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Metal material having photocatalytic activity and method of manufacturing the same
| Details |
Inventors: Ogawa, Takatoshi; Saito, Toshio; Ohno, Sadatoshi; Kushibe, Atsumichi; Kamikubo, Fumio; Yasunaga, Tatsuya; Kato, Takashi; Ito, Yoshimasa; Fujishima, Akira; Hashimoto, Kazuhito;
Assignee: Takenaka Corporation (Osaka, JP); Kobe Steel Ltd. (Kobe, JP)
Primary Examiner: Speer; Timothy
Assistant Examiner: Young; Bryant
Attorney, Agent or Firm: Bednarek; Michael D. Shawpittman
A metal material having a photocatalytic activity which comprises an anodized layer and a thin layer containing titanium oxide powder which are heat treated are sequentially laminated on the surface of a substrate comprising metal material including titanium. By anodically oxidizing the metal material including titanium, an anodized layer is formed on the surface thereof. A thin layer containing titanium oxide powder is further coated on this surface, and heat treatment is carried out before and/or after forming this thin layer containing titanium oxide powder. |
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DETAILED DESCRIPTION The present invention has been made in consideration of the above-described problems, and, it is an object of the present invention to provide a metal material which is excellent in photocatalytic activity such as deodorizing and sterilizing functions and the like, which has a high strength and durability that can be used for a construction material and the like, and which can manifest a hue and luster to meet various purposes with excellent designing characteristics.
It is a second object of the present invention to provide a simple method for manufacturing a metal material having excellent durability, deodorizing and sterilizing effects and designing properties.
A metal material having a photocatalytic activity of the present invention is provided by sequentially laminating an anodized layer and a thin layer containing titanium oxide powder on the surface of a substrate composed of a metal material containing titanium.
The anodized layer of the metal material having a photocatalytic activity of the present invention is preferably heat processed.
The thickness of the anodized layer of the metal material having a photocatalytic activity of the present invention is preferably 200 to 5000 .
ANG.
and the thickness of the thin layer containing the titanium oxide powder is preferably 200 .
ANG.
to 2 .
mu.
m.
The metal material having a photocatalytic activity of the present invention has the substrate of the metal material containing titanium preferably including at least one element selected from the group consisting of elements in Group 5 to Group 11 and Group 14 in the Periodic Table in an amount of 0.
005 to 2.
0% by weight based on the total weight of the substrate.
A metal material having a photocatalytic activity of the present invention preferably comprises at least one of Ni, Ru and Cr by 0.
005 to 2.
0% by weight based on the total weight of the substrate.
A metal material having a photocatalytic activity of the present invention wherein the potential at which an anode current becomes 5
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