Reinforcing method for ultra-thin lithium alumina silicate glass

A technology of aluminosilicate glass and ultra-thin glass, which is applied in glass tempering, glass production, glass manufacturing equipment, etc., can solve the problem that ultra-thin lithium aluminosilicate glass cannot be used for industrialization enhancement, the flexural strength is not easy to control, and the problems such as low yield, to achieve the effect of good finish, high yield and improved service life

Active Publication Date: 2009-05-13
CHINA BUILDING MATERIALS ACAD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing glass reinforcement technology causes serious deformation of this special glass in application, and it is difficult to control when enhancing its bending strength, and the yield is low, and it cannot be applied to ultra-thin lithium aluminosilicate glass. Therefore, it is necessary to find a method suitable for strengthening ultra-thin lithium aluminosilicate glass

Method used

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  • Reinforcing method for ultra-thin lithium alumina silicate glass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] According to 85wt.% KNO 3 and 15wt.% NaNO 3Proportionally prepare 50 kg of molten salt, and add 0.15wt% of KOH and Al in addition 2 o 3 , melted in a well-type resistance furnace, and clarified for 30h. Put the ultra-thin glass sample (120mm×40mm×0.1mm) into the temperature-resistant tooling, preheat it in the resistance furnace for 15 minutes, and then immerse it in the molten mixed molten salt for strengthening treatment. The strengthening temperature is controlled at 380°C. The time is 7h. After taking it out from the molten salt, clean the sample: first with deionized water, then with alcohol and dry.

[0028] Tests on treated glass:

[0029] 1. Surface observation: the ultra-thin glass has a good surface finish, no deformation, and a high yield.

[0030] 2. Bending strength test: use the three-point bending strength test method (reference standard JC / T676-1997 "Test method for bending strength of glass materials"). The results showed that the bending strengt...

Embodiment 2

[0035] According to 95wt.% KNO 3 and 5wt.% NaNO 3 Proportional preparation of 50 kg of molten salt, plus 0.1wt.% of KOH and A1 2 o 3 , melted in a well-type resistance furnace, and clarified for 40h. Put the ultra-thin glass sample (120mm×50mm×0.1mm) into the temperature-resistant tooling, preheat it in the resistance furnace for 15 minutes, and then immerse it in the molten mixed molten salt for strengthening treatment. The strengthening temperature is controlled at 400°C, and the time for 8h. Finally, the sample was cleaned, dried and tested in the same manner as in Example 1.

[0036] Results: After strengthening, the surface finish of the ultra-thin glass is good, no deformation occurs, and the yield is high; the bending strength of the ultra-thin glass sample before treatment is 68MPa, and the bending strength after treatment reaches 356MPa.

Embodiment 3

[0038] By 75wt% KNO 3 and 25wt% NaNO 3 Proportional preparation of 50 kg of molten salt, plus 0.1wt.% of KOH and Al 2 o 3 , melted in a well-type resistance furnace, and clarified for 30h. Put the ultra-thin glass sample (80mm×40mm×0.09mm) into the temperature-resistant tooling, preheat it in the resistance furnace for 20 minutes, and then immerse it in the molten mixed molten salt for strengthening treatment. The strengthening temperature is controlled at 420°C, and the time for 6h. Finally, the sample was cleaned, dried and tested in the same manner as in Example 1.

[0039] Results: After strengthening, the ultra-thin glass has a good surface finish, no deformation, and a high yield. The bending strength of the ultra-thin glass sample in this example is 64MPa before treatment, and the bending strength reaches 380MPa after treatment.

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Abstract

The invention relates to a method for reinforcing ultra-thin lithium aluminosilicate glass, which belongs to the technical field of glass processing, wherein 75 to 95 weight percent of KNO3 and 5 to 25 weight percent of NaNO3 are used for preparing fused salt; in addition, the fused salt is added with 0.05 to 0.20 weight percent of KOH and 0.05 to 0.20 weight percent of Al2O3, mixed, and fused and clarificated for 30 to 50 hours at a temperature of more than 350 DEG C; an ultra-thin glass sample with a thickness of between 0.09 and 0.12 millimeter is preheated for 15 to 20 minutes in an electric resistance furnace first, and immersed into the mixed fused salt and subjected to reinforcing treatment for 6 to 9 hours at a temperature of between 380 and 480 DEG C; and the sample is cleaned and dried. An ultra-thin lithium aluminosilicate glass sheet reinforced by the method has good surface cleanliness, is not deformed, and has a bending strength which is more than or equal to 320 MPa. The method has the characteristics of simple operation, low cost, high finished product rate, strong repeatability and so on, obviously improves the bending strength, improves the service life and the activation environment of the ultra-thin lithium aluminosilicate glass, and widens the application range.

Description

technical field [0001] The invention belongs to the technical field of glass processing, and in particular provides a strengthening technology of ultra-thin lithium aluminosilicate glass. Specifically, it is the chemical strengthening technology of lithium aluminum silicate glass with a thickness of 0.09-0.12mm. Background technique [0002] Glass has a series of excellent physical and chemical properties, such as high light transmission, high hardness, strong stability, not easy to deform, etc., and is a material with a wide range of uses. At the same time, glass is a typical brittle material with low tensile (bending) strength, which greatly limits its application. There are many factors affecting the strength of glass, such as storage environment, surface machining, sample size and mechanical scratches, etc. Among them, the existence of surface microcracks and their expansion under force have the greatest impact on glass strength. In order to expand the application fiel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B27/03
CPCY02P40/57
Inventor 祖成奎赵慧峰韩滨刘永华陈江
Owner CHINA BUILDING MATERIALS ACAD
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