Chemical Potentials of Oxygen for Mixtures of CaO (s) + Ca_4P_2O_9 (s) + {CaO + P_2O_5 + FexO} Melts and Ca_4P_2O_9 (s) + Ca_3P_2O_8 (s) + {CaO + P_2O_5 + Fe_xO} Melts

摘要

Electrochemical measurements involving stabilized zirconia as solid electrode and Mo + MoO_2 as reference electrode were conducted in order to determine the chemical potentials of oxygen for three-phase assemblages of CaO (s) + Ca_4P_2O_9 (s) + liquid and Ca_4P_2O_9 + Ca_3P_2O_8 + liquid within the system CaO + Fe_xO + P_2O+5. The results for the former are log (P_(O_2)/atm) = 6.22 - 27,900 (77K) while for the latter, log (P_(O_2)/atm) = 6.35 - 27,600 (77K).