Process for the manufacture of a measuring probe for a measuring head to detect the oxygen activity of metal melts and a measuring probe manufactured by such a process

US4906349A · kind A · utility

Assignee

• Zircoa, Inc. · US

Inventors

• Pamela Beatrice · Shaker Heights, US
• Herbert L. Johns · London, US
• Hans Leistner · Ingelheim am Rhein, DE
• James R. Wright · Valrico, US
• Ronne Proch · Chagrin Falls, US

Key dates

• Filing date: Oct 12, 1988
• Grant date: Mar 6, 1990
• Expiry date: Oct 12, 2008

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N27/411
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A measuring probe for a measuring head to detect the oxygen activity of metal melts has a reference substance of known oxygen activity, which upon submersion into the metal melt is separated from the metal melt by means of a refractory solid electrolyte that conducts electrons reliably and conducts primarily oxygen at higher temperatures and which permits the measurement of the electromotive force between the reference substance and a bath contact which makes contact with the metal melt. The surface of the solid electrolyte is subjected to a surface cleaning treatment, primarily by means of etching.