Lithium containing aluminosilicate glass with low expansion after chemical toughening

A method for producing a glass, the method comprising the steps of:

• a) providing a composition;
• b) melting the composition;
• c) producing the glass from the melted composition;
• and
• d) chemically toughening the glass, the glass having before chemical toughening a thickness t of less than or equal to 500 μm, the glass comprising the following components in mol-%:
• SiO2 45-75;
• Al2O3 12-25;
• Li2O >1-11;
• P2O5 0-15;
• B2O3 0-8;
• TiO2 0-5;
• and
• Na2O in an amount of at least 3 mol-%;
• wherein an average number of bridging oxygen per polyhedron BO calculated as 2*4−2*(cmol(O)/(cmol(Si)+cmol(Al)+cmol(B)+cmol(P)+cmol(Ti))) is higher than 3.55 and wherein upon chemical toughening a linear dimension variation in the unit of percentage V1 is so low that an overall geometry variation OGV calculated as (DoL/t)/V1 is higher than 0.8, wherein DoL is a total depth of all ion-exchange layers on one side of the glass and wherein DoL is from >3 μm to <0.5*t, when the glass is chemically toughened with NaNO3 only, KNO3 only, or with both KNO3 and NaNO3, wherein a molar ratio of Li2O/(Li2O+Na2O+K2O) is larger than 0.20.