High-strength transparent glass ceramic

A technology of glass-ceramics and crystal phase, applied in the field of high-strength transparent glass-ceramics, can solve the problems of low O content, glass transmittance and strength reduction, difficult high surface strength glass-ceramics, etc.

Active Publication Date: 2019-08-20
KORNERSTONE MATERIALS TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

Patent CN104108883A provides a high-strength lithium disilicate glass ceramic and its preparation method, but the composition contains zirconia and magnesium aluminum silicate crystal phase, it is difficult to obtain glass ceramics with high transmittance
Patent CN1052271762A provides a composition for preparing lithium disilicate glass-ceramics, but there is no Na in the composition 2 In the presence of O components, high surface stress cannot be formed by ion strengthening
Patent CN107845078A provides glass-ceramics and substrates containing lithium disilicate, but Al 2 o 3 、Na

Method used

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  • High-strength transparent glass ceramic
  • High-strength transparent glass ceramic
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Examples

Experimental program
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Effect test

Embodiment 1-8

[0036] 1. Test sample preparation

[0037] Example 1-8 Sample preparation: Weigh according to the purity and moisture content of raw materials such as quartz sand, alumina, sodium carbonate, phosphate, lithium carbonate, zirconia, etc., and uniformly mix to obtain uniform ingredients; then mix the ingredients from the plastic Transfer the bottle to about 800ml platinum crucible, put the platinum crucible into the silicon-molybdenum rod high-temperature furnace, gradually raise the temperature to 1500℃~1560℃, keep the temperature for 2~6 hours, accelerate the discharge of glass bubbles and homogenize the glass by stirring eliminate. After melting, pour the molten liquid into a heat-resistant stainless steel mold for molding, then take out the glass block and move it into a box-type annealing furnace for heat treatment at 500°C for 2 hours, and then lower it to 440°C at a rate of less than 1°C / min. Afterwards, it was naturally cooled to room temperature to obtain the base glass...

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Abstract

The invention belongs to the technical field of glass ceramic materials, and concretely relates to a high-strength transparent glass ceramic. The glass ceramic comprises, by mass, 65-73% of SiO2, 3-10% of Al2O3, 1.5-4% of Na2O, 10-14% of Li2O, 1.5-4% of P2O5, 1.5-5% of Zr2O and 0-1% of a clarifier, a ratio of (Al2O3+ZrO2) to P2O5 is equal to or more than 2 and equal to or less than 6; and a ratioof P2O5 to (Na2O + K2O) is more than -0.5 and less than 0.5, and the crystal phase of the high-strength transparent glass ceramic contains Li2Si2O5 or LiAlSi4O10. The glass ceramic of the present invention has a transmittance of at least 88% and the surface Vickers hardness after reinforcement is at least 750 kgf/mm<2>.

Description

technical field [0001] The invention belongs to the technical field of glass-ceramic materials, in particular, relates to a high-strength transparent glass-ceramics, and more specifically, relates to a Li- 2 Si 2 o 5 Crystalline high-strength transparent glass-ceramics. Background technique [0002] After aluminosilicate glass is ion-strengthened, a layer of high surface compressive stress (Compressive Stress, referred to as CS) and a certain depth of ion-strengthened layer (Depth of Layer, referred to as DOL) are formed on the surface of the glass, thereby rapidly improving the surface of the glass. Hardness, impact resistance, scratch resistance and damage resistance, so it is widely used in the cover protection material of touch display products. With the advent of the 5G communication era and the gradual maturity of wireless charging technology, the back cover made of metal materials is bound to be eliminated, and glass and ceramic materials among non-metal materials ...

Claims

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Application Information

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IPC IPC(8): C03C10/12C03C1/00C03B32/02
CPCC03C10/0027C03C1/004C03B32/02
Inventor 梁新辉陈招娣陈亚洲罗云侠林文城洪立昕
Owner KORNERSTONE MATERIALS TECH
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