LEAD-FREE GLASSES EXHIBITING CHARACTERISTICS OF CRYSTAL

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+...

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Bibliographic Details
Main Author COMTE, MARIE J. M
Format Patent
LanguageEnglish
French
Published 15.06.2004
Edition5
Subjects
CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS
CHEMISTRY
GLASS
JOINING GLASS TO GLASS OR OTHER MATERIALS
METALLURGY
MINERAL OR SLAG WOOL
SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS
SURFACE TREATMENT OF GLASS
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Summary: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
Bibliography:Application Number: CA19942137122