following immersion of the coated substrates in D2O at 150 C. The films were subjected to several treatment cycles of varying duration. The kinetics of OH replacement increased with increasing cycle time, and also with increasing total reaction time.
S. K. Patil et al., "Characterization of Hydroxyl Content of Hydrothermal Barium Titanate Films," Ceramic Transactions, American Ceramic Society, Jan 2004.
Materials Science and Engineering
Article - Conference proceedings
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