Abstract:

CaWO₄ with different morphologies were prepared with microemulsion route and characterized by XRD，FESEM and PL spectra. With careful control of the surfactant CTAB concentration in the microemulsion system，CaWO₄ with quasisphere-like，flower ball-like and spindle-like morphologies were obtained，respectively. CaWO₄ samples have a tendency to become larger in size with the increase in reactant concentration and reaction time. Room temperature PL spectra of the CaWO₄ samples are peaked at 410—430 nm，the luminous intensity and peak position are different for samples with different morphology.

摘要：

利用微乳液法合成出了不同形貌的CaWO₄材料，利用XRD、FESEM和PL谱对样品的结构、形貌和光致发光性能进行了表征。通过改变微乳液体系中表面活性剂CTAB浓度得到了近球状、花球状及纺锤体状等结构的CaWO₄材料。增加反应物的浓度和反应时间，CaWO₄样品的体积有进一步增大的趋势。CaWO₄样品的室温PL谱表明样品的发光峰位于410～430 nm内，不同形貌的CaWO₄样品的发光峰位置和发光强度不同。