Fusion seal and sealing mixtures

Details Fusion seal and sealing mixtures Fusion seal and sealing mixtures

1995-08-08

1996-05-14

Group, Karl

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 10, 501 17, 501 18, 501 24, 501 32, 428428, C03C 824

Patent

active

055167330

ABSTRACT:
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--P.sub.2 O.sub.5 glass frit and 10-40 percent by weight of a mill addition including alumina and, optionally, zircon, the alumina content being at least 10% when it constitutes the mill addition and not over 20% in conjunction with zircon, 0-15 % of a further additive that reduces the effective CTE of the seal, the mill addition being present in a sufficient amount to cause a substantial change in viscosity-temperature characteristics of the material after formation of a seal. The effect of the mill addition on viscosity in a fusion seal finds particular application in uniting the faceplate and funnel members to form a cathode ray tube envelope.

REFERENCES:
patent: 4576920 (1986-03-01), MacDonell
patent: 5021366 (1991-06-01), Aitken
patent: 5071795 (1991-12-01), Beall et al.
patent: 5089445 (1992-02-01), Francis
patent: 5122484 (1992-06-01), Beall et al.
patent: 5179046 (1993-01-01), Francis et al.
patent: 5246890 (1993-09-01), Aitken et al.
patent: 5256604 (1993-10-01), Aitken
patent: 5281560 (1994-01-01), Francis et al.
patent: 5470804 (1995-11-01), Morena

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