METHOD FOR PRODUCING LAS-BASED CRYSTALLINE GLASS

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PROBLEM TO BE SOLVED : To provide a method for obtaining LAS (Li2O-Al2O3-SiO2)-based crystalline glass excellent in bubble quality by improving the clarifying ability of halogen in glass melting. SOLUTION : The method for producing the LAS-based crystallin glass is provided by which the LAS-based crystalline glass which has composition containing, by mass, 55-75% SiO2, 17-27% Al2O3, 3-6% Li2O, 0-2% MgO, 0-2% ZnO, 2-5.5% TiO2, 0-3% ZrO2, 0.03-1% rare earth oxide and 0.01-0.2% halogen and substantially not containing As2O3 and Sb2O3 is obtained by melting a raw material batch, wherein the raw material batch contains 0.03-1% rare earth oxide and 0.05-1% halogen. COPYRIGHT : (C)2011, JPO&INPIT