| 摘要 |
PURPOSE: To heighten heat dissipation property by applying an electric conduction body with copper-containing coating which contains specific weight of nickel particles having particle diameters of specific size and noble metal which has a thickness having specific relationship to the maximum size of the nickel particles. CONSTITUTION: Magnetized electric conductive solid granular substance 5 made of nickel particles having average particle diameters of from 10 to 500 microns is coated by copper coating 6. When the coating 6 has a weight of at least 20 percentage by weight of the granular substance 5, the heat of the granular substance can be easily dissipated. When the coating 6 is further coated by noble metal, for instance, silver coating 7, the oxidation of the copper thereof can be blocked. Thereby, it is possible to obtain the granular substance for an electric conduction body having high heat dissipation property. |
