Cermet materials

Details Cermet materials Cermet materials

1980-11-10

1982-10-19

Schofer, Joseph L.

Compositions

Electrically conductive or emissive compositions

Metal compound containing

252512, 252513, 252515, 252521, 501118, 501152, H01B 106

Patent

active

043549640

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 percent by weight of magnesium oxide.

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