Changes of Two Phase Composition in Phase Separation Process of Na₂O-CaO-Al₂O₃-B₂O₃-SiO₂-TiO₂ System

Abstract:

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.

• Periodical: Advanced Materials Research (Volumes 105-106)
• Pages: 739-742
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.105-106.739
• Online since: April 2010
• Authors: Wen Li Zhang, Shui Jing Gao, Jing Fu Wang, Jian Guo Jin
• Keywords: Boron-Rich Phase, Glass Phase Separation, Silicon Rich Phase

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