Unlock instant, AI-driven research and patent intelligence for your innovation.

Fluorine-containing alkali aluminosilicate glass as well as strengthening method and application thereof

A technology of silicate glass and fluorine-containing alkali aluminum, which is applied in the field of optical glass manufacturing, can solve problems such as screen damage of electronic display products, poor stability of perfluorinated glass, and affect the display effect of display products, etc., to improve chemical stability , Improve the effect of ion exchange layer depth, good hardness and mechanical strength

Pending Publication Date: 2020-06-30
CAIHONG GRP SHAOYANG SPECIAL GLASS CO LTD
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

People have higher and higher requirements for the sense of use of electronic touch screens. However, during the use of touch screens, fingers, electronic pens, etc. often leave traces on the screen, or encounter some harsh use environments, such as sharp objects. Scratches, keys or even artificial falls will cause the screens of electronic display products to be damaged or scratched on the surface, which will affect the display effect of the display products and even endanger their service life
[0003] Ion-exchangeable alkali-aluminosilicate chemically strengthened glasses are widely used as cover glasses for displays in many modern electronic devices. Large, poor light transmittance problem
It is well known that fluoride glasses have an extremely low refractive index (n D <1.51), good light transmittance, etc., but perfluorinated glass has the disadvantage of poor stability, so it is not suitable for the preparation of cover glass

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Fluorine-containing alkali aluminosilicate glass as well as strengthening method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] The difference from Comparative Example 2 is only that the glass composition is different, and the glass composition is SiO 2 68%, Al 2 o 3 8%, Na 2 O13%, Li 2 O 3%, P 2 o 5 4%, ZrO 2 3%, AlF3 1% (by mass percentage). Other preparation processes and testing processes are the same as those of the comparative example.

[0062] The CS of the prepared alkali-aluminosilicate glass is 670MPa, the depth of the ion exchange layer is 60μm, the four-point bending strength is 500MPa, the Vickers hardness is 530MPa, and the refractive index is 1.50. Compared with Example 1, the properties of the fluorine-containing alkali-aluminosilicate glass are better than those of Comparative Example 2, indicating that the present invention has achieved good technical effects and progress.

Embodiment 2

[0064] The difference from Comparative Example 2 is only that the glass composition is different, and the glass composition is SiO 2 65%, Al 2 o 3 10%, Na 2 O13%, Li 2 O 3%, P 2 o 5 4%, ZrO 2 3%, AlF 3 2% (by mass percentage). Other preparation processes and testing processes are the same as those of the comparative example.

[0065] The CS of the prepared alkali-aluminosilicate glass is 690MPa, the depth of the ion exchange layer is 100μm, the four-point bending strength is 532MPa, the Vickers hardness is 545MPa, and the refractive index is 1.49. Compared with Example 1, the properties of the fluorine-containing alkali-aluminosilicate glass are better than those of Comparative Example 2, indicating that the present invention has achieved good technical effects and progress.

Embodiment 3

[0067] The difference from Comparative Example 2 is only that the glass composition is different, and the glass composition is SiO 2 52%, Al 2 o 3 23%, Na 2 O11%, Li 2 O 5%, P 2 o 5 3%, ZrO 2 4%, AlF 3 2% (by mass percentage). Other preparation process and testing process are the same as Comparative Example 2.

[0068] The CS of the prepared alkali-aluminosilicate glass is 710MPa, the depth of the ion exchange layer is 115μm, the four-point bending strength is 670MPa, the Vickers hardness is 589MPa, and the refractive index is 1.49. Compared with Example 1, the properties of the fluorine-containing alkali-aluminosilicate glass are better than those of Comparative Example 2, indicating that the present invention has achieved good technical effects and progress.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Bending strengthaaaaaaaaaa
Four point bending strengthaaaaaaaaaa
Depthaaaaaaaaaa
Login to View More

Abstract

The invention relates to fluorine-containing alkali aluminosilicate glass as well as a strengthening method and application thereof. The glass comprises the following components: 52%-68% of SiO2, 8%-23% of Al2O3, 11%-13% of Na2O, 3%-5% of Li2O, 3%-4% of P2O5, 3%-4% of ZrO2 and 1%-2% of a fluoride. The preparation method comprises the following steps: preparing raw materials according to the components, melting, clarifying, molding into glass, and chemically strengthening in a salt bath of potassium nitrate and sodium nitrate at 350-450 DEG C, wherein in first iron exchange, the mass ratio of potassium nitrate to sodium nitrate is (5-36%): (95-64%), and the time period is controlled to be 1-4 hours, in secondiron exchange, the mass ratio of potassium nitrate to sodium nitrate is (96-100%):(0-4%), and the time period is controlled to be 1h or shorter. The glass disclosed by the invention is high in light transmittance and low in refractive index, and can be applied to display devices and mobile equipment.

Description

technical field [0001] The invention relates to the technical field of optical glass manufacturing, in particular to a fluorine-containing alkali aluminosilicate glass and its strengthening method and application. Background technique [0002] With the development of modern technology and people's living standards, touch screens have been widely used in mobile electronic devices, for example, touch screens are widely used in smart phones, e-readers, notebook computers and tablet computers. People have higher and higher requirements for the sense of use of electronic touch screens. However, during the use of touch screens, fingers, electronic pens, etc. often leave traces on the screen, or encounter some harsh use environments, such as sharp objects. Scratching, keys or even falling will cause the screen of electronic display products to be damaged or scratched on the surface, which will affect the display effect of the display products and even endanger their service life. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C03C3/112C03C21/00
CPCC03C3/112C03C21/002
Inventor 李靖波彭引平郭怡刘仲军
Owner CAIHONG GRP SHAOYANG SPECIAL GLASS CO LTD