Environmentally-friendly alkali-free aluminoborosilicate glass for TFT-LCD
A technology of borosilicate glass and alkali aluminum, which is applied in the field of environment-friendly alkali-free aluminoborosilicate glass for TFT-LCD, can solve the problem of unsuitable TFT-LCD substrate glass, increased energy consumption of glass production and preparation, Unfavorable glass density and other issues
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[0051] The invention provides an alkaline earth metal aluminoborosilicate glass with a high strain point, the glass is composed of (wt.%) by weight percentage (wt.%): SiO 2 55-70,B 2 o 3 7-13, Al 2 o 3 14-21, CaO 5-11, SrO 0.5-10, SnO 2 0.1-0.2, Y 2 o 3 0.1-4.0, no alkali metal oxide R 2 O (R = Li, Na, K), and does not contain environmentally harmful oxides such as As 2 o 3 , Sb 2 o 3 , BaO, etc.
[0052] Among them, the preferred CaO+SrO is 5.5-15, preferably SiO 2 +Al 2 o 3 is 75-85, among which, the preferred Al 2 o 3 The content is 14-20, more preferably Al 2 o 3 Content is 16-18, preferably B 2 o 3 The content is 7-13, the preferred CaO content is 5-11, the preferred SrO content is 0-8, and the glass also contains clarifier SnO 2 0.1-0.2, does not contain elements harmful to the environment, such as As 2 o 3 , Sb 2 o 3 , BaO, etc.
[0053] The density of said glass is less than 2.50 g / cm 3 , preferably not more than 2.46g / cm 3 ; The average line...
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