| 摘要 |
PROBLEM TO BE SOLVED: To prepare a liquid raw material for a titania film having high chemical stability and free from by-production of toxic substances in drying or heat- treatment and to synthesize a crystalline titania film having high adhesivity and relatively high density at a low temperature. SOLUTION: A liquid containing titanium oxide is synthesized by reacting hydrogen peroxide solution with titanium hydroxide gel prepared from a titanium solution and a basic solution and heating the produced liquid at >=80 deg.C. A titania film is produced by applying and drying the liquid or heat-treating the applied and dried liquid. A crystalline titania thin film having relatively high density can be synthesized by the drying or the low-temperature heat- treatment without producing harmful substance in the drying and baking procedures. The liquid for the preparation of the titania film is neutral and applicable to various materials and has a stability remarkably high compared with conventional preparation liquid. A titania film having excellent acid resistance, photocatalytic activity, etc., can be produced even at a temperature as low as 300 deg.C. A dense film of >=1μm thick can be produced by a single coating procedure.
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