Catalytic gas-sensitive elements

Details Catalytic gas-sensitive elements Catalytic gas-sensitive elements

1981-08-28

1984-07-03

Marcus, Michael S.

Coating processes

Electrical product produced

Metal coating

422 97, 422 98, 4271264, G01N 2716

Patent

active

044579543

ABSTRACT:
An element for detecting combustible gases comprises a catalyst material associated with an electrical resistor serving as both a heater and a thermal sensor, the catalyst material being produced by heating a deposit from an aqueous slurry of alumina, of maximum particle size 0.1 micron, containing in solution a compound of a metal of the platinum group. The deposited material may constitute a pellet (6) within which is embedded a coiled part (3) of a wire (1) constituting the resistor. The element then resembles a conventional "pellistor" in form, but has improved resistance to poisoning or inhibition of the catalyst.

REFERENCES:
patent: 3883307 (1975-05-01), Kim
patent: 4072467 (1978-02-01), Jones
patent: 4111658 (1978-09-01), Firth et al.
patent: 4193964 (1980-03-01), John
patent: 4303612 (1982-12-01), Sonley
patent: 4416911 (1983-11-01), Wilkinson-Tough

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