PREPARATION OF TITANIA THICK-FILMS BY ELECTROPHORETIC SOL-GEL DEPOSITION USING HYDROTHERMALLY TREATED PARTICLES

Thick titania films were prepared by the modified electrophoretic sol- gel deposition method. The titania par tides prepared by the sol-gel m ethod were hydrothermally treated at 250 degrees C under 5 MPa and the n calcined at 600 degrees C in air. The particles crystallized by the hydrothermal treatment showed no aggregation during the calcination an d were easily re-dispersed in a mixture of ethanol and water to form s table titania sol, Thick titania films of ca. 20 mu m in thickness wer e obtained on stainless steel sheets by electrophoretic deposition of the sol.