Abstract
The principle for selecting the reference electrode of oxygen sensor for steelmaking was explained by the distribution formula of oxygen potential in a ZrO 2-based solid electrolyte, and this formula was evaluated under steady-state condition. The Cr Cr 2O 3 reference electrode is better than the Mo MoO 2 reference electrode to measure the steel melts with oxygen content lower than 300 ppm at 1600 °C. The use of Mo MoO 2 reference electrode can accurately measure the steel melts with oxygen content higher than 300 ppm, but is not suitable for measuring the steel melts with extremely low oxygen content.
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