【作者】 李中田；

【导师】 闫景辉；

【作者基本信息】 长春理工大学 ， 无机化学， 2007， 硕士

【摘要】 采用十六烷基三甲基溴化铵／正丁醇／正辛烷／水（或盐溶液）微乳液体系，利用微乳液方法制备出BaF2：Ce³⁺、BaLiF3：Ce³⁺、BaYF₅：Ce³⁺和NaMgF₃：Ce₃₊纳米粒子；通过X射线衍射（XRD）确定了所制备样品的结构，并运用谢乐公式计算了样品的粒径，结果表明其粒径均在纳米范围之内；运用环境扫描电镜（ESEM）观察了BaF₂：Ce³⁺的形貌和粒径尺寸；将纳米粒子的荧光光谱与相应体相材料的荧光光谱进行了对比，发现两种荧光光谱有很大不同，同时对上述所制备纳米粒子的荧光光谱进行了相互比较和分析。 采用相同的微乳液体系，利用微乳液法结合水热技术在不同水热时间条件下制备出BaLiF₃：Er³⁺纳米粒子（水热温度为180℃）：通过XRD确定了所制备样品的结构，利用谢乐公式计算了样品的粒径，结果表明其粒径在纳米范围之内；用透射电镜（TEM）观察了制得的BaLiF₃：Er³⁺纳米微粒（水热65h）的形貌和粒径尺寸；用红外荧光光谱仪进行测试，发现BaLiF₃：Er³⁺纳米微粒在1540nm处(⁴I_13／2→⁴I_15／2)出现了强发射峰。实验证明，水热技术的采用对阻止BaF₂杂质相的生成具有重要作用。更多还原

【Abstract】 Nanoparticles of NaMgF₃:Ce³⁺, BaLiF₃:Ce³⁺, BaYF₅:Ce³⁺ and BaF₂:Ce³⁺ were prepared from the quaternary microemulsions of CTAB, n-butanol, n-octane and water or brine solution. The X-ray diffraction （XRD） patterns were indexed to pure BaF₂, BaLiF₃, BaYF₅ and NaMgF₃ phases. The diameter of the particales, calculated with the help of Debye-Scherrer equation, revealed that these particales were nanoparticals. ESEM images showed the shape and diameter of BaF₂:Ce³⁺ nanoparticles. The spectrum of prepared nanoparticles was observed and discussed. Compared with their powder crystal prepared by high temperature solid reaction, the peaks of the fluorescent spectra changed.Nanoparticles of BaLiF₃:Er³⁺ were prepared from the quaternary microemulsions of CTAB, n-butanol, n-octane and water by hydrothermal method. The X-ray diffraction （XRD） patterns were indexed to a pure BaLiF₃ phase. The diameter of the particales was calculated by Debye-Scherrer equation, which was within the range of nanometer. Transmisson electron microscopy （TEM） images proved BaLiF₃:Er³⁺ （hydrothermally treating for 65 h） nanoparticles spherical. The fluorescence emission band of BaLiF₃:Er³⁺ nanoparticles peaked at 1540 nm (⁴I_13/2 →⁴I_15/2). The research showed that hydrothermal method was important in suppressing the appearance of BaF₂ impurity.更多还原