| 摘要 |
PROBLEM TO BE SOLVED: To provide a glass composition optimum as a sealed container of a quartz resonator. SOLUTION: The glass composition which is 130 to 150x10<SP>-7</SP>/°C in the coefficient of thermal expansion at 25°C and contains, by mol%, 50 to 80% SiO<SB>2</SB>, 0 to 15% Al<SB>2</SB>O<SB>3</SB>, 0 to 15% ZrO<SB>2</SB>, 0 to 15% TiO<SB>2</SB>, where 5 to 15% Al<SB>2</SB>O<SB>3</SB>+ZrO<SB>2</SB>+TiO<SB>2</SB>, 0 to 20% Li<SB>2</SB>O, 0 to 20% Na<SB>2</SB>O, 0 to 20% K<SB>2</SB>O, where 15 to 30% Li<SB>2</SB>O+Na<SB>2</SB>O+K<SB>2</SB>O, 0 to 20% MgO, 0 to 20% CaO, 0 to 20% SrO, 0 to 20%BaO, and 0 to 20% ZnO, the sealed container of the quartz resonator using the same and the quartz resonator using the sealed container are included. COPYRIGHT: (C)2005,JPO&NCIPI
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