| 摘要 |
PROBLEM TO BE SOLVED: To improve the melting characteristic of a lead- and arsenic-free borosilicate glass to reduce the number of glass defects such as knots, stones and cords. SOLUTION: The melting rate of the glass is improved dramatically by producing a composition substantially free of MgO and CaO and adding 1.0 to 4.0 mass% BaO. COPYRIGHT: (C)2004,JPO
|
