Conductive ceramic sintered body

Details Conductive ceramic sintered body Conductive ceramic sintered body

1988-12-19

1991-11-19

Bell, Mark L.

Compositions

Electrically conductive or emissive compositions

Carbide containing

501 89, 501 92, 501 97, H01B 104, C04B 3556, C04B 3558

Patent

active

050664239

ABSTRACT:
A conductive ceramic sintered body substantially free from large variation of electric resistivity, which consists essentially of: (a) a silicon nitride-base ceramic as a matrix; (b) 10-70 volume % of a first conductive material which consists of one or more conductive compounds selected from carbides, nitrides, oxides and their composite compounds of transition metals in Groups IVa, Va and VIa of the Periodic Table; and (c) 0.1-50 volume % of a second conductive material consisting of SiC; the first conductive material and the second conductive material serving to form paths for electric conduction.

REFERENCES:
patent: 3813252 (1974-05-01), Lipp
patent: 3890250 (1975-06-01), Richerson
patent: 4605633 (1986-08-01), DeAngelis
patent: 4613455 (1986-08-01), Suzuki
patent: 4659508 (1987-04-01), Higuchi et al.
N. Uchida and M. Koizumi, "Fabrication of Si.sub.3 N.sub.4 Ceramics with Metal Nitride Additives by Isostatic Hot-Pressing", J. Am. Ceram. Soc., 68[2] C-38-C-40 (1985).

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