Mullite as an electrochemical probe for the determination of low oxygen activity in liquid iron

Hideaki Suito, Ryo Inoue, Akihiro Nagatani

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11 Citations (Scopus)

Abstract

Oxygen activities in liquid iron deoxidized with aluminium were measured at 1873 K, using a mullite electrolyte having a Cr-Cr2O3 reference mixture. These results were compared with those obtained using commerical tube-type ZrO2-8 mol% MgO and plug-type ZrO2-9 mol% MgO probes, along with oxygen activities calculated from analysis. Oxygen activities from EMF measurements using mullite and plug-type probes were found to be in agreement with those calculated from the Al/Al2O3 equilibrium and those estimated from analyzed oxygen contents. Polarization effect due to electrochemical oxygen transport was observed in a commerical tube-type ZrO2-based probe. Supersaturation in liquid iron deoxidized with aluminium was also measured at 1873 K.

Original languageEnglish
Pages (from-to)419-425
Number of pages7
JournalSteel Research
Volume63
Issue number10
DOIs
Publication statusPublished - 1992 Jan 1

ASJC Scopus subject areas

  • Metals and Alloys

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