Changes of Two Phase Composition in Phase Separation Process of Na2O-CaO-Al2O3-B2O3-SiO2-TiO2 System
The titaniferous blast furnace slag was selected as a kind of main raw material in the glass preparation. The glass system was separated phase into boron-rich phase and silicon-rich phase in Na2O-CaO-Al2O3-B2O3-SiO2-TiO2 system, and the changes of the two-phase composition after heat treated at different temperatures were studied. Results indicated that the network adjustment oxide existing in boron-rich phase was only CaO when phase separation temperature was below 750°C, and Na2O concentrated in silicon-rich phase. With the phase separation temperature rising, the distribution of Al2O3 and CaO was almost unchanged, whereas Na2O transferred from the silicon-rich phase to boron-rich phase gradually. In the phase separation process, TiO2 concentrated and crystallized on the phase separation interface.
Wei Pan and Jianghong Gong
W. L. Zhang et al., "Changes of Two Phase Composition in Phase Separation Process of Na2O-CaO-Al2O3-B2O3-SiO2-TiO2 System", Advanced Materials Research, Vols. 105-106, pp. 739-742, 2010