Aluminosilicate glass, preparation method thereof, electronic display screen protection glass

Abstract

The invention discloses an aluminosilicate glass, an aluminosilicate reinforced glass, a production method of aluminosilicate reinforced glass, and an electronic display screen protection glass. The aluminosilicate glass based on oxides includes, by mass, 63-73% of SiO2, 10-17% of Al2O3, 3-7% of Li2O, 4-10% of Na2O, 0.9-3% of K2O, 3-6% of MgO, 0.1-3% of ZnO and 0.5-5% of ZrO2. Li2O, ZnO and otherlow-melting point raw materials are adopted to reduce the melting temperature of ZrO2-containing glass, and proportions of other oxides are adjusted to make the glass have a high hardness and a good resistance to crack propagation.

Description

technical field [0001] The present invention relates to aluminosilicate glass, and further relates to aluminosilicate glass, a preparation method of aluminosilicate strengthened glass, and a glass plate of the aluminosilicate glass material. Background technique [0002] In the application field of portable electronic equipment, such as mobile phones, tablets, computers, etc., due to the need for easy portability, the requirements for lightweight equipment are getting higher and higher, and the touch screen protective glass needs to be thinner and thinner. In order to ensure that the thin glass has a certain mechanical Strength, it is very necessary to chemically toughen it. [0003] However, glasses with different compositions undergo different ion exchange processes, and the properties of the obtained glasses are also very different. In order to improve the strength of thin glass after a suitable ion exchange process, it is necessary to adjust the ion exchange process for...

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Problems solved by technology

[0004] One way is to substantially increase the Al in the glass composition 2 o 3 content, but too much increase Al 2 o 3 content, although it can increase the network space of the glass and significantly enhance the ion exchange performance of the glass, the melting temperature of the glass will also increase significantly, and the viscosity of the glass will also increase significantly, which will cause glass production problems such as glass clarification and difficulty in homogenization.

Another way is to greatly increase the Na in the glass composition 2 If the O content is increased too much, the Na2O content can significantly increase the compressive stress of the glass, but if the alkali content is too high, it will cause serious volatilization problems, which will greatly shorten the life of the kiln refractory material, and Na 2 Excessive increase of O content will increase the thermal expansion coefficient of the glass, which will make the thermal shock resistance of the glass worse, and increase the difficulty of the annealing of the glass and the 3D hot bending molding of the rear end.

Or another way is to add P to the original glass composition 2 o 5， , but adding P to the glass 2 o 5 , will significantly increase the crystallization tendency of the glass, and at the same time due to the P 2 o 5 The volatilization problem of the kiln will shorten the service life of the refractory material of the kiln sharply, and make the glass composition uneven, thus forming a permanent stress inside the glass and bursting, affecting the yield of the glass; or using a one-step ion exchange process, but using the existing The one-step ion exchange process does not maximize the compressive stress and surface compression depth of the glass, while the two-step ion exchange process can force the existing strengthening layer by heat-treating the glass between two adjacent salt bath processes. Move to the depth of the glass, so as to obtain multiple independent compressive stress layers inside the glass, so that the internal compressive stress layer is improved, thereby improving the overall strength of the glass

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