Material having titanium dioxide crystalline orientation film and method for producing the same

• US 6,228,502 B1
• Filed: 03/06/1998
• Issued: 05/08/2001
• Est. Priority Date: 06/24/1997
• Status: Expired due to Fees

• Current Assignee: National University Corporation Nagaoka University of Technology
• Original Assignee: Hidetoshi Saitoh, Kousei Co., Ltd.
• Inventors: Saitoh, Hidetoshi, Tanaka, Norio, Sunayama, Hideki, Ohshio, Shigeo
• Primary Examiner(s): Jones, Deborah
• Assistant Examiner(s): STEIN, STEPHEN J
• Application Number:
  US09/035,906
• Time in Patent Office: 1,159 Days
• Field of Search: 428/221, 428/332, 428/432, 428/469, 428/699, 428/700, 428/701, 428/702, 428/472, 117/924
• US Class Current: 428/472
• CPC Class Codes: C23C 16/405 of refractory metals or yttrium
• CPC Class Codes: C23C 16/45563 Gas nozzles
• CPC Class Codes: C30B 29/16 Oxides
• CPC Class Codes: C30B 7/00 Single-crystal growth from solutions using solvents which are liquid at normal temperature, e.g. aqueous solutions from molten solvents C30B9/00; by normal or gradient freezing C30B11/00; under a protective fluid C30B27/00
• CPC Class Codes: C30B 7/005 Epitaxial layer growth
• CPC Class Codes: Y10T 428/12611 Oxide-containing component
• CPC Class Codes: Y10T 428/26 Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension

Abstract

A material having a titanium dioxide crystalline orientation film oriented in a specific direction on a surface of a substrate is produced by spraying a vaporized titanium alkoxide onto the surface of the substrate heated under atmospheric pressure along with an inert gas as a carrier. The material having the titanium dioxide crystalline orientation film is excellent in properties such as an antimicrobial activity, a stain resistance, an ultra-hydrophilic property and the like, and is widely used as kitchen appliances such as cooking utensils, tableware and a refrigerator, tools for medical care, materials for a toilet or a toilet room, a filter of an air-conditioner, electronic parts, building materials and road-associated materials.

Claims

1. A photocatalytic composite comprising:

a substrate;

an anatase titanium dioxide polycrystalline orientation film formed on a surface of the substrate,

wherein said polycrystalline orientation film is oriented such that a crystal face selected from the group consisting of crystal faces (001), (100), (211), (101) and (110) is at right angles to a surface of a crystal forming the film.

2. The photocatalytic composite defined in claim 1, wherein a thickness of the film is about 0.1 μ

m or more.

3. The photocatalytic composite defined in claim 2, wherein a particle diameter of the crystal forming the film is between about 0.1 and about 10 μ

m, and a particle diameter distribution is substantially within the range 0-200% of an average value.

4. The photocatalytic composite defined in claim 2, wherein the film has a network structure.

5. The photocatalytic composite defined in claim 1, wherein the film is annealed in an oxygen atmosphere.

6. The photocatalytic composite defined in claim 1, wherein the substrate comprises a metal.

7. The photocatalytic composite defined in claim 1, wherein the substrate comprises a glass, a pottery, ceramics or plastics.

8. The photocatalytic composite defined in claim 1, wherein the substrate is a metal having a film of other metal formed thereon.

9. The photocatalytic composite defined in claim 1, wherein a coating selected from the group consisting of silver, copper and oxides of these is further formed on the surface of the titanium dioxide polycrystalline orientation film.