【机 构】
：
西安航空学院材料工程学院,陕西西安710077西安建筑科技大学理学院,陕西西安710055
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通过固相反应法合成了一种新型硼酸盐荧光粉K6Ba4B8O19∶x%Eu
3 ,并测得其荧光量子效率。结果表明,实验合成了接近纯相的K6Ba4B8O19基质;当合成温度为750 ℃时,K6Ba4B8O19∶5%Eu
3 的X射线衍射谱与K6Ba4B8O19标准卡片符合较好;在395 nm波长激发下,K6Ba4B8O19∶Eu
3 在592 nm(
5D0F1)和613 nm(
5D07F2)处分别有橘红光和红光发射峰;荧光发射强度随Eu
3 摩尔分数的增大而增大,当Eu
3 摩尔分数为6%时达到最大值。测得K6Ba4B8O19∶6%Eu
3 在激发波长395 nm下的荧光量子效率值为4.51%。获得的粉体呈不规则颗粒状。
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