Alumina silicate glass and tempered glass

A technology of aluminosilicate glass and strengthened glass, applied in glass tempering, glass manufacturing equipment, manufacturing tools, etc., can solve the problems of easily damaged glass surface, deformation of thin glass, and the failure of exchange layer to achieve flexural strength, etc.

Active Publication Date: 2015-04-29
QINGYUAN CSG NEW ENERGY SAVING MATERIALS CO LTD
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  • Abstract
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Problems solved by technology

[0012] However, the current high-temperature ion exchange method is rarely used. The high-temperature ion exchange method has the problem that the glass surface is easily damaged by molten salt corrosion during strengthening treatment, and it is difficult to obtain a glass substrate suitable for use as a cover glass for portable equipment. Deform the thin glass, the deformation rate exceeds 20%, and the exchange layer is too deep to reach the designed bending strength

Method used

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  • Alumina silicate glass and tempered glass
  • Alumina silicate glass and tempered glass
  • Alumina silicate glass and tempered glass

Examples

Experimental program
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Effect test

preparation example Construction

[0063] The preparation method of the above strengthened glass comprises the following steps:

[0064] Step S110, removing dirt on the surface of the aluminosilicate glass.

[0065] The aluminosilicate glass is the above-mentioned aluminosilicate glass.

[0066] Aluminosilicate glass includes the following components in terms of mole percentage:

[0067] 60%~75% silicon dioxide, 5%~10% aluminum oxide, 5%~8% sodium oxide, 0%~3% potassium oxide, 1%~5% calcium oxide, 1%~ 5% magnesium oxide, 2% to 5% boron trioxide and 0 to 4% zirconium dioxide. The free oxygen coefficient of aluminosilicate glass is 0.9≤Δ≤1.3, where Δ=(Na 2 O+K 2 O+0.7CaO+0.3MgO-Al 2 o 3 ) / B 2 o 3 , where each material represents the mole percentage of the material.

[0068] Specifically, in the present embodiment, the aluminosilicate glass is plate-shaped and has a thickness of 0.5 mm to 2 mm.

[0069] In this embodiment, when removing dirt on the surface of the aluminosilicate glass, a detergent is use...

Embodiment 1～36

[0100] The composition of the aluminosilicate glass in Examples 1-36 is shown in Table 1. The numerical value corresponding to each raw material in Table 1 is the molar percentage of the raw material.

[0101] Table 1

[0102]

[0103] When preparing the aluminosilicate glass of Examples 1-36, weigh the raw materials according to the ratio of each raw material in Table 1, mix them thoroughly, put them into a platinum crucible, and put them into a resistance heating electric furnace at 1550°C for 5 hours melting and clarification. Pour the molten glass into a mold to form it, heat it at 580°C for 30 minutes for annealing, and then cool it to room temperature with the furnace to obtain a glass block. The glass blocks were made into standard specimens to test the density, coefficient of thermal expansion, modulus of elasticity and flexural strength. The relevant data are shown in Table 2.

[0104] Wherein, the density is measured according to GB / T5432-2008 standard.

[010...

Embodiment 11

[0125] The glass in Example 11 is a typical soda-lime-silica glass, since it does not contain Al substantially 2 o 3 , so the material of the crystallization layer obtained after ion exchange is lithium silicate. It can be seen from the table that its strengthening effect is poor.

[0126] In Examples 12-36, aluminosilicate glass with the same composition was used for strengthening under different spraying process parameters. Among them, pure LiCl is used for spraying in Examples 12-31, and the ion exchange time and ion exchange temperature are different. The results show that ion exchange can be carried out at 650 ° C to 825 ° C for 3 minutes to 15 minutes to obtain a crystallized layer , and the more suitable ion exchange temperature is 800°C, and the more suitable ion exchange time is 10min. It can be seen from Examples 26 and 32-36 that when the composition of the strengthening treatment agent is 85%wtLiCl+15%wtNaCl, the bending strength and light transmittance of the st...

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Abstract

The invention discloses alumina silicate glass. The alumina silicate glass comprises the following components in percentage by mole: 60-75% of silicon dioxide, 5-10% of aluminum oxide, 5-8% of sodium oxide, 0-3% of potassium oxide, 1-5% of calcium oxide, 1-5% of magnesium oxide, 2-5% of diboron trioxide and 0-4% of zirconium dioxide; the free oxygen coefficient delta of the alumina silicate glass is larger than or equal to 0.9 and smaller than or equal to 1.3, wherein delta is (Na2O+K2O+0.7CaO+0.3MgO-Al2O3) / B2O3; in the formula, each component represents the percentage by mole of the component. The alumina silicate glass can be used for improving the tempered strength. The invention also provides tempered glass prepared by tempering the alumina silicate glass.

Description

technical field [0001] The present invention relates to an aluminosilicate glass and strengthened glass obtained by strengthening the aluminosilicate glass. Background technique [0002] In recent years, devices such as smartphones and tablet computers have become more and more popular, and they are showing a trend of thinning and lightweighting. One problem with thinning is that the strength of the glass decreases as the thickness decreases. In order to meet the requirements of use, the display glass must still have high strength at a small thickness. To achieve this, the glass needs to be strengthened. [0003] At present, in the composition of the aluminosilicate glass used, in order to ensure the ion exchange capacity and take into account factors such as glass meltability, formability, and devitrification resistance, the content of alkali metal oxides is relatively high. When strengthening aluminosilicate glass, because the glass is thin, the effect of physical tough...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/091C03C3/093C03B27/03
CPCC03C3/091C03C3/093C03C21/002
Inventor 王杏娟戴斌杨婧妮强骥鹏
Owner QINGYUAN CSG NEW ENERGY SAVING MATERIALS CO LTD
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