Glass composition

文件类型：PDF文档
文件大小：235K
A radiation shielding glass free from lead component and containing rare earth oxides in large amounts that exhibits shielding capability comparable to that of lead glass and has high surface hardness, being extremely high in the transparency in visible region. There is provided a glass composition comprising more than 25% to 90%, by mass% on oxide basis, of the sum of Gd2O3 and/or Dy2O3and/or Lu2O3 and exhibiting a lead equivalent to 150 kV X-rays of 0.03 mmPb/mm or greater. A glass enhanced in stability against devitrification and excelling in transparency and radiation shielding capability can be obtained by incorporating 10 to 70% of the sum of SiO2 and/or B2O3 and/or GeO2 and/or P2O5, 0 to 5% M2O3, 0 to 30% ZnO, 0 to 10% RO and 0 to 10% Rn2O.