ENAMEL FRIT COMPOSITION FOR A LOW-EXPANSION CRYSTALLIZED GLASS AND ENAMEL-COATED LOW-EXPANSION CRYSTALLIZED GLASS PLATE USING THE SAME

摘要

In order to provide an enamel frit compositionfor a low-expansion crystallized glass, capable ofproducing an enamel coating excellent in abrasionresistance and acid resistance without occurrence ofcracks by using glass powder which does not contain anyharmful component such as PbO, and to provide an enamel-coated low-expansion crystallized glass plate using theenamel frit composition, the enamel frit composition fora low-expansion crystallized glass essentially consists40-98 wt% glass powder, 1-55 wt% coloring pigment, and 0-54 wt% filler. The glass powder consists, by weight, of55-72% SiO2, 4-8% Al2O3, 14-22% B2O3, 2-4% BaO, 5.1-15%Na2O, 0-2% Li2O, 0-2.8% K2O, and 0-2% F2.