Patent ID: 8119999
Filing Date: 2012-02-21
Classification: C03C,G21F

Abstract:
1. A radiation-shielding glass, comprising a glass composition in % by mass of 10 to 35% SiO 2 , 55 to 80% PbO, 0 to 8% B 2 O 3 , 0 to 10% Al 2 O 3 , 0 to 10% SrO, 0 to 10% BaO, 0 to 10% Na 2 O, and 0 to 10% K 2 O, wherein: the glass composition further includes 200 ppm or less of Fe the radiation-shielding glass has a total light transmission at a wavelength of 400 nm at a thickness of 10 mm of 50% or more, and the radiation-shielding glass has a chromaticity for a C light source calculated from a total light transmission at a wavelength of 380 to 700 nm in a region surrounded by X and Y coordinates (X, Y)=(0.3101, 0.3160), (0.3250, 0.3160), (0.3250, 0.3400), and (0.3101, 0.3400).