Method of making a catalytic combustion type gas detector

Details Method of making a catalytic combustion type gas detector Method of making a catalytic combustion type gas detector

1978-08-23

1980-12-30

Serwin, R. E.

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Means for analyzing gas sample

324 71SN, 338 34, 23232E, 422 98, 422 88, G01N 2716

Patent

active

042423023

ABSTRACT:
A method is described of making a catalytic combustion type gas detector, the sensitivity of which to alcohol vapors and to tobacco fumes is decreased by utilizing a mixture of powders. The mixed powders is composed of at least one metal oxide selected from TiO.sub.2, ZrO.sub.2, Y.sub.2 O.sub.3, HfO.sub.2, CeO.sub.2, La.sub.2 O.sub.3, NiO Cr.sub.2 O.sub.3 and a substance which presents an N-type semiconductor characteristic by gas adsorption. The mixture is coated directly on a wire coil of Pt or the like and a current is applied to the metal wire coil in an oxidizing atmosphere to sinter the coated mixed powder thereon.

REFERENCES:
patent: 4015230 (1977-03-01), Nitta et al.
patent: 4086556 (1978-04-01), Nitta et al.

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