系统研究了Eu2+、Dy3+共激活的铝酸锶长余辉发光材料的发光特性与Al/Sr比例的关系.采用高温固相法合成了Al/Sr从1.0到12.0的一系列样品，对其进行了XRD和荧光光谱测试，当Al/Sr＝2.0、3.5、10.0时，分别得到了SrAl2O4:Eu2+,Dy3+、Sr4Al14O25:Eu2+,Dy3+、SrAl12O19:Eu2+,Dy3+的纯相，其它比例时得到的是不同铝酸锶化合物的混合物，样品的相组成呈明显的过渡性变化，导致样品的发光颜色随Al/Sr比例的增大，从蓝绿光向短波长方向移动，最终到达紫光.
The relation between properties of strontium aluminate phosphor and Al/Sr ratio was investigated. A series of strontium aluminate phosphors with different Al/Sr ratios from 1.0 to 12.0 were synthesized by solid-state method. The samples were characterized by X-ray diffraction and photoluminescence spectra. The results reveal that single phases of SrAl2O4:Eu2+,Dy3+, Sr4Al14O25:Eu2+,Dy3+ and SrAl12O19:Eu2+,Dy3+ are obtained with Al/Sr ratios of 2.0, 3.5 and 10.0 respectively. When Al/Sr selects other values, the final products are mixture. Moreover, the emission spectra of the samples shift to blue-ultraviolet short wavelength from yellow-green long wave with the increase of Al/Sr ratios, which result from change of products’ composition.
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