HEAT-ABSORBING GLASS Russian patent published in 1996 - IPC

FIELD: glass industry. SUBSTANCE: heat-absorbing glass has, wt.-%: silicon oxide (SiO₂) 65-68; sodium oxide (Na₂O) 12-14; potassium oxide (K₂O) 2.5-4; magnesium oxide (MgO) 2-3; calcium oxide (CaO) 4.2-5.5; aluminium oxide (Al₂O₃) 3-4; ferrous oxide (FeO) 2.7-4.1. Total content of alkaline metal oxides is 15-17. Glass can contain additionally, wt.-%: lithium oxide (Li₂O) up to 3; barium oxide (BaO) up to 2, and boron oxide (B₂O₃.) up to 1. Glass can be used in medicine for sensitive material encapsulation and implantation in living body and for ampoule making. EFFECT: improved quality of glass. 2 cl, 2 tbl