Flux 첨가에 의한 Anorthite 합성에 관한 연구

The Anorthite is useful compound for some ceramic industries but it is difficult to produce Anorthite because of its high melting point (1553℃) and narrow firing range. On this study, glass frit was added to Anorthite batch composition to widen firing range and lower melting point. After mixing a glass frit (Na₂O-CaO-6SiO₂) with Anorthite, it was melted and quenched. Ratio of Anorthite vs. glass frit was 9:1, 8.5:1.5, 8:2, 7.5:2.5, 7:3. In those batch composition added amount of No₂O were between 1.3wt. % and 3.9 wt. %. To find the thermal change of the quenched, D. T. A. was surveyed. The quenched were fired at various vitrification temperature and detected by X-Ray diffraction analysis. With addition of glass frit, firing range and vitrification temperature of Anorthite was 100~150℃ and 1050~1150℃ respectively. Optimum amount of glass frit was 20wt. % for the upper mentioned.