Boron-containing aluminosilicate glass capable of realizing rapid ion exchange

Abstract

The invention provides boron-containing aluminosilicate glass capable of realizing rapid ion exchange, and the boron-containing aluminosilicate glass not only has high inherent damage resistance, but also has high ion exchange kinetics and rapid exchange capability. The boron-containing aluminosilicate glass comprises the following components in percentage by mole: 54 to 68 percent of SiO2, 12 to 20 percent of Al2O3, 0 to 12 percent of B2O3, 12 to 20 percent of Na2O, 0 to 5 percent of K2O and 0 to 6 percent of RO, the molar percentage of B2O3 is not 0; the RO is one or more of MgO, ZnO and CaO; M(B2O3)-[M (Na2O) + M (K2O)-M (Al2O3)] is greater than 1mol%; [M (Na2O) + M (K2O) + M (MgO)] / M (Al2O3) is greater than 1 and less than 1.4; and M represents the molar percentage of the corresponding component.

Description

technical field [0001] The invention relates to the technical field of tempered glass preparation, in particular to a boron-containing aluminosilicate glass capable of rapid ion exchange. Background technique [0002] The chemically strengthened glass formed by ion exchange has strong damage resistance after forming a certain depth of compressive stress layer on its surface. It is widely used as the window and protective cover of portable and mobile electronic devices in smartphones, tablets and Electronic equipment such as entertainment and communication such as laptop computers, video players and information terminals. [0003] Due to the rapid growth in the application of chemically strengthened glass, which has higher and higher strength requirements for the protective cover glass, the development of higher strength chemically strengthened glass, especially for deep surface defects on the glass surface due to contact with hard or sharp objects At this time, glass materi...

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Problems solved by technology

In order to enhance its inherent resistance to impact damage, the existing technology often adds a certain amount of boron oxide to the glass, but boron oxide often reduces the exchange capacity of alkali metal ions in the glass and alkali metal ions in the salt bath, prolonging the ion exchange time. Time will greatly reduce the efficiency of ion exchange. At the same time, too long ion exchange time will cause the stress relaxation of the glass and reduce the surface compressive stress of the strengthened glass, resulting in a decrease in its damage resistance, which cannot meet the protection requirements of the mobile electronic product terminal on the cover plate. Requirements for anti-drop and anti-crack performance of glass

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