| 摘要 |
PROBLEM TO BE SOLVED: To provide a glass composition having a suitable thermal expansion coefficient, a low melting temperature and a high strain point, and particularly suitable to a glass substrate used in a display field and requiring high heat resistance such as a substrate for an electronic display such as a PDP (plasma display panel). SOLUTION: The substrate glass for a display device substantially comprises, by wt.%, 55 to 60 SiO<SB>2</SB>, 4 to 12 Al<SB>2</SB>O<SB>3</SB>, 2 to 6% Na<SB>2</SB>O, 4 to 8 K<SB>2</SB>O, 8 to 12 R<SB>2</SB>O (in the total of Na<SB>2</SB>O and K<SB>2</SB>O), 0 to 4 MgO, 6 to 10 CaO, 0 to 6 SrO, 10 to 14 BaO, 20 to 26 R'O (in the total of MgO, CaO, SrO and BaO), and 0 to 4 ZrO<SB>2</SB>. The average linear expansion coefficient at 30 to 300°C is 80 to 84(×10<SP>-7</SP>/°C), and its strain point is≥570°C. COPYRIGHT: (C)2008,JPO&INPIT
|
