可化学性回火的玻璃片;CHEMICALLY TEMPERABLE GLASS SHEET

摘要

本发明系关于一种具有不含硼及不含锂玻璃组成之玻璃片，其包含以相对于玻璃总重量表示之重量百分比计之以下各者：65SiO278% ;5Na2O20% ;0K2O<5% ;1Al2O3<4% ;0CaO<4.5% ;4MgO12%；以及含量范围为0.002wt%至0.06wt%之总铁(以Fe2O3形式表示)且(CaO/MgO)比小于1。本发明对应于一种易于化学性回火的钠矽型玻璃组合物，其比铝矽酸盐玻璃更适合于大批量制造，且因此以低成本及以接近于或极类似于已用于现有大批量制造之组成的基底玻璃/基质组成可获得。;5Na2O20% ;0K2O<5% ;1Al2O3<4% ;0CaO<4.5% ;4MgO12%; as well as a total iron (expressed in the form of Fe2O3) in a content ranging from 0.002 to 0.06 % by weight and a (CaO/MgO) ratio which is less than 1. The invention corresponds to an easy chemically-temperable soda- silica type glass composition, which is more suited for mass production than aluminosilicate glass, and therefore is available at low cost, and with a base glass/matrix composition that is close to or very similar to compositions already used in existing mass production.