| 摘要 |
PROBLEM TO BE SOLVED: To provide Li<SB>2</SB>O-Al<SB>2</SB>O<SB>3</SB>-SiO<SB>2</SB>crystallized glass which, even when the used amount of As<SB>2</SB>O<SB>3</SB>is reduced, has clarity and glass properties at least equivalent to those of a conventional product. SOLUTION: The crystallized glass comprises, in terms of mass%, 50-80% SiO<SB>2</SB>, 12 to 30% Al<SB>2</SB>O<SB>3</SB>, 1 to 6% Li<SB>2</SB>O, 0 to 5% MgO, 0 to 10% ZnO, 0 to 8% BaO, 0 to 5% Na<SB>2</SB>O, 0 to 10% K<SB>2</SB>O, 0 to 8% TiO<SB>2</SB>, 0 to 7% ZrO<SB>2</SB>, and 0 to 7% P<SB>2</SB>O<SB>5</SB>and further contains 0.0002 to 5μL/g (0°C, 1 atm) helium and/or neon. COPYRIGHT: (C)2005,JPO&NCIPI
|
