Electrically conductive ceramics with oxides of Al, Cr, and Mg

Details Electrically conductive ceramics with oxides of Al, Cr, and Mg Electrically conductive ceramics with oxides of Al, Cr, and Mg

1994-07-29

1997-08-12

McGinty, Douglas J.

Compositions

Electrically conductive or emissive compositions

Metal compound containing

501117, 501119, H01B 108, C04B 35105, C04B 35117

Patent

active

056562039

ABSTRACT:
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 10.sup.12 ohm-cm or less at 20.degree. 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.times.10.sup.7 to 5.times.10.sup.10 ohm-cm and a hardness of at least 5 GPa.

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