| 摘要 |
A carbon brush used for a miniature motor, which has a permanent magnet field and is caused to rotate through current commutation via a commutator, formed by bonding graphite powder and used for making sliding contact with the commutator for current commutation, in which the carbon brush is a metal-plated graphite brush formed by pressure-forming and sintering the graphite powder after covering particles of the graphite powder with a metallic layer; the graphite powder used for the metal-plated graphite brush being purified to reduce the ash content of the graphite powder to 0.05 wt. %, and the method of making the same.
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