Glaze compositions
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United States of America Patent
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-
Apr 19, 1994
Grant Date -
N/A
app pub date -
Apr 16, 1992
filing date -
Apr 17, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Glaze composition comprises 45 to 75% of SioO.sub.2, 0.1 to below 5% of Bi.sub.2 O.sub.3, 0.1 to 20% of Al.sub.2 O.sub.3 to 20% of B.sub.2 O.sub.3, at least one of CaO, MgO, SrO, BaO or Zno in an amount of 2 to 22%, at least one of Li.sub.2 O, Na.sub.2 O, K.sub.2 O in an amount of 1 to 10%, at least one of La.sub.2 O.sub.3, MoO.sub.3 or WO.sub.3 in an amount of 0.1 to 10% and certain other optional ingredients, all percentages being percentages by weight based on the total weight of the glaze composition, the glaze composition having a firing temperature of 950.degree. to 1250.degree. C., and having a coefficient of thermal expansion of 50 to 100.times.10.sup.-7 /.degree.C.
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