Lead- and cadmium-free finely divided glass frit compositions

Details Lead- and cadmium-free finely divided glass frit compositions Lead- and cadmium-free finely divided glass frit compositions

1996-02-23

1997-10-07

Group, Karl

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 22, 501 26, C03C 315

Patent

active

056747896

ABSTRACT:
A lead- and cadmium-free glass-frit composition based on a borate glass and containing 4 to 22 mole % La.sub.2 O.sub.3 and 0 to 10 mole % SiO.sub.2 as network-forming oxides and B.sub.2 O.sub.3, wherein the molar ratio of B.sub.2 O.sub.3 to La.sub.2 O.sub.3 is at least 3 to 1. The compositions have an alpha in a range between approximately 50.cndot.10.sup.-7 K.sup.-1 and approximately 100.cndot.10.sup.-7 K.sup.-1 and the start of melting Td in a range between 470.degree. and 670.degree. C.

REFERENCES:
patent: 3677778 (1972-07-01), Ali et al.
patent: 3773528 (1973-11-01), Ali et al.

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