| 摘要 |
A phosphorescent phosphor having excellent afterglow luminance characteristics, even under low illumination intensity of radiation conditions, compared to conventional strontium aluminate phosphorescent phosphors of the same type, and particularly a phosphorescent phosphor having excellent initial afterglow luminance characteristics, with following requirements: 0.015<Eu/(Sr+Eu+Dy)<=0.05, 0.4<=Dy/Eu<=2, and 2.02<=Al/(Sr+Eu+Dy)<=2.4.
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