Lead-free fine crystal glassware

Details Lead-free fine crystal glassware Lead-free fine crystal glassware

C - Chemistry, Metallurgy

03

C

C03C 3/076 (2006.01) C03C 3/078 (2006.01) C03C 4/00 (2006.01)

Patent

CA 2097872

This invention relates to fine glass crystal prepared from lead-free glass compositions. The glasses consist essentially, in weight percent, of SiO2 54-64 BaO 8-13 Li2O 0-3 SrO 8-13 Na2O 0-6.5 ZnO 5.5-9 K2O 0-7 BaO+SrO+ZnO 22-33 Li2O+Na2O+K2O 8-15 wherein at least two of Li2O, Na2O, and K2O are present and are present in essentially equimolar ratios.

'invention a trait à un cristal de verre fin préparé à partir de compositions de verre sans plomb. Les verres sont constitués essentiellement, en pourcentage massique, de SiO2 54-64 BaO 8-13 Li2O 0-3 SrO 8-13 Na2O 0-6.5 ZnO 5.5-9 K2O 0-7 BaO+SrO+ZnO 22-33 Li2O+Na2O+K2O 8-15 où au moins deux des Li2O, Na2O et K2O sont présents et le sont dans des proportions essentiellement équimolaires.

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