Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1987-02-09
1988-02-02
Kaplan, G. L.
Chemistry: electrical and wave energy
Apparatus
Electrolytic
G01N 2758
Patent
active
047227788
ABSTRACT:
The invention relates to a gas sensor having first and second solid electrolyte cells each of which has a solid electrolyte plate, e.g. a zirconia plate, and a pair of porous electrode layers formed on the opposite surfaces of the plate, spacing means to hold the first and second cells in a narrowly spaced, opposite and parallel arrangement and to define a gas chamber, which admits a gas atmosphere subject to measurement, within the gap between the two cells such that the inner electrode layers of the two cells face each other across the gas chamber and means to appropriately restrict diffusion of the gas atmosphere into the gas chamber. Usually one of the two solid electrolyte cells is used as a concentration cell and the other as an ion pump. To prevent unintentional changes in the distance between the two electrode layers facing each other across the gas chamber during the manufacturing process including sintering treatment, at least one support pillar is disposed in the gas chamber so as to fixedly extend from the inner electrode layer of the first cell to the inner electrode layer of the second cell.
REFERENCES:
patent: 4505806 (1985-03-01), Yamada
Hayakawa Nobuhiro
Yamada Tetsusyo
Yokota Kazunori
Kaplan G. L.
NGK Spark Plug Co. Ltd.
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