STRENGTHENED GLASS AND METHODS FOR MAKING USING DIFFERENTIAL DENSITY

摘要

Chemically strengthened glass and a method for making utilizing differential areal density are provided. The method includes providing a substrate having a glass chemical structure. Host alkali ions are situated in the chemical structure. The substrate has a treatment-rich volume and a treatment-poor volume located as opposed to each other in the substrate. The method also includes providing an exchange medium characterized by having an areal density, associated with an ion exchange rate, of invading alkali ions having an average ionic radius that is larger than an average ionic radius of the host alkali ions. The method also includes providing a modified exchange medium characterized by having a modified areal density, associated with a modified ion exchange rate, of the invading alkali ions. The method also includes applying the exchange mediums and conducting ion exchange to produce the strengthened substrate.

主权项

1. A method for making a strengthened substrate, the method comprising:
providing a substrate characterized by having
a glass chemical structure including host alkali ions having an average ionic radius situated in the glass chemical structure, andwherein the substrate has dimensional volumes including a treatment-rich volume and a treatment-poor volume located as opposed to each other in the substrate; providing an exchange medium characterized by having an areal density of invading alkali ions having an average ionic radius that is larger than the average ionic radius of the host alkali ions
wherein the areal density is associated with an ion exchange rate of the invading alkali ions; providing a modified exchange medium characterized by having a modified areal density of the invading alkali ions
wherein the modified areal density is associated with a modified ion exchange rate of the invading alkali ionswherein the modified ion exchange rate is slower than the ion exchange rate; applying the modified exchange medium to a surface of the treatment-rich volume; applying the exchange medium to a surface of the treatment-poor volume; and conducting ion exchange while applying at least one of the exchange medium and the modified exchange medium to produce the strengthened substrate.