Vitreous enamel flux and enamel coated article

Details Vitreous enamel flux and enamel coated article Vitreous enamel flux and enamel coated article

1978-10-10

1979-06-12

Vertiz, O. R.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

106 49, 106 53, 428427, 428428, B32B 702, B32B 1706, C03C 502

Patent

active

041580818

ABSTRACT:
There is disclosed a glass or glass-ceramic body with a coefficient of thermal expansion below 40.times.10.sup.-7 /.degree. C. and having an adherent, high gloss enamel fired on at least a portion of the external surface of the body, the enamel flux being composed, in percent by weight on a calculated oxide basis, of 25-40% SiO.sub.2, 40-60% PbO, at least 75% PbO+SiO.sub.2, 3-10% ZrO.sub.2, 4-12% B.sub.2 O.sub.3, and 0.2-2.0% Li.sub.2 O, being free of TiO.sub.2, optionally containing up to 2% Na.sub.2 O+K.sub.2 O and up to 4% CdO, having a coefficient of thermal expansion of 48-70.times.10.sup.-7 /.degree. C., a softening point below 660.degree. C. and low lead and cadmium release values under either acid or alkaline conditions.

REFERENCES:
patent: 4038448 (1977-07-01), Boyd et al.

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