中文摘要：

使用共沉淀法成功制备出了纳米晶CaWO4：Eu^3＋发光粉体。样品的XRD衍射图样显示了样品为单相的体心四方晶系CaWO4。对比不同掺杂浓度和不同煅烧温度样品发射谱，发现不同条件下的样品激发峰强度不同，Eu^3＋在配位场中占据在低对称的格位。对样品强发射峰进行监测，可观测到样品中的基质和Eu^3＋离子之间存在能量传递。在相同的激发条件下，发现荧光强度随着掺杂浓度变化，将Eu。＋掺杂到CaW04基质中会发生浓度猝灭，掺杂Eu^3＋的最佳浓度为5mol%。

英文摘要：

The nanocrystalline CaWO4：Eu^3＋ samples were prepared with the co-precipitation method. The XRD pattern of CaWO4 ：Eu^3＋ showed that the crystalline phases of these samples are single-phase cubic. Luminescent properties of these powders with different sintering temperatures and doped concentrations show that the rare earth ions occupy dissymmetrical position in the samples. The energy transfer was observed between the nanocrystalline CaWO4 ：Eu^3＋ host and the rare earth ion Eu^3＋. The effect of the doped EU^3＋ concentration on the fluorescence emission intensity was discussed, and the results showed that the concentration quenching depends on the doped Eu^3＋ concentration. The optimum concentration for the luminescence of Eu^3＋ is determined to be 5 mol%.