Thermocouple protective tube

Details Thermocouple protective tube Thermocouple protective tube

1986-05-14

1987-05-05

Thomas, Alexander S.

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

428 35, 428212, 428220, 428325, 136230, 264 60, 4273722, B32B 108, H01L 3502

Patent

active

046632050

ABSTRACT:
A durable protective tube for a thermocouple having an extended serviceable life is obtained by covering a tubular preform of ceramic material with a refractory coating. The refractory coating is an alternate arrangement of one or more fine refractory layers of fine particulate refractory material having a particle size of 150 mesh to 500 mesh and one or more coarse refractory layers of coarse particulate refractory material having a particle size of 0.1 mm to 2.0 mm. The refractory coating is prepared by alternately applying a slurry of fine refractory particulates in a colloidal silica or ethyl silicate hydrolyzate binder and then coarse refractory particulates on the outer surface of the tubular preform followed by optional sintering.

REFERENCES:
patent: 1773826 (1930-08-01), Simms
patent: 2177046 (1939-10-01), Sweo

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