Patent ID: 7674736

Claim:
A composition consisting of a glass comprising the following components, in weight percent: SiO 2 60.0-65.0% K 2 O 15.0-19.0% Al 2 O 3 6.0-10.5% Li 2 O 1.8-2.2% Me II O 2.5-8.5% further oxides 1.5-7.0% wherein (a) Me″O represents at least one divalent oxide which is selected from the group of the oxides of Ca, Mg, Sr and Zn, wherein ZnO is present in an amount less than 2.0%, and (b) further oxides represents at least one oxide which is selected from the group of the oxides of B, Zr, Ce and Y; and wherein the glass has a linear coefficient of thermal expansion of 8.0 to 9.5×10 −6 K −1 in the temperature range of 100 to 500° C.