| 摘要 |
PROBLEM TO BE SOLVED: To provide a non-lead glass for covering electrodes excellent in chemical durabilities and used for covering electrodes of a PDP rear substrate. SOLUTION: The non-lead glass for covering electrodes essentially comprises, by mol% in terms of oxides, 25-55% SiO<SB>2</SB>, 4-25% B<SB>2</SB>O<SB>3</SB>, 5-30% ZnO, 0-10% Al<SB>2</SB>O<SB>3</SB>, 0-10% TiO<SB>2</SB>, 0-17% Li<SB>2</SB>O, 0-10% Na<SB>2</SB>O+K<SB>2</SB>O, 0-25% Bi<SB>2</SB>O<SB>3</SB>, and 0-3% of CoO+CuO+CeO<SB>2</SB>+SnO<SB>2</SB>, with the proviso that when it comprises Al<SB>2</SB>O<SB>3</SB>the amount of B<SB>2</SB>O<SB>3</SB>+Al<SB>2</SB>O<SB>3</SB>is 26 mol% or less and when it comprises TiO<SB>2</SB>, Na<SB>2</SB>O or K<SB>2</SB>O it satisfies (TiO<SB>2</SB>+4 mol%)≥(Na<SB>2</SB>O+K<SB>2</SB>O). COPYRIGHT: (C)2007,JPO&INPIT
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