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Sapphire reinforcing method

A sapphire and annealing furnace technology, applied in chemical instruments and methods, single crystal growth, crystal growth and other directions, can solve the problems of microscopic damage on the surface of sapphire lens, affecting the bending strength of sapphire, and the surface appearance cannot meet the requirements, and achieves the realization of Mass production, low production cost, and the effect of reducing surface burrs

Active Publication Date: 2015-03-25
LENS TECH CHANGSHA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of sapphire mobile phone lens processing, mechanical processing such as mechanical grinding and CNC shape processing will cause microscopic damage to the surface of sapphire lens and affect the bending strength of sapphire.
In order to improve the strength of the sapphire mobile phone panel, it is usually necessary to strengthen the panel. At present, the existing strengthening method is PECVD (chemical vacuum coating) method, which coats an ion film on the surface of sapphire, but the surface appearance of this method cannot meet the requirements.
And the equipment specially for sapphire coating strengthening is limited to experimental testing, the equipment is expensive and the maintenance cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0025] Take a certain model of mobile phone sapphire panel as an example.

[0026] First, prepare the jig for making the sapphire lens. Processing as figure 1 As shown in the sapphire ingot 1, firstly, the sapphire ingot 1 is processed into a long strip with a square cross-section, and the four edges are chamfered. When the sapphire ingot is processed, the end face crystal orientation is A direction, and the A direction is the sapphire most The non-slip surface can be used continuously in the annealing furnace at a high temperature of 1800℃ without creeping and bending; the surface of the ingot can be polished with a 250# grinding wheel. Before use, the sapphire crystal rod 1 is fired in an annealing furnace under an air atmosphere at a temperature of 1500°C for 3 hours, and can be used after cooling down.

[0027] Then, follow the steps below to anneal and strengthen the sapphire.

[0028] Step 1: Place the cleaned sapphire product for 10 minutes under a deionizing fan to remove s...

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Abstract

The invention discloses a sapphire reinforcing method. The method comprises the following steps: 1) a sapphire lens is placed in an annealing furnace in a hanging manner through a clamp, and then the annealing furnace is filled with inert gas; 2) stepped heating is performed on the sapphire lens in the annealing furnace, a first heating speed ratio is adopted to heat so as to reach a first temperature, and then a second heating speed ratio is adopted to heat so as to reach a second temperature; 3) heat preservation is performed in a second temperature area on the sapphire lens in the annealing furnace; 4) after temperature reduction is performed on the sapphire lens in the annealing furnace, the furnace is opened for natural cooling. For the sapphire lens treated by the method disclosed by the invention, the strength of sapphire in 4PB strength test can be effectively improved by 60%; the strength of the sapphire in ROR strength test can be improved by 68.9%, in addition, the operation is simple and convenient, the course is easy to control, and the method disclosed by the invention is beneficial for realizing large-scale production.

Description

Technical field [0001] The invention belongs to the technical field of sapphire processing, and specifically relates to a physical strengthening method for sapphire products. Background technique [0002] Sapphire lenses have been introduced by many companies into the field of watch lenses and mobile phone screens due to their high hardness, strong scratch resistance and excellent optical performance. Especially sapphire mobile phone panels have gradually moved from concept to production. However, during the processing of the sapphire mobile phone lens, mechanical grinding, CNC contour processing and other mechanical processing will cause microscopic damage to the surface of the sapphire lens and affect the sapphire bending strength. In order to improve the strength of the sapphire mobile phone panel, the panel usually needs to be strengthened. The existing strengthening method is the PECVD (chemical vacuum coating) method, which coats an ion film on the sapphire surface, but the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B33/02C30B29/20
Inventor 周群飞饶桥兵赵军华
Owner LENS TECH CHANGSHA
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