| 摘要 |
PROBLEM TO BE SOLVED: To provide glass for a bulb for a halogen lamp which has a high color temperature of at least 3,400 K in particular. SOLUTION: The alkaline-earth aluminosilicate glass for a lamp bulb has a composition, based on oxides, consisting of, by mass, >55 to 64% SiO<SB>2</SB>, 13 to 18% Al<SB>2</SB>O<SB>3</SB>, 0 to 5.5% B<SB>2</SB>O<SB>3</SB>, 0 to 7% MgO, 5 to 14% CaO, 0 to 8% SrO, 6 to 17% BaO, 0 to 2% ZrO<SB>2</SB>, 0 to 0.3% CeO<SB>2</SB>, 0 to 0.5% TiO<SB>2</SB>, 0.01 to 0.035% CoO, and 0.005 to 0.05% Fe<SB>2</SB>O<SB>3</SB>. COPYRIGHT: (C)2003,JPO
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