abstract |
(57) [PROBLEMS] To obtain a glass composition which is lead-free, has a low melting point, and is excellent in chemical weather resistance. SOLUTION: ZnO: 15 to 55, P 2 O 5 : 30~75, Li 2 O + Na 2 O + K 2 O: 0~2. 8, Al 2 O 3 : 0.1 to 5, SnO 2 + TiO 2 + Z rO 2: 0.1~2, Bi 2 O 3: 0~30, SiO 2: 0~5, B 2 O 3 : 0~10, V 2 O 5 + Tl 2 O 3 : 0-5, F: 0-2. |