Patent ID: 11964909
Assignee: SCHOTT AG
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A sealing glass comprising:
SiO2 having a content of at least 45% by weight;
Al2O3 having a content of less than 2% by weight;
Na2O having a content of not more than 5% by weight;
free of PbO except for unavoidable impurities;
Li2O in a content of greater than 0% by weight;
K2O in a content of at least 5% by weight;
a coefficient of linear thermal expansion (α20-300) of more than 10*10−6/K;
a dielectric constant (εr) in the range from at least 7.10 to not more than 7.80 at a measurement frequency of 1 MHz and a temperature of 25° C.; and
a glass transition temperature (Tg) in a range from 400 to 550° C.