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Equilibrium between liquid iron containing Nb with Nb_2O5-MnO-SiO_2 slag was investigatedat 1828 K,the solid electrolyte oxygen concentration cell being used to measure the activityof oxygen in the metal bath.The activity of Nb_O_5 and MnO in the slag was evaluated,accompanied with an iso-activity diagram of a_(Nb_2O_5) and a_(MoO) in Nb_2O_5-MnO-SiO_2 slay.
Equilibrium between liquid iron containing Nb with Nb 2 O 5 -MnO-SiO 2 slag was investigated at 1828 K, the solid electrolyte oxygen concentration cell being used to measure the activity of oxygen in the metal bath. Activity of Nb_O_5 and MnO in the slag was evaluated, accompanied with an iso-activity diagram of a_ (Nb_2O_5) and a_ (MoO) in Nb_2O_5-MnO-SiO_2 slay.