Reference electrode for electrochemical determination of oxygen

Details Reference electrode for electrochemical determination of oxygen Reference electrode for electrochemical determination of oxygen

1995-09-15

1996-12-03

Bell, Bruce F.

Electrolysis: processes, compositions used therein, and methods

Electrolytic analysis or testing

For oxygen or oxygen containing compound

2057855, 205786, 204435, 204422, 204423, 204412, 422 681, 422 8212, G01N 2726

Patent

active

055804390

ABSTRACT:
The method of electrochemical determination of oxygen partial pressure in ionic melts includes providing a metal/metal oxide reference electrode consisting of an electrode body made of a metal selected from the group consisting of Mo, W, Hf, Nb and Ta and alloys thereof and a layer of an oxide of that metal on the electrode body; immersing a pure platinum electrode and the metal/metal oxide reference electrode in a glass melt; measuring a potential across the metal/metal oxide reference electrode and the pure platinum electrode immersed in the glass melt to obtain a measured potential characteristic of the oxygen partial pressure in the glass melt; obtaining a calibration curve relating the potential across said reference electrode and the pure platinum electrode to the oxygen partial pressure in the glass melt as a function of temperature; and obtaining the oxygen partial pressure in the glass melt from the measured potential and the calibration curve. Either the calibration curve is obtained experimentally by immersing a Zirconium dioxide electrode in the glass melt and measuring a potential difference between the metal/metal oxide reference electrode and the Zirconium dioxide electrode at a plurality of temperatures or theoretically from thermodynamic data for the metal/metal oxide reference electrode.

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patent: 4313799 (1982-02-01), Perkins
Fischer, et al, "Metallurgische Elektrochemie", 1975, pp. 374, 375, 318-326, 244-246 no month available.
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Hladik, "Physics of Electrolytes", vol. 2, 1972, pp. 538-622 no month available.
Samsonov, "The Oxide Handbook", Second Edition, 1982, pp. 44-57 no month available.

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