| 摘要 |
PROBLEM TO BE SOLVED: To provide a zinc phosphate-based lead-free glass composition having a low softening point of 600°C or lower. SOLUTION: The zinc phosphate-based lead-free glass composition is characterised by containing, in mass% in terms of an oxide, 1-25% of P<SB>2</SB>O<SB>5</SB>, 30-50% of ZnO, 20-45% of B<SB>2</SB>O<SB>3</SB>and 5-30% of BaO, and further containing 0.05-15% in total of one kind or more selected from among K<SB>2</SB>O, Na<SB>2</SB>O and Li<SB>2</SB>O. COPYRIGHT: (C)2007,JPO&INPIT
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