Li2O-Al2O3-SiO2 BASED CRYSTALLIZED GLASS AND PRODUCTION METHOD FOR THE SAME
AssigneeNippon Electric Glass Co., Ltd.
InventorsShingo NAKANE, Kosuke KAWAMOTO
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Abstract
An object of the present invention is to provide a Li2O—Al2O3—SiO2 based crystallized glass with excellent bubble quality even without using As2O3 or Sb2O3 as a fining agent and a method for producing the same. The Li2O—Al2O3—SiO2 based crystallized glass of the present invention is a Li2O—Al2O3—SiO2 based crystallized glass which does not substantially comprise As2O3 and Sb2O3 and comprises at least one of Cl, CeO2 and SnO2, and has a S content of not more than 10 ppm in terms of SO3.
Claims8
A Li2O—Al2O3—SiO2 based crystallized glass, which does not substantially comprise As2O3 and Sb2O, comprising:
- a) not more than 100 ppm As2O3 and not more than 100 ppm Sb2O3;
- and
- b) at least one of:
- 50 to 1500 ppm Cl, not more than 200 ppm CeO2, and 0.1 to 0.5% by mass SnO2,
- wherein the crystallized glass has c) a S content of 2 to 10 ppm in terms of SO3 and (d) a β-OH value of 0.2/mm or more.
6-20. (canceled)
Dependencies are inferred from the claim text.