Conductive ceramic sintered body

Compositions – Electrically conductive or emissive compositions – Carbide containing

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

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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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