Radiopaque glass and use thereof
AssigneeSchott AG
InventorsUlf Dahlmann, Sabine Pichler-Wilhelm, Jens Suffner, Simone Monika Ritter
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Abstract
The invention relates to a radiopaque glass having a refractive index nd of 1.480 to 1.561, this glass, apart from impurities at most, being free from SrO and PbO. The glass is based on the SiO2, Al2O3 and B2O3 system. The radiopacity can be adjusted using Cs2O in particular in combination with BaO and/or SnO2 optionally in conjunction with fluorine. The glass may be used in particular as dental glass or as optical glass.
Claims18
Radiopaque glass comprising BaO and being free from PbO apart from impurities at most, wherein the glass has a refractive index nd in the refractive index range between 1.480 and 1.561 and has a relative aluminium equivalent thickness ALET (%) which is greater than or equal to a minimum relative aluminium equivalent thickness (min. relative ALET) which is determined by the following equation:
- min. relative ALET (%)=C*nd−D, where C=11000 and D=16160.
Dependencies are inferred from the claim text.