以无机盐为原料,成功地制备了均一、稳定、透明的SrAl2O4溶胶.系统地研究了无机盐溶胶一凝胶工艺制备SrAl2O4:Eu2+,Dy3+长余辉发光粉体的工艺条件及其影响因素,并通过透射电镜和荧光光谱分析对粉体的微结构、表面形态及发光性能进行了表征.实验结果表明,在适宜的工艺条件下,可制备颗粒均匀的针状纳米发光粉体,其发光特性与传统的高温固相烧结法相似,但烧结温度可降低300℃左右.
The stable transparent sol of SrAl2O4 was successfully prepared by using cheap inorganic materials
as precursors. The uniform needle-like nano-powders were synthesized at low temperature and reduce atmosphere. The conditions and factors of preparing
the long afterglow powders of SrAl2O4:Eu2+,Dy3+ by sol-gel process were reported systematically. The microstructures and surface shapes
of samples were observed by the transmission electron microscope (TEM). The crystallization processes were determined by the X-ray diffractometer
(XRD). The luminescent properties were studied by the fluorescence spectrophotometer. The experimental results show that the luminescent features of samples
synthesized by the sol-gel process under the proper conditions are similar to those by solid-state reaction process, but the sintering temperature is reduced about 300℃.
参考文献
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