Aluminosilicate strengthened glass and preparation method thereof

A technology of aluminosilicate glass and strengthened glass, which is applied in the field of glass manufacturing, and can solve the problems of traditional cover glass, such as the need to further improve the mechanical properties, loss of display function, glass particles entering, etc., to achieve perfect glass network structure and suppress self-explosion problems , the effect of lowering the melting temperature

Active Publication Date: 2022-03-04
QINGYUAN CSG NEW ENERGY SAVING MATERIALS CO LTD +2
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Problems solved by technology

[0009] For example, the upper cover glass does not perform well in the test of rough ground drop resistance and rough surface roller tumbling test, and the degree of toughness is very high. After breaking in practical applications, a large number of fine glass particles will be produced (the broken degree factor γ is relatively small), In this way, the following problems inevitably arise: (1) Dense cracks are generated after being broken into fine particles. Although the corresponding shape is still maintained due to the OCA glue, a large number of broken cracks have blocked the screen display, and the mobile phone or other smart devices will be damaged. It will completely lose the display function and cannot be used; (2) The fine glass particles may enter the user's eyes, mouth, etc., especially children, and may hurt hands and other exposed human body parts because the particles are too fine
Therefore, the mechanical properties of traditional cover glass need to be further improved
At the same time, although the aforementioned aluminosilicate glass also involves research on the coefficient of thermal expansion, its thermal expansion coefficient at 35°C to 50°C is 73 to 95×10 -7 ℃ -1 , 350℃~550℃ thermal expansion coefficient is 80~100×10 -7 ℃ -1 , still needs to be further improved to better meet the temperature requirements of 3D hot bending of cover glass and 3D glass suitable for more complex structures made of 3D molds

Method used

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  • Aluminosilicate strengthened glass and preparation method thereof
  • Aluminosilicate strengthened glass and preparation method thereof
  • Aluminosilicate strengthened glass and preparation method thereof

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preparation example Construction

[0073] The present invention also provides the preparation method of the aluminosilicate strengthened glass, comprising the following steps:

[0074] Mixing raw materials according to the composition of the aluminosilicate glass, performing melting treatment, then annealing and forming to prepare the aluminosilicate glass;

[0075] Immersion of aluminosilicate glass in NaNO 3 and KNO 3 Ion exchange is carried out in mixed molten salts to prepare the aluminosilicate strengthened glass.

[0076] The specific preparation process of the aluminosilicate glass involved in the present invention can be obtained in the traditional flat glass manufacturing process, and its manufacturing process is not limited to the float forming process, overflow down-draw method, lead-up method, flat drawing method, and calendering method Wait.

[0077] In one example, the melting temperature ranges from 1500°C to 1700°C.

[0078] In one example, the annealing temperature is 550°C-750°C.

[0079]...

Embodiment 19

[0118] Embodiment 19 On the base component of embodiment 5, reduce Y 2 o 3 to 0.1%, the reduced part is added to SiO 2 Above, its glass sample was immersed in a mixed solution of 10wt% sodium nitrate and 90wt% potassium nitrate. After 2 hours at a temperature of 420°C, its CS Na30 208MPa, CS Na50 133MPa, CS K 906MPa, DOL is 124μm, CT is 79.84MPa, DOL K is 5.3 μm, and its surface potassium and sodium ion exchange is inhibited, CS K 、DOL K Slightly reduced, but its fragmentation gamma value has decreased to 16.9mm.

Embodiment 20

[0119] Embodiment 20 On the base component of embodiment 5, K 2 O increased to 2%, reduced SiO 2 Components, the glass sample of which is immersed in a mixed melt of 10wt% sodium nitrate and 90wt% potassium nitrate, at a temperature of 420°C, after 2 hours, is tested by a stress tester, and its CS Na30 176MPa, CS Na50 132MPa, CS K 933MPa, DOL is 122μm, CT is 88.46MPa, DOL K It is 6.8μm, and its fragmentation γ value has decreased to 19.8mm.

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Abstract

The invention relates to an aluminosilicate strengthened glass and a preparation method thereof. The aluminosilicate strengthened glass uses NaNO 3 and KNO 3 One-step strengthening of aluminosilicate glass by mixing molten salt; in terms of weight percentage, the composition of said aluminosilicate glass includes: 48%-61% SiO 2 , 23% to 34% Al 2 o 3 , 4% to 7% Li 2 O, 1.5% ~ 6% Na 2 O, 0.01% to 3% K 2 O, 1%~5% MgO, 0.4%~6% B 2 o 3 , 0.1% to 1% of Y 2 o 3 and B 2 o 3 / Y 2 o 3 =4~5, and 0.4%~3% of ZrO 2 . The aluminosilicate strengthened glass has excellent mechanical properties, can withstand rough ground drop resistance, rough surface roller tumbling test, and has a high degree of fragmentation factor γ.

Description

technical field [0001] The invention relates to the technical field of glass manufacturing, in particular to an aluminosilicate strengthened glass and a preparation method thereof. Background technique [0002] Mobile phones have become a necessity in daily life today, tablet computers are also becoming popular, and various devices with touch screen panels are also widely used in various industries. In recent years, with the development of mobile Internet 5G communication technology and wireless charging technology, more and more mobile phones have begun to use double-sided glass design. At the same time, in order to pursue differentiated and personalized design concepts such as thinness and narrow bezels, more and more mobile phones have adopted 3D curved cover or back panel designs. [0003] The vast number of mobile phone end users are still not satisfied with the simple drop resistance, scratch resistance and falling ball impact resistance. These performance tests are o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C21/00C03C3/097C03C3/093
CPCC03C21/002C03C3/097C03C3/093
Inventor 何进王琰陈志鸿王明忠刘红刚肖子凡周翔磊平文亮
Owner QINGYUAN CSG NEW ENERGY SAVING MATERIALS CO LTD
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