Porcelain enamel composition and substrates coated therewith

Details Porcelain enamel composition and substrates coated therewith Porcelain enamel composition and substrates coated therewith

1986-10-02

1988-03-22

Kittle, John E.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428432, 428901, 501 14, 501 72, 501 73, B32B 300, B32B 1500, C03C 800, C03C 3078

Patent

active

047327944

ABSTRACT:
A partially devitrified porcelain enamel composition is formed by melting an oxide mixture in which 20-50 wt % BaO, 30-60 wt % SiO.sub.2, and 2-20 wt % TiO.sub.2 are present to form a homogeneous melt, quenching the melt to form a frit and firing the frit. The oxide mixture may optionally include K.sub.2 O, Na.sub.2 O, Li.sub.2 O, Al.sub.2 O.sub.3, B.sub.2 O.sub.3, As.sub.2 O.sub.3, CaO, CeO.sub.2, MgO, F.sub.2, N.sub.2 O.sub.5, PbO, P.sub.2 O.sub.5, Sb.sub.2 O.sub.3, SnO.sub.2, SrO, ZnO, ZrO.sub.2, and MoO.sub.3. Metal substrates coated with such a partially devitrified porcelain enamel composition are particularly suitable for the production of electronic circuits.

REFERENCES:
patent: 3397076 (1968-08-01), Little et al.
patent: 3840394 (1974-10-01), Eppler
patent: 3904423 (1975-09-01), Guthrie
patent: 4256796 (1981-03-01), Hang et al.
patent: 4355114 (1982-10-01), Hang et al.
patent: 4355115 (1982-10-01), Hang et al.

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