爆轰和燃烧法合成SrAl2O4：Eu2+，Dy3+纳米发光粉

 在低温条件下分别用爆轰法和燃烧法制备出了SrAl₂O₄：Eu²⁺，Dy³⁺ 纳米发光粉。从合成条件、热处理温度等方面详细对比了爆轰法和燃烧法对所制备的SrAl₂O₄：Eu²⁺，Dy³⁺纳米发光粉的晶体生长行为、粒子形貌和光学性质等的影响。研究表明，随着热处理温度的升高，爆轰法制备的纳米发光粉的平均粒径逐渐增大，而燃烧法制备的纳米发光粉的平均粒径先减小后增大，在600 ℃时平均粒径存在一个极小值。在同样热处理温度下，爆轰法制备的纳米发光粉的平均粒径增长明显高于燃烧法合成的纳米发光粉的平均粒径。最后讨论了长余辉的发光机理，并给出了如何改进合成方法的建议。

Synthesis of SrAl2O4:Eu2+,Dy3+ Nanometer Phosphors by Detonation and Combustion Method

The SrAl2O4:Eu2+,Dy3+(SED) nanometer phosphors were synthesized at lower temperature by detonation and combustion method,respectively.The effects of synthesis conditions,annealing temperature on the growth behavior,the particle morphologies and optical properties of the as-prepared SED particles were contrasted.It was showed that the mean size of the SED particles prepared by detonation method increased gradually with increasing heat treatment,and that the mean size of the SED particles prepared by combustion method decreased firstly and then increased quickly and had a minimal value at 600 ℃.The mean size of the SED particles prepared by detonation method increased more quickly than that of the SED particles prepared by combustion method at same annealing temperature.Finally,the mechanism for the long afterglow was discussed and some suggestions on how to improve the synthesis methods were also presented.