| 摘要 |
FIELD: optical engineering. ^ SUBSTANCE: invention is dealing with optical and electronic appliances and can be used when manufacturing information storage systems. Light-accumulating luminophor has formula Mg1-x-y-zSrxEu2+yMn2+z(SigmaTR)pAlqO4, where SigmaTR = Dy, Nd, Ce; x = 0.80-0.96; y 0.001-0.03; z = 0.005-0.010; p = 0.01-0.05; 1.99 <= q <= 2.05. Optimal ratio Dy2O3/Nd2O3/Ce2O3 varies between 1:1:1 and 6:3:1. When excited with ultraviolet light having wavelength no more than 365 nm, photoluminophor emits in green spectral region with dominant wavelength 525 nm. When emitting accumulated summary light, emission spectrum of luminophor shifts to short-wave region. Preparation of photoluminophor comprises primarily grinding mixture of strontium hydroxide, aluminum hydroxide, magnesium oxide, and manganese carbonate in stoichiometric proportions on vibrating mill during 0.5-1 h. Ground blend is impregnated with solutions of following activators: Eu(NO3)3, Dy(NO3)3, Nd(NO3)3, and Ce(NO3)3.Second grinding is effected for 2-6 h on vibrating mill to achieve specific surface above 24.0.10-3 cm2/g. Reground blend is granulated, calcined for 0.5-2 h at 800-900, and subjected to intermediate grinding on vibrating mill. Resulting material is thermally treated for 7-10 h in flow-type multizone furnace gradually raising temperature from 20 to 1330 in dissociating ammonia atmosphere at pressure 10 to 100 mm Hg, after which cooled in the last zone to 220. Thus obtained luminophor has semi-diurnal emission cycle at high brightness level. ^ EFFECT: enhanced luminescence efficiency, increased water and atmosphere resistance, eliminated abrasiveness if grains, and increased productivity of preparation process. ^ 4 cl, 3 tbl |
