Phosphorus-aluminum silicate glass with low cost and high compressive stress layer

A silicate glass, high-compression technology, applied in glass molding, glass tempering, glass manufacturing equipment, etc., can solve problems such as no compressive stress layer required

Inactive Publication Date: 2019-06-04
KORNERSTONE MATERIALS TECH
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  • Claims
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  • Phosphorus-aluminum silicate glass with low cost and high compressive stress layer

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Embodiment 1-8

[0033] 1. Test sample preparation

[0034] Example 1-8 Sample preparation process: After proportioning the raw materials such as quartz sand, alumina, and sodium carbonate according to their purity and moisture content, weigh and mix uniformly to obtain uniform ingredients; then transfer the ingredients from the plastic bottle to about Place the platinum crucible in a 800ml platinum crucible into a silicon-molybdenum rod high-temperature furnace, gradually raise the temperature to 1650°C, hold the temperature for 4-8 hours, accelerate the discharge of glass bubbles and homogenize the glass to eliminate defects by stirring. Then pour the molten liquid into a heat-resistant stainless steel mold for rapid prototyping, then take out the glass block and move it into a box-type annealing furnace for heat treatment at 630°C for about 2 hours, and then lower it to 570°C at a rate of less than 1°C / min. Naturally cool to room temperature. The glass blocks were cut and ground to prepare...

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Abstract

The invention relates to the technical field of glass materials, and in particular relates to phosphorus-aluminum silicate glass with low cost and a high compressive stress layer, the phosphorus-aluminum silicate glass comprises 65-75% of SiO2, 8-16% of Al2O3, 11-18% of Na2O, 0-5% of K2O, 1-4% of P2O5, 0-3% of B2O3; 0-1% of ZnO and 0-0.4% of SnO2, (CaO + MgO + SrO + BaO) is less than or equal to 0.1%, the depth of the ion exchange layer of the reinforced glass is larger than or equal to 60 microns; and the mean line thermal expansion coefficient of the glass is less than 90 * 10 <-7 >/DEG C. After soaking for 6 hours in an oxalic acid solution at 60 DEG C, the weight loss rate of the unit area is less than or equal to 0.15mg/cm<3>, the glass adopts a high SiO2 component, ZnO, Li2O, SnO2 and other components are reduced, and the advantages of low cost and the high compressive stress layer are realized.

Description

technical field [0001] The invention relates to the technical field of glass materials, in particular to an alkaline earth metal oxide-free phosphoaluminosilicate glass with a low-cost and high compressive stress layer. Background technique [0002] After aluminosilicate glass is chemically strengthened, the surface layer of the glass has high surface compressive stress (Compressive Stress, referred to as CS) and forms a certain depth of ion exchange layer (Depth of Layer, referred to as DOL), which can quickly improve the hardness of the glass surface and impact resistance. Performance, scratch resistance and damage resistance, so it is widely used in the outermost cover protection material of touch display products. [0003] Generally, the depth of scratches on the glass surface is generally 30 μm to 50 μm, so the ion exchange layer on the glass surface is required to have a depth of 60 μm to meet the requirements of most application scenarios for scratch resistance and hi...

Claims

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Application Information

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IPC IPC(8): C03C3/097C03C1/00C03B19/02C03B25/02
CPCC03B19/02C03B25/02C03B27/03C03C1/00C03C3/097
Inventor 梁新辉陈招娣林文城洪立昕
Owner KORNERSTONE MATERIALS TECH
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