Collard & Roe, P.C.
Li2O-Al2O3-SiO2 crystallized glass and crystallizable glass therefor
Li2O&#8212;Al2O3&#8212;SiO2 crystallized glass is provided which has clarity and glass characteristics equivalent to or superior to a conventional crystallized glass, even when the content of As2O3 is decreased. The Li2O&#8212;Al2O3&#8212;SiO2 crystallized glass consists essentially of, by weight, 60 to 75% SiO2, 17 to 27% Al2O3, 3 to 5% Li2O, 0 to 0.9% MgO, 0 to 0.9% ZnO, 0.3 to 5% BaO, 0 to 3% Na2O, 0 to 3% K2O, 0 to 4% TiO2, 1 to 4% ZrO2, 0 to 4% P2O5, 0.05 to 2% Sb2O3, 0 to 0.9% MgO+ZnO, and 0 to 4% Na2O+K2O.
Nippon Electric Glass Co., Ltd.
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Hiroyuki Narutoshi Akihiko
Yamada Shimatani Sakamoto