Lead-free glasses exhibiting characteristics of crystal

Details Lead-free glasses exhibiting characteristics of crystal Lead-free glasses exhibiting characteristics of crystal

C - Chemistry, Metallurgy

03

C

C03C 3/076 (2006.01) C03C 3/078 (2006.01) C03C 3/085 (2006.01) C03C 3/087 (2006.01) C03C 3/095 (2006.01) C03C 4/00 (2006.01)

Patent

CA 2137122

The present invention relates to the production of lead-free glasses exhibiting densities of at least 2.9 g/cm3 and refractive indices of at least 1.545 which consist essentially, in weight percent, of SiO2 51-63 Al2O3 0-5 Li2O 0-3 ZrO2 0-6 Na2O 0-8 SiO2+Al2O3+ZrO2 55-66 K2O 0-12 TiO2 0-3 Li2O+Na2O+K2O 7-15 CaO 0-5 SrO 0-<8 MgO 0-3 BaO >13-21 B2O3 0-3 ZnO 5-15 La2O3 0-8 SrO+BaO+ZnO 27-34

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