| 摘要 |
1,136,658. Fluorophosphate glass. ERNST LEITZ G.m.b.H. 8 Dec., 1966 [31 Dec., 1965], No. 54962/66. Heading C1M. The mix comprises (in mol per cent) 70-85 of fluorides of Mg, Ca, Sr, Ba 10-25 of metaphosphates of Mg, Ca, Sr, Ba, A1 0-10 of at least one of KAsO 3 , K 2 TaF 7 , K 2 TiF 6 - Also 0-3 of LaPO 4 and compatible ingredients and impurities. |
