Glass-ceramic and its tempering method and application

A kind of glass-ceramic, glass technology, applied in glass tempering, glass manufacturing equipment, electrical equipment shell/cabinet/drawer and other directions, can solve the problem of small degree of ion exchange, temperature drop, not suitable for glass-ceramic and so on

Active Publication Date: 2022-07-29
WEIDALI IND CHIBI CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the existing glass tempering technology is only applicable to ordinary glass, not to glass-ceramic
This is mainly due to: (1) The structure of the glass-ceramic contains some crystals, the existence of the crystals will prevent the ions in the tempered salt from penetrating into the glass matrix, and hinder the ion exchange treatment. Improve the impact strength of glass
(2) Quenching in physical tempering, the temperature drops suddenly, which is not conducive to the orderly growth of crystals

Method used

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  • Glass-ceramic and its tempering method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0097] This embodiment provides a method for tempering glass-ceramic and a glass-ceramic prepared by the tempering method.

[0098] (1) The composition of the glass-ceramic precursor in this embodiment is as follows:

[0099] MgO 6%; ZnO 7%; Al 2 O 3 20%; SiO 2 50%; Na 2 O 4%; CaO 1%; SnO 2 1%; TiO 2 2%; ZrO 4%; P 2 O 5 2%; Sb 2 O 3 1%; B 2 O 3 2%.

[0100] The glass raw materials are: magnesium carbonate, zinc oxide, aluminum oxide, silicon dioxide, sodium carbonate, calcium carbonate, tin oxide, titanium dioxide, zirconium oxide, ammonium dihydrogen phosphate, sodium antimonate and boric acid.

[0101] After converting the ingredients, mix the glass raw materials and additives evenly, and put them into a glass melting furnace for melting at a temperature of 1550°C for 3 hours. After the melting is completed, it is poured into a mold preheated to 500° C. to form a large-volume glass-ceramic precursor.

[0102] (2) The glass-ceramic precursor is cut and pol...

Embodiment 2

[0109] This embodiment provides a method for tempering glass-ceramic and a glass-ceramic prepared by the tempering method.

[0110] (1) The composition of the glass-ceramic precursor in this embodiment is as follows:

[0111] MgO 6%; ZnO 7%; Al 2 O 3 20%; SiO 2 50%; Na 2 O 4%; CaO 1%; SnO 2 1%; TiO 2 2%; ZrO 4%; P 2 O 5 2%; Sb 2 O 3 1%; B 2 O 3 2%.

[0112] The glass raw materials are: magnesium carbonate, zinc oxide, aluminum oxide, silicon dioxide, sodium carbonate, calcium carbonate, tin oxide, titanium dioxide, zirconium oxide, ammonium dihydrogen phosphate, sodium antimonate and boric acid.

[0113] After converting the ingredients, mix the glass raw materials and additives evenly, and put them into a glass melting furnace for melting at a temperature of 1550°C for 3 hours. After the melting is completed, it is poured into a mold preheated to 500° C. to form a large-volume glass-ceramic precursor.

[0114] (2) The glass-ceramic precursor is cut and pol...

Embodiment 3

[0120] This embodiment provides a method for tempering glass-ceramic and a glass-ceramic prepared by the tempering method.

[0121] (1) The composition of the glass-ceramic precursor in this embodiment is as follows:

[0122] MgO 6%; ZnO 7%; Al 2 O 3 20%; SiO 2 50%; Na 2 O 4%; CaO 1%; SnO 2 1%; TiO 2 2%; ZrO 4%; P 2 O 5 2%; Sb 2 O 3 1%; B 2 O 3 2%.

[0123] The glass raw materials are: magnesium carbonate, zinc oxide, aluminum oxide, silicon dioxide, sodium carbonate, calcium carbonate, tin oxide, titanium dioxide, zirconium oxide, ammonium dihydrogen phosphate, sodium antimonate and boric acid.

[0124] After converting the ingredients, mix the glass raw materials and additives evenly, and put them into a glass melting furnace for melting at a temperature of 1550°C for 3 hours. After the melting is completed, it is poured into a mold preheated to 500° C. to form a large-volume glass-ceramic precursor.

[0125] (2) The glass-ceramic precursor is cut and pol...

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Abstract

The present invention relates to a glass-ceramic and its tempering method and application. The tempering method includes the following steps: respectively melting glass raw materials and metal salts to prepare glass-ceramic precursors and tempering molten salts; immersing the glass-ceramic precursors in the tempering molten salts at a temperature of 600° C. to 950° C. Performing tempering treatment to prepare a glass intermediate; cooling the glass intermediate; the composition of the glass-ceramic precursor includes sodium oxide and / or potassium oxide; the metal salt includes lithium salt. The composition of the surface layer of the glass-ceramic precursor is changed by ion exchange, resulting in a difference in thermal expansion coefficient; and through crystallization heat treatment, the surface layer crystal phase is inconsistent with the inner layer crystal phase or the proportion of the surface layer crystal phase is inconsistent with the inner layer crystal phase. In the glass intermediate, in the process of cooling and shrinking, a stress layer is formed between the two layers, which improves the impact resistance of the glass-ceramic. It can be applied to glass panels of display panels or protective casings of electronic products.

Description

technical field [0001] The invention relates to the technical field of glass, in particular to a glass-ceramic and a tempering method and application thereof. Background technique [0002] Glass-ceramic is a kind of glass mixed material discovered by chance. Its structure and properties have some special changes compared with ordinary glass materials. The main manifestation is that the structure of ordinary glass is disordered, while the structure of glass-ceramic is partially ordered. . That is, glass-ceramic is a composite material composed of crystals and amorphous. [0003] Compared with ordinary glass, glass-ceramic has the following advantages: high mechanical strength, excellent insulation performance, low dielectric loss, stable dielectric constant, thermal expansion coefficient can be adjusted in a wide range, good chemical corrosion resistance, wear resistance Good, good thermal stability and high use temperature. Glass-ceramic can be widely used in thicker stru...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B27/03C03C10/00H05K5/00C03B32/02C03C21/00
CPCH05K5/00C03B27/03C03C10/00C03C1/00C03B32/02C03C21/002
Inventor 陈亚兵李倩倩赵丹许仁王伟
Owner WEIDALI IND CHIBI CO LTD
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