Abstract
The thermal-shock resistance and the response performance of solid electrolytes for an oxygen probe applied in the steelmaking process were studied. One-end closed tubes of ZrO2-8.1 mol%MgO with various volume fraction of cubic phase were used for oxygen activity measurement in the production line, and the changes of phase composition in ZrO2 during immersion into molten steel were investigated.Good thermal-shock resistance was realized for decrease in cubic phase whereas a good response performance was obtained for increase in cubic phase. For the ZrO2-8.1 mol% MgO, the optimum condition of Vc was about 27%. The relationship between O2− ionic conductivity and the phase composition is also discussed.
Published Version
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