Chemical strengthening method of hot bending glass, hot bending strengthened glass and electronic equipment

A technology for strengthening glass and electronic equipment, which is applied in the field of materials, can solve problems such as low strengthening effect and difficult ion exchange, and achieve the effects of enhancing the strength of hot-bending glass, strong impact resistance, and enhancing glass strength

Pending Publication Date: 2022-05-13
BYD CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the glass is hot-bent, the surface tends to be in the lowest energy state, and alkaline metal ions will gather on the glass surface, resulting in a tighter arrangement of ions on the surface of the hot-bending glass. It will be more difficult, that is, under the same strengthening conditions, the ion exchange depth of hot-bending glass will be smaller than that of cold-worked glass, that is to say, the strengthening effect of hot-bending glass under the same chemical strengthening conditions is lower than that of cold-worked glass.

Method used

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  • Chemical strengthening method of hot bending glass, hot bending strengthened glass and electronic equipment
  • Chemical strengthening method of hot bending glass, hot bending strengthened glass and electronic equipment
  • Chemical strengthening method of hot bending glass, hot bending strengthened glass and electronic equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Put a flat glass preform with a thickness of 0.55mm into a hot bending machine, heat it to 650°C (that is, the temperature for hot bending is 650°C), and keep it warm for 2 minutes. The chemical composition of the flat glass preform is measured in mole percentages, including 35-70% SiO 2 , 15-30% Al 2 o 3 , 1-10% Li 2 O, 5-15% Na 2 O and 3-10% of other ingredients. After cooling to room temperature, the hot bending glass to be strengthened is obtained through CNC processing-edge sweeping-polishing-cleaning and other processes.

[0040] Put the hot bent glass into the preheating furnace for the first preheating, the time of the first preheating is 118min, and the temperature of the first preheating is 300°C.

[0041] After the preheating is completed, the hot bending glass is placed in NaNO with a mass fraction of 38%. 3 and 62% KNO 3 1. In the first molten salt at a temperature of 380° C., the first step of strengthening is carried out, wherein the time of the fi...

Embodiment 2

[0044] Put a flat glass preform with a thickness of 0.55mm into a hot bending machine, heat it to 650°C (that is, the temperature for hot bending is 650°C), and keep it warm for 2 minutes. The chemical composition of the flat glass preform is measured in mole percentages, including 35-70% SiO 2 , 15-30% Al 2 o 3 , 1-10% Li 2 O, 5-15% Na 2 O and 3-10% of other ingredients. After cooling to room temperature, the hot bending glass to be strengthened is obtained through CNC processing-edge sweeping-polishing-cleaning and other processes.

[0045] Put the hot-bending glass into the preheating furnace for the first preheating, the time for the first preheating is 95 minutes, and the temperature for the first preheating is 383°C.

[0046] After the preheating is completed, the hot bending glass is placed in NaNO with a mass fraction of 38%. 3 and 62% KNO 3 1. In the first molten salt at a temperature of 380° C., the first step of strengthening is carried out, wherein the time ...

Embodiment 3

[0049] The difference from Example 1 is that the glass forming temperature is 630° C., and the strengthening time for the first step is 116 minutes. Others are the same as in Example 1, and a strengthened glass is prepared.

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Abstract

The invention provides a chemical strengthening method of hot bending glass, which comprises the following steps: putting the hot bending glass into a first fused salt to carry out first-step strengthening, the first-step strengthening condition satisfying one of the following relational expressions; t = 0.16 T + a,-9 < = a < = 224, 600 < = T < 650, and a relational expression I; t = 0.22 T + b, b is greater than or equal to-49 and less than or equal to 185, and T is greater than or equal to 650 and less than 700. T = 0.12 T + c, 15 < = c < = 255, and 700 < = T < = 750. T1 = 0.02 T + d, 350 < = d < = 442, 600 < = T < = 750. The invention also provides hot-bending tempered glass and electronic equipment. According to the method, the relational expression between the time of the first-step strengthening and the hot bending forming temperature is set, and the relational expression between the temperature of the first-step strengthening and the hot bending forming temperature is set, so that the strengthening effect of the hot bending glass can be enhanced.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to a chemical strengthening method for hot-bending glass, hot-bending strengthened glass and electronic equipment. Background technique [0002] With the rapid development of electronic equipment and the improvement of people's living standards, people pay more and more attention to the appearance and feel of electronic equipment. Hot bending glass is formed by heating and softening flat glass in a mold by its own weight or counterweight. The curved glass made by annealing can have a curved edge, which can be used on electronic equipment, which can not only increase the novelty of the appearance of the electronic equipment, but also improve the user's feeling of use. When the glass is hot-bent, the surface tends to be in the lowest energy state, and alkaline metal ions will gather on the glass surface, resulting in a tighter arrangement of ions on the surface of the hot-bending gl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B23/023C03C21/00C03C3/083C03C3/062
CPCC03B23/023C03C21/002C03C3/083C03C3/062
Inventor 余佳惠王洺浩马兰
Owner BYD CO LTD
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