Patent ID: 8720226

Claim:
A method of making a glass article comprising: (I) melting batch materials to produce molten glass; and (II) forming a glass article from the molten glass; wherein: (A) the batch materials comprise a plurality of components that (i) affect the ion-exchange properties of the glass and (ii) become at least part of the glass of the glass article; and (B) the method is characterized by: (a) said ion-exchange affecting components and/or their concentrations in the glass of the glass article are at least partially based on computer-implemented modeling which comprises a combination of: (i) a first computer-implemented model which relates chemical depth of layer after ion-exchange to glass composition; and (ii) a second computer-implemented model which relates maximum surface compressive stress after ion-exchange to glass composition; and (b) said batch materials are selected to provide, in the glass of the formed glass articles, said ion-exchange affecting components and/or their concentrations that, at least in part, are based on said computer-implemented modeling; and wherein: the first computer-implemented model comprises a first set of equations that relates chemical depth of layer to glass composition x, temperature T, and time t, and the second computer-implemented model comprises a second set of equations that relates maximum surface compressive stress to glass composition x, temperature T, and time t, where: (i) x={x 1 , x 2 , . . . x i . . . x N } are concentrations of the glass's ion-exchange affecting components other than silica, (ii) T is the temperature of the ion-exchange process, (iii) t is the duration of the ion-exchange process, and (iv) the x i 's comprise at least one component that is not subject to ion exchange.