| 摘要 |
PURPOSE:To improve the peak height of luminescence, by dissolving yttrium oxide in a bivalent europium-activated strontium aluminate phosphor. CONSTITUTION:Starting materials for phosphor, such as yttrium oxide, strontium oxide, aluminum oxide and europium oxide or nitrates or halides of these elements are weighed. A small quantity of boric acid, etc. is added thereto and the mixture is crushed and mixed with one another in a ball mill, packed in a quartz boat and calcined at 1,100-1,600 deg.C in a reducing atmosphere for several hour to obtain the desired phosphor. The peak height of luminescence of the resulting phosphor generated by ultraviolet light excitation is 105-110% of that of conventional europium-activated strontium aluminate phosphor contg. no yttrium oxide.
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