The invention relates to a
ceramic glaze, in particular to a high acid-resistant and alkali-resistant lead-free
frit glaze for
bone china used for producing high-quality lead-free
bone china products. The chemical weight percentage of the high acid and alkali resistant lead-free
frit glaze is as follows: SiO 2 58.0-66.0%, Al 2O 3 10.0-15.0%, TiO 2 0.0-1.0%, CaO 0.5-2.0, MgO 0.0-1.0%, K 2O 2.0-6.0%, Na 2O 2.0-6.0%, Li 2O 2.0-6.0%, B 2O 3 15.0-25.0%. The high acid and alkali resistant lead-free
frit glaze of the present invention does not contain any lead,
cadmium,
zinc,
barium,
bismuth and other heavy
metal element components in its
raw material composition, and a certain amount of
alkali metal oxides, TiO2 and
boric acid are added. The composition is simple, scientific and reasonable, and easy to implement; the blank glaze has good adaptability, especially suitable for the characteristics of large temperature differences in domestic kilns; the finished porcelain glaze surface after firing is fine, smooth, smooth, and good gloss; the glaze surface has strong
corrosion resistance , not easy to lose gloss, no
fouling, easy to clean; good adaptability to decal printing paper, high
mechanical strength, good
thermal shock stability, after testing, the
thermal shock stability reaches 180°C-20°C water heat exchange 5 pieces at a time It is especially suitable for use in tableware dishwashers; the content of lead,
cadmium,
zinc,
barium,
bismuth and other
heavy metals in the enamel is zero, which completely solves the problem of poor acid and alkali resistance and
heavy metals such as lead and
cadmium in high-grade
bone china .