Porcelain enamel composition and subtrates coated therewith

Details Porcelain enamel composition and subtrates coated therewith Porcelain enamel composition and subtrates coated therewith

C - Chemistry, Metallurgy

03

C

261/14, 117/162

C03C 3/085 (2006.01) C03C 8/00 (2006.01) C03C 8/02 (2006.01) C03C 10/00 (2006.01) H05K 1/03 (2006.01) H05K 1/05 (2006.01)

Patent

CA 1276947

PORCELAIN ENAMEL COMPOSITION AND SUBSTRATE COATED THEREWITH ABSTRACT OF THE DISCLOSURE A partially devitrified porcelain enamel composition is formed by melting an oxide mixture in which 20-50 wt % BaO, 30-60 wt % SiO2, and 2-20 wt % TiO2 are present to form a homogeneous melt, quenching the melt to form a frit and firing the frit. The oxide mixture may optionally include K2O, Na2O, Li2O, Al2O3, B2O3, As2O3, CaO, CeO2, MgO, F2, N2O5, PbO, P2O5, Sb2O3, SnO2, SrO, ZnO, SrO2, and MoO3. Metal substrates coated with such a partially devitrified porcelain enamel composition are particularly suitable for the production of electronic circuits.

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