Zinc-containing phosphate glasses

Details Zinc-containing phosphate glasses Zinc-containing phosphate glasses

C - Chemistry, Metallurgy

03

C

261/11

C03C 3/19 (2006.01) C03C 3/16 (2006.01) C03C 3/17 (2006.01)

Patent

CA 1333073

This invention is directed to the preparation of glasses exhibiting a transition temperature below 450°C, a working temperatures below 500°C, and excellent resistance to attack by water and mild aqueous alkaline solutions. The glasses consist essentially, in mole percent, of: P2O5 28-40 PbO 0-35 ZnO 12-55 SnO 0-35 Al2O3 0-6 PbO+SnO 0-35 Li2O 0-25 CaO 0-10 Na2O 0-25 MnO 0-10 K2O 0-25 MgO 0-10 Li2O+Na2O+K2O 10-35 CaO+Cu2O+MgO 0-10 F 0-5 Cu2O 0-15 B2O3 0-8 At least two alkali metal oxides must be present.

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