Electrochemical device incorporating means for preventing reduct

Details Electrochemical device incorporating means for preventing reduct Electrochemical device incorporating means for preventing reduct

1989-02-21

1991-07-02

Tung, T.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204408, 204412, 204426, 204428, G01N 2741

Patent

active

050283090

ABSTRACT:
An electrochemical device having an oxygen-ion conductive solid electrolyte body, a plurality of electrodes formed on the solid electrolyte body, an electrically insulating ceramic layer formed on the solid electrolyte body, a heater disposed such that the heater is electrically insulated by the ceramic layer from the solid electrolyte body, and a dc power source electrically connected to the heater for energizing the heater. At least one of the electrodes is electrically connected to a low-potential terminal of the dc power source. A voltage source is connected in a line between the above-indicated at least one electrode and the low-potential terminal of the dc power source, so that a potential of each of the at least one electrode with respect to a potential V1 at a point of connection of the above-indicated line to the low-potential terminal of the dc power source is maintained at a positive value which satisfies a formula, V1.ltoreq.V2+V3, where, V2 represents voltage drop between a low-potential terminal of a heat-generating portion of the heater and the point of connection to the low-potential terminal of the dc power source, which occurs due to the heating current applied to the heat-generating portion, and V3 represents decomposition potential of the ceramic layer or the solid electrolyte body, whichever is lower, where the at least one electrode operates as an anode.

REFERENCES:
patent: 4559126 (1985-12-01), Mase et al.
patent: 4634514 (1987-01-01), Nishizawa et al.
patent: 4657659 (1987-04-01), Mase et al.
patent: 4728411 (1988-03-01), Mase et al.
patent: 4798693 (1989-01-01), Mase et al.

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