溶鋼中の酸素活量測定に及ぼす ZrO_2-8.1mol% MgO 固体電解質の結晶組成の影響(その他の計測・制御関連技術)(<特集>鉄鋼製造のための新しい計測技術)

概要

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Thermal-shock resistance and response performance of solid electrolytes for an oxygen probe applied in steelmaking processes were studied. One-end closed tubes of ZrO_2-8.1mol% MgO with various volume fraction of cubic phase (V_c) were used for measuring oxygen activity in a production line, and changes of phase composition in ZrO_2 during immersion into molten steel were investigated. Good thermal-shock resistance was realized by decrease in the cubic phase whereas good response performance was obtained by increase in the cubic phase. For the ZrO_2-8.1mol% MgO, an optimum fraction of cubic phase was 27%. The relationship between reliability of measured oxygen activity and the phase composition was also discussed.
社団法人日本鉄鋼協会の論文
1984-07-01