Heating element composition and method for preparing tube fillin

Details Heating element composition and method for preparing tube fillin Heating element composition and method for preparing tube fillin

1976-06-01

1977-09-13

Padgett, Benjamin R.

Compositions

Electrically conductive or emissive compositions

Metal compound containing

252518, 252 632, 252 635, H01B 108

Patent

active

040481190

ABSTRACT:
An electrical heating element composition comprising crystals of fused magnesium oxide improved by the inclusion of 0.05 to 5% by weight, based on the weight of said fused magnesium oxide, of an additive composition which has excellent lubricating properties in respect of the magnesium oxide crystals and reacts at 800.degree. to 1050.degree. C with active conductivity centers at the surface of one or more adjacent magnesium oxide crystals; an improvement in the preparation of an electrical heating element wherein a granular fused magnesium oxide composition is subjected to mechanical shaping and calcination which comprises employing as the electrical heating element composition a composition comprising crystals of fused magnesium oxide and 0.05 to 5% by weight, based on the weight of said fused magnesium oxide, of an additive composition which has excellent lubricating properties in respect of the magnesium oxide crystals and reacts at 800.degree. to 1050.degree. C with the active conductivity centers at the surface of one or more adjacent magnesium oxide crystals.

REFERENCES:
patent: 3380838 (1968-04-01), Sack
patent: 3583919 (1971-06-01), Balint et al.
patent: 3592771 (1971-07-01), Vedder et al.
patent: 3621204 (1971-11-01), Neidhardt et al.
patent: 3622755 (1971-11-01), Vedder

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