Fusion seal, sealing materials and use in crt

Details Fusion seal, sealing materials and use in crt Fusion seal, sealing materials and use in crt

C - Chemistry, Metallurgy

03

C

C03C 8/24 (2006.01)

Patent

CA 2143692

A fusion seal between two surfaces, and a material to produce the seal, consist essentially of 60-90 percent by weight of a SnO-ZnO-P2O5 glass frit and 10-40 percent by weight of a mill addition including 0-30% alumina, 0-40% zircon, the total ofalumina and zircon being 10-40% and 0-15% of a further additive that reduces theeffective CTE of the seal, the mill addition being present in a sufficient amount to provide a sealing material having a set point of at least 300°C. The effect of the mill addition in a fusion seal finds particular application in uniting the faceplate and funnel members to form a cathode ray tube envelope.

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