Method of making a reference electrode

Details Method of making a reference electrode Method of making a reference electrode

1977-01-19

1978-02-14

Tupman, W.

Metal working

Method of mechanical manufacture

Assembling or joining

B01J 1700

Patent

active

040730522

ABSTRACT:
A solid state pH measuring electrode having the pH measuring electrode structure formed by successive layers on an insulating substrate with an outer pH sensitive glass layer being deposited on a supporting solid electrolyte layer by RF sputtering. The reference electrode is similarly formed by depositing an outer layer of glass onto a supporting solid electrolyte layer by RF sputtering with the temperature expansion of the glass and supporting solid electrolyte structure being selected to produce a differential expansion causing random cracking of the glass layer during temperature cycling of the reference electrode. A combination structure is provided wherein the pH measuring electrode and the reference electrode are formed on opposite sides of the same electrically insulating substrate with a thermal compensating element being included in the integrated package.

REFERENCES:
patent: 2917683 (1959-12-01), Brennan
patent: 3282817 (1966-11-01), Riseman
patent: 3498901 (1970-03-01), Metz
patent: 3591482 (1971-07-01), Neff
patent: 3718569 (1973-02-01), Petersen

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