Directly heated ceramic catalyst support

Details Directly heated ceramic catalyst support Directly heated ceramic catalyst support

1988-06-13

1989-09-19

Scott, Jr., Leon

Coherent light generators

Particular active media

Gas

372 34, 372 61, H01S 322

Patent

active

048688410

ABSTRACT:
A directly heated catalyst 10 is comprised of an electrically conductive ceramic substrate 12 having a catalytic coating 14 applied to at least an outer surface thereof. In an illustrative embodiment of the invention the catalytic coating is a noble metal or non-noblemetal coating. In accordance with one embodiment of the invention a high surface area form of platinum (Platinum Black) is deposited upon a ceramic substrate, such as a substrate comprised of SiC or SnO.sub.2. The coating is brought to its activation temperature by resistively heating the substrate with an electrical current. A temperature sensing device (20, 40), such as a thermocouple or a thermostat, may be coupled to the catalyst structure for sensing the temperature of the catalyst to control the heater current supplied to the substrate. The catalyst is shown to be useful for CO.sub.2 gas lasers.

REFERENCES:
patent: 4387462 (1983-06-01), Markus
patent: 4547886 (1985-10-01), Kaminski et al.
patent: 4651324 (1987-03-01), Prein et al.
Sorem et al., "Catalytic Converters for Closed-Cycle Operation of Isotopic CO.sub.2 TEA Lasers", Rev. Sci. Instrum. 52(8), Aug. 81, p. 1183.
Harns, Stark; "Platinum-Catalysed Recombination of CO and O.sub.2 in Sealed CO.sub.2 TEA Laser Gases", J. Phys. E. Sci. Inst., vol. 11, 1978.

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