초록 ▼

A copper alloy comprising 0.1-7.3% of titanium and optionally comprising one or more of zinc, silicon and silver in amounts of 0.001-10%, 0.001-3% and 0.001-1%, respectively, wherein its surface layer contains an oxide containing titanium. This copper alloy exhibits sterilizing effect based on coppe

A copper alloy comprising 0.1-7.3% of titanium and optionally comprising one or more of zinc, silicon and silver in amounts of 0.001-10%, 0.001-3% and 0.001-1%, respectively, wherein its surface layer contains an oxide containing titanium. This copper alloy exhibits sterilizing effect based on copper and antibacterial effect based on optical catalyst function resulting from the oxide which contains titanium dispersed in the surface layer. The oxide containing titanium can be produced by heating the copper alloy which has the above-mentioned composition and is produced in the usual manner to 200-800.degree. C. to oxidize titanium preferentially. In the case that zinc and silicon are contained, these elements are also preferentially oxidized by the heating, so as to produce oxides. Thus, zinc exhibits antibacterial effect and sterilizing effect. Silicon exhibits hydrophilicity. Silver exhibits sterilizing effect.

대표청구항 ▼

[ What is claimed is:] [1.]1. A copper alloy having optical catalyst function, comprising 0.1-7.3 weight % of titanium and, as its balance, copper and inevitable impurities, wherein said alloy has a surface layer, and its surface layer contains an oxide containing titanium, wherein said surface laye

[ What is claimed is:] [1.]1. A copper alloy having optical catalyst function, comprising 0.1-7.3 weight % of titanium and, as its balance, copper and inevitable impurities, wherein said alloy has a surface layer, and its surface layer contains an oxide containing titanium, wherein said surface layer is produced by subjecting said alloy to oxidation, whereby oxygen is diffused into the alloy from its surface, wherein said alloy has both a sterilizing effect and an antibacterial effect.