ELECTRICALLY CONDUCTIVE CERAMICS AND THEIR USE IN FIBER CHARGING APPARATUS

摘要

A conductive ceramic composition is disclosed which consists essentially of alumina, chromia, and magnesia, and is suitable for use as target electrodes in electrostatic fiber charging applications. Ceramics are disclosed which have exhibit volume resistivities of 1012 ohm-cm or less at 20 ~C, and have excellent electrical stability and superior mechanical properties; and an electrostatic charging apparatus is disclosed which employs a ceramic electronic conductor having a volume resistivity of from about 1 x 107 to 5 x 1010 ohm-cm and a hardness of at least 5 GPa.