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采用高温固相法在碳粉还原气氛下合成蓝色长余辉发光材料Sr2MgSi2O7∶Eu2+,Dy3+。通过正交试验,以初始余辉亮度和余辉时间为评价指标,研究了烧结温度、Eu2+、Dy3+和硼酸的摩尔分数对发光材料余辉性能的影响。结果表明:各个因素在实验设定水平范围变化时,最佳合成工艺为烧结温度1300℃,Eu2+、Dy3+和硼酸的摩尔分数分别为2%,4%,10%。按照上述工艺条件合成的样品余辉性能最佳,初始余辉亮度可达2238mcd/m2,余辉时间超过1400s。样品具有250nm～450nm的激发范围,发射峰位于470nm。
The long-lasting blue luminescent material Sr2MgSi2O7:Eu2 +, Dy3 + was synthesized by high temperature solid-state reaction under reducing atmosphere. The effects of sintering temperature, Eu2 +, Dy3 + and boric acid mole fraction on the afterglow properties of the luminescent materials were studied by orthogonal test with the initial afterglow brightness and the afterglow time as evaluation indexes. The results show that the optimal synthesis temperature is 1300 ℃ and the molar fractions of Eu2 +, Dy3 + and boric acid are 2%, 4% and 10%, respectively. According to the above process conditions, the best afterglow performance of synthesized samples is that the initial afterglow brightness can reach 2238mcd / m2 and the afterglow time exceeds 1400s. The sample has an excitation range of 250 nm to 450 nm and the emission peak is at 470 nm.