FORMATION OF BATIO3 AND PBTIO3 THIN-FILMS UNDER MILD HYDROTHERMAL CONDITIONS

Well-crystallized polycrystalline thin films of cubic barium titanate (BaTiO3) have been synthesized on Ti-covered Si substrates by exposing the substrates to a Ba(OH)(2) aqueous solution at 160 degrees C and a low pressure less than 1 MPa. It was presumed that the film formation of BaTiO3 involved a dissolution-crystallization mechanism, which pro vides an attractive approach to produce other titanate films and powde rs. Also, we have used for the first time this hydrothermal technique to deposit epitaxial (001)-textured PbTiO3 thin films on SrTiO3(100) s ubstrates.