Abstract

Red nanofluorescent materials based on CaWO₄:Eu³⁺ were prepared by the molten salt method. Spherical CaWO₄ particles with a size of 100 nm to 200 nm monodisperse sizes were prepared using different types of calcium salts. The KCl was chosen as the molten salt, under the same other experimental parameters, the obtained CaWO₄:Eu³⁺ particles were more uniform, the diffraction properties were better. With a molar ratio of 15 for molten salt and Calcium salt, more spherical CaWO₄:Eu³⁺ particles were produced small and sand homogeneous size. Using different amount of molten salt, it was found that the larger the amount of molten salt, the weaker the fluorescence property. Finally, by comparing the products obtained by the molten salt method with the solid state reaction method, it is found that the luminescence intensity of the products is 20% higher than that obtained by the solid state reaction method.

摘要

采用熔盐法制备了基于CaWO ₄ :Eu ^{3+的红色纳米荧光材料。}使用不同类型的钙盐制备具有100 nm至200 nm单分散尺寸的球形CaWO _4颗粒。选用KCl作为熔盐，在其他实验参数相同的情况下，得到的CaWO ₄ :Eu ³⁺颗粒更均匀，衍射性能更好。熔盐和钙盐的摩尔比为15，更球形的CaWO ₄ :Eu ³⁺产生的颗粒小且砂粒尺寸均匀。使用不同量的熔盐，发现熔盐量越大，荧光性能越弱。最后，通过熔盐法与固相反应法得到的产物的比较，发现产物的发光强度比固相反应法得到的发光强度高20%。