| 摘要 |
PROBLEM TO BE SOLVED: To obtain a photocatalytic ceramic material from which a ceramic formed body or a thin film can be easily produced while maintaining the ultrafine particulate state of titanium oxide by sintering a light-transmitting inorg. material with a non-swelling mica which carries titanium oxide fine particles and metal ions. SOLUTION: In the production of a photocatalytic ceramic material, for example, to form a thin film, a photocatalyst fine powder is prepared by coupling titanium oxide fine particles and a non-swelling mica carrying metal ions, to which a light-transmitting inorg. powder is added to prepare a sol. The sol is formed into a thin film and calcined at <=650 deg.C to obtain a photocatalytic ceramic material in a thin film state. In order to produce a porous body, a photocatalyst fine powder is prepared by coupling titanium oxide fine particles and a non-swelling mica carrying metal ions, to which a light-transmitting inorg. powder is added. The prepared material is formed and then sintered at 450 to 700 deg.C. Thereby, a porous photocatalytic ceramic body is produced. In this method, a glass powder is preferably used for the light-transmitting inorg. powder. |
