Preparation of Non-Grinding Long Afterglow SrAl_2O_4:Eu~(2+), Dy~(3+) Material by Microwave Combustion Method

摘要

The non-grinding long afterglow material SrAl_2O_4: Eu~(2+), Dy~(3+) was prepared by combustion method in home microwave oven directly, after dispersant, frother, comburent, and mineralizer were added into the reacting system. XRD analysis showed that the powders were nearly pure SrAl_2O_4 phase with few other phases, and the size of the grain was 41.1 nm. Fluorescence spectrum results indicated that there were 2 excitation peaks located at 345 and 400 nm, and the emission peak located at 516 nm, afterglow lasted up to 30 min or more. The microwave combustion method has advantages of less time, low temperature and no grinding process, and the material made by the method has good luminescent property.