| 摘要 |
PURPOSE:To improve anti-sulfidization characteristic of contact material by including ruthenium particles of a specified ratio, as being scattered, in a sintered body of silver and forming a layer of ruthenium oxide on the face of the sintered body. CONSTITUTION:Ruthenium particles of 0.1 to 30wt.% is included, as being scattered, in silver or silver alloy and a layer of ruthenium oxide is formed on the face of the silver or silver alloy. If including quantity of ruthenium is less than 0.1wt.%, anti-sulfidization due to the ruthenium oxide on the face of the material is not improved. And if more than 30wt.%, contact resistance of the ruthenium oxide is extremely increased, when compared to silver. Furthermore, practical processability is degraded. Accordingly, anti-sulfidization characteristic of contact material is improved without degrading excellent characteristics of silver and ruthenium. |
