| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a metal graphite material that is superior in electrical conductivity having a small quantity of copper, a manufacturing method therefor, and a brush for a DC motor of which the contact voltage drop is low, motor efficiency is high, slidability is satisfactory, a friction variation is reduced, and reduced in wear under a high load and in a high temperature. <P>SOLUTION: The metal graphite material has as the main component graphite and copper obtained by firing graphite powder mixed, granulated and molded with fine copper fine particles. Furthermore, the metal graphite material has a conductive passage among the graphite powder by bringing a part of the surface of the graphite powder into contact with the copper fine particles to make them adhere to one another and electrically combining the graphite power by the copper fine particles. A method of manufacturing the metal graphite material is also provided, and further, a brush for DC motor is provided that uses the metal graphite material manufactured by the manufacturing method therefor is also provided. <P>COPYRIGHT: (C)2008,JPO&INPIT |
