Oxygen sensing element

Details Oxygen sensing element Oxygen sensing element

1979-04-06

1980-06-24

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

Vacuum arc discharge coating

G01N 2758

Patent

active

042093775

ABSTRACT:
The high temperature durability of an oxygen sensing element, which comprises a solid electrolyte member composed of sintered material, and a means for providing a reference oxygen partial pressure, composed of a sintered product of a finely divided metal or metal-metal oxide mixture powder and being completely embedded within the solid electrolyte member, is improved by incorporating in the finely divided metal or metal-metal oxide mixture powder an antisintering material and a pore-forming material capable of subliming or being decomposed, thereby to generate gas upon sintering. The amounts of the antisintering material and the pore-forming material are from 5 to 70% by weight and from 20 to 80% by weight, respectively, based on the total weight of these additives-incorporated metal or metal-metal oxide mixture. The low temperature operation capability of the oxygen sensing element is improved by further incorporating therein a minor amount of a platinum group metal.

REFERENCES:
patent: 3904486 (1975-09-01), Faurschou et al.
patent: 3915830 (1975-10-01), Isenberg
patent: 4096048 (1978-06-01), Matsumoto et al.
patent: 4141812 (1979-02-01), Kawawa et al.

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