Gas detecting element

Details Gas detecting element Gas detecting element

1979-04-25

1980-12-30

Marcus, Michael S.

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Means for analyzing gas sample

324715N, 338 34, 340634, 23232E, G01N 2712

Patent

active

042423031

ABSTRACT:
A gas detecting element having a high gas selectivity which comprises an N-type metal oxide semiconductor, 0.005 to 8% by weight, based on the metal oxide, of at least one noble metal catalyst selected from the group consisting of platinum (Pt), palladium (Pd) and rhodium (Rh) and phosphorus 1.5 to 30 times as much as that of the noble metal or 0.05 to 30 times as much as that of palladium where palladium alone is used as the noble metal catalyst.

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patent: 3999947 (1976-12-01), Mihara et al.
patent: 4015230 (1977-03-01), Nitta et al.
patent: 4099922 (1978-07-01), Yasada et al.
patent: 4128503 (1978-12-01), Yamauchi et al.
patent: 4138365 (1979-02-01), Ogawa
patent: 4145314 (1979-03-01), Fung et al.
Seiyama et al., "Study on a Det. for Gaseous Components Using Semi-conductive Thin Films", Analy. Chem. 38 7(1966), pp. 1069-1073.
Shaver, P. J., Activated Tungsten Oxide Gas Detectors, Applied Physics Letters 11, Oct. (1967), pp. 255-257.

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