| 摘要 |
PCT No. PCT/US93/09260 Sec. 371 Date Apr. 4, 1995 Sec. 102(e) Date Apr. 4, 1995 PCT Filed Oct. 4, 1993 PCT Pub. No. WO94/07805 PCT Pub. Date Apr. 14, 1994A lithium-free glass composition containing 64 to 75% SiO2, 11 to 16% total of a matrix compound selected from a first group which is B2O3, and BaO, or from a second group which contains Al2O3, MgO, CaO and ZnO, above 10% Na2O as a modifier, 0 to 7% K2O as a modifier, and 0.1 to 15% Ce2O3 as a dopant. When the matrix compound is a member of the group B2O3 and BaO, MgO, CaO and ZnO can be present in an amount of 0 to 5% as an additional modifier. The glass of the invention has the properties of high transmittance of radiation of wavelength greater than 370 m mu , substantially complete absorbance of radiation of wavelength below 350 m mu , and detection of ultraviolet and ionizing radiation with a decay of luminescence of below 45 nanoseconds. |
