Sapphire reinforcing method

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...

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

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