Composition for glass, chemically strengthened glass with low brittleness, and preparation method and application of chemically strengthened glass with low brittleness

Abstract

The invention relates to the glass field, and discloses a composition for glass, chemically strengthened glass with low brittleness, a preparation method of the chemically strengthened glass with low brittleness and application of the chemically strengthened glass with low brittleness. The composition is prepared from the following components in percent by weight: 40 weight percent to 60 weight percent of SiO2, 15 weight percent to 35 weight percent of B2O3, 1 weight percent to 7 weight percent of Al2O3, 10 weight percent to 17 weight percent of Na2O, 0 to 4 weight percent of K2O, 8 weight percent to 15 weight percent of MgO, 0 to 6 weight percent of CaO, 0.01 weight percent to 3 weight percent of SrO, 0.01 weight percent to 3 weight percent of BaO and 1 weight percent to 8 weight percent of ZnO. The glass prepared according to the preparation method disclosed by the invention has the advantages of good toughening effect, higher strain point, higher modulus of elasticity, lower melting temperature, higher coefficient of thermal expansion, lower brittleness, excellent strength, excellent toughness, suitability for large-scale industrial production, compatibility for PDP (Plasma Display Panel) substrate production and capability of solving the PDP glass waste recycling problem.

Description

Technical field [0001] The invention relates to the field of glass, and in particular to a composition for glass, low-brittle chemically strengthened glass, and a preparation method and application thereof. Background technique [0002] In the field of flat display, the touch screen product market has developed rapidly in recent years. The current mainstream product is a capacitive touch screen, the main component of which is a glass substrate with a protective surface. With the development of display technology and touch technology, market requirements for glass substrates are increasing. As touch screens are more and more widely used, almost all devices of large, medium and small sizes have touch screens. Therefore, the most important performance of touch screens is to have excellent mechanical properties, scratch resistance and scratch resistance, and this performance is reflected by the strength of glass Yes, so improving the strength of the glass itself is the key. In addi...

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Problems solved by technology

In quartz glass, Si-O has strong bonding force and long-range disorder, and it is difficult to produce plastic shear, so it has high hardness and high brittleness. Part of SiO is replaced by boron or alkali metal 2 , the silicon-oxygen network produces broken bonds, and plastic shear is more likely to occur, so the hardness decreases and the brittleness decreases; 2 o 3 Replace SiO 2 After that, the opening degree of the glass structure was reduced, and it has a rigid structure, which can resist deformation, resulting in a decrease in fracture toughness and an increase in brittleness. At present, the high-alumina and high-alkali silicate cover glass has the characteristics of high strength and high brittleness.

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