Cermet materials

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H - Electricity

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B

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H01B 1/00 (2006.01) C04B 35/111 (2006.01) C04B 35/71 (2006.01) C22C 29/12 (2006.01) H01B 1/16 (2006.01) H01J 61/36 (2006.01)

Patent

CA 1139930

ABSTRACT An electrically conducting cermet comprises a sintered compact of refractory oxide granules such as alumina granules having diameters of from 50 to 800 microns and a conductive network extending through the cermet and provided by a layer of one or more of titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, tungsten, iron, cobalt or nickel surrounding the individual oxide granules and constituting a volume fraction of 0.04 to 0.2 of the total cermet, wherein particles of one or more of said metals are dispersed within the oxide granules in a volume fraction of 0.01 to 0.15 of the granules, which granules also contain 0.01 to 0.25 per cent by weight of magnesium oxide.

363816

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