Method of forming glass having a Zn.sub.z SiO.sub.4 enamel layer

Details Method of forming glass having a Zn.sub.z SiO.sub.4 enamel layer Method of forming glass having a Zn.sub.z SiO.sub.4 enamel layer

1993-04-07

1994-02-15

Jones, W. Gary

Glass manufacturing

Processes

Devitrifying glass or vitrifying crystalline glass

65 605, 65 6053, 65102, C03B 1100, C03B 1704

Patent

active

052862704

ABSTRACT:
The present invention provides a method of producing an enamel finish on formed section of glass. The enamel composition partially crystallizes upon heating, thereby helping to prevent the forming and handling equipment from sticking and/or adhering to the composition during the forming operation. The enamel composition includes a crystallizable glass frit portion and a seed powder. The crystallized glass frit portion includes precursors from which Zn.sub.2 SiO.sub.4 can be crystallized upon firing of the enamel composition. The seed powder causes at least a portion of the precursors to crystallize upon firing such that during firing at least a part of the crystallizable glass frit yields crystallized Zn.sub.2 SiO.sub.4 formed by the precursors. Preferably, the precursors comprise ZnO and SiO.sub.2, and the seed powder comprises crystalline Zn.sub.2 SiO.sub.4. The enamel composition also preferably includes bismuth oxide (Bi.sub.2 O.sub.3) in order to help further ensure that no sticking and/or adhering problems develop during the forming operation.

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