Glass frit composition

Abstract

A glass frit comprising about 60% by weight of glass formers, 30% by weight of monovalent fluxes and 10% by weight of divalent fluxes; the glass formers consisting essentially of SiO.sub.2 and B.sub.2 O.sub.3 ; the monovalent fluxes consisting essentially of Li.sub.2 O, Na.sub.2 O and K.sub.2 O; the divalent fluxes being selected from the group consisting of CaO, SrO, BaO and PbO; and trace elements not exceeding 10% by weight. Preferably the glass frit has the following composition, in terms of oxides: ______________________________________ SiO.sub.2 49% B.sub.2 O.sub.3 12% Li.sub.2 O 3.6% Na.sub.2 O 14.4% K.sub.2 O 11.4% CaO 5% SrO 1.85% BaO 2.75% ______________________________________ The glass frit has a coefficient of thermal expansion of 7.2.times.10.sup.-6 /.degree. F. (13.times.10.sup.-6 /.degree. C.) over the range from room temperature to 600.degree. F. (316.degree. C.). It is useable to make a slip where it can be fired at temperatures around 950.degree. F. (510.degree. C.) and applied to a suitable substrate in accordance with existing practices to provide a high quality coating or a viscous damper. Suitable substrates include many nickel-base alloys and stainless steels.

Dependencies are inferred from the claim text.