Preparation method of anti-purple-halo transparent ceramic panel for replacing sapphires

Abstract

The invention relates to a preparation method of an anti-purple-halo transparent ceramic panel for replacing sapphires. A transparent ceramic is a cubic crystal system and comprises AlON based ceramics, Y2O3 based ceramics, Spinel based ceramics and YAG based ceramics. The preparation method of the transparent ceramic comprises the following steps: adding a certain amount of sintering additives, binding agents, dispersing agents, liquid media, grinding balls and / or rare earth oxides into ceramic powder, performing ball-milling, uniformly mixing, then performing tape casting molding, or performing slip casting molding, or performing gel casting molding, or performing injection molding, or performing dry-pressing molding to obtain a ceramic biscuit, degreasing a molded biscuit, and then sintering to obtain the ceramic; and performing annealing, polishing and anti-reflection film coating treatment on the obtained ceramic to obtain the transparent ceramic panel of which the transmittance is about 95%. The transparent ceramic panel disclosed by the invention does not need cutting processing, is easily-controllable in shape, can be used for simplifying a processing technique, also is short in ceramic production cycle, and ensures that the productivity can be improved and the cost can be reduced.

Description

technical field

[0001] The invention relates to a preparation method of an anti-purple halo transparent ceramic panel for replacing sapphire, that is, a preparation method for protecting a cover plate of a display device, in particular to a method for replacing sapphire for an anti-purple anti-corrosion panel used in mobile phones, scanners, PADs, and watches. A preparation method of a purple halo transparent ceramic panel. Background technique

[0002] Large-screen smartphones have driven the development of many new technologies, the most obvious of which is the screen material. At present, mainstream mobile phones and PADs on the market generally use Corning's Gorilla Glass cover, and recently sapphire glass screens have also been heated up. The Mohs hardness of the gorilla glass cover is only about 7, while the Mohs hardness of sapphire reaches 9, which is second only to the hardness of diamonds. It has good wear resistance, good heat resistance, light transmission and c...