以正硅酸乙酯为硅源,用水热法制备了SiO2@ZnWO4:Eu3+荧光粉,对样品分别进行了X射线衍射(XRD)、透射电镜(TEM)、荧光光谱(PL)等表征.XRD结果表明,当水热反应温度为180℃,反应时间12小时,可以得到ZnWO4的纯相.TEM和EDS结果表明,样品中含有Si、Eu、O、Zn、W元素.荧光光谱结果表明,SiO2@ZnWO4:Eu3+荧光粉能够被393 nm的紫外光激发,在615 nm处发出红色荧光,且SiO2@ZnWO4:Eu3+荧光粉的发射光谱中电偶极跃迁5D0→7F2强度大于磁偶极跃迁5D0→7F1的强度,表明Eu3+在其中处于没有对称中心的格位.
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