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以二氧化锰为微波吸收剂,采用微波辐射法成功合成了CaMoO4∶Eu3+红色发光材料.用X射线粉末衍射仪、扫描电子显微镜、荧光分光光度计分别对样品的物相结构、形貌和发光性质进行了分析和表征.结果表明:所合成的CaMoO4∶Eu3+晶体结构与CaMoO4相似,属四方晶系结构;样品大颗粒呈立方形,尺寸约4~8 μm,是由200 ~ 300nm的类球形颗粒组装而成.样品的激发光谱由位于200 ~ 350 nm的一个宽带和350 ~ 500 nm的一系列尖峰组成,最大激发峰位于305 nm处;发射光谱由位于550 ~750 nm的一系列尖峰组成,最强的发射峰位于617 nm处,归属于Eu3+的5D0→7F2跃迁.当反应时间为40 min,微波功率为中高火,电荷补偿剂Li+的掺杂量为8mol%时,样品的发光强度最大,约为未掺杂电荷补偿剂样品的4倍.

参考文献

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