| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing titanium oxide for forming a coating film of the titanium oxide functioning as a photocatalyst on the surface of a titanium material or a titanium alloy material. SOLUTION: A base material of the titanium material or the titanium alloy material, or the base material obtained by anodizing one of them is washed with an acid to clean the base material, and the temperature of the cleaned base material is raised within the range of about 300-900 deg.C and kept at the objective temperature for a prescribed tine to form the coating film of the titanium oxide having a color and a thickness is regulated according to the heated temperature on the surface of the base material.
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