Abstract
The activity of MnO in MnO-SiO2 melts has been measured at 1400, 1500 and 1600 °C by means of the technique in which equilibrium is established between the melt, a gaseous atmosphere of fixed oxygen pressure and a Pt-Mn foil immersed in the melt. The variation of the activity of SiO2 with composition and temperature and the integral free energies, and partial heats and entropies are derived. The activity of MnO and the free energy of formation of liquid Mn2SiO4 are well represented by Whiteway, Smith and Masson’s polymerization model of liquid silicates with Ink 1,1 = −5212/T + 1.011. Correlation of the results of the present study with previous measurements indicates that solubility of SiO2 in MnO-SiO2 melts is a significant function of oxygen pressure.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
