| 摘要 |
PURPOSE: A glass composition is provided to enhance chemical durability and fusibility and reduce changing range of softening point by including SiO2, Al2O3, CaO, B2O3, MgO, BaO, barite, and Na2O in specific amount. CONSTITUTION: A glass composition comprises 58-75 weight% of siO2, 1-5 weight% of al2O3, 8-10 weight% of CaO, 0.1-1 weight% of B2O3, 0.01-0.3 weight% of MgO, 0.01-0.3 weight% of BaO, 0.5-0.8 weight% of barite, 10-18 weight% of Na2O. The glass composition additionally includes 0.01-0.1 weight% of additive. The additive comprises one which is selected from SO4, cokes, selenium, cobalt and cesium. The glass composition additionally includes 0.1-1 weight% of molding enhancers. The molding enhancer is LiO2, K2O, or ZrO2. The glass composition additionally includes 0.0001-0.1 weight% of tinting agent. The tinting agent is Fe2O3, Cr2O3, or CuO.
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