在微波场作用下合成了Sr2Al6O11:Eu^2+x%(质量分数)(H3BO3)(x=0、1.5、3、5、7、9)系列蓝色光致发光材料。X射线粉末衍射(XRD)结果表明,未加硼酸作助熔剂时,产品的主相为SrAl2O4硼酸在x=1.5~9之间产品的主相都为Sr2Al6O11。扫描电镜(SEM)观测结果:适量硼酸的加入有助于晶体的形成,硼酸的量为0时,产物为颗粒,硼酸量为x=1.5时,开始出现棒状晶体,当硼酸量为x=5时,产物主要为棒状晶体,当硼酸量x〉7时,产品明显团聚。荧光光谱显示:随硼酸量的增加,产品发光强度先增强后减弱,硼酸加入量为x=7,发光强度最高。Eu^2+在Sr2Al6O11中存在两个发光中心,发射峰分别位于456.7nm(Eu^2+1)和483.4nm(Eu^2+2)。当硼酸量〉7%(质量分数)时,发射峰红移,归因于硼酸对两种位置Eu^2+的发光性能有不同的影响。
The blue luminescence materials of Srz Al6O11: Eu^2+ + xw 0% (H3 BO3 ) (x = 0,1.5,3,5,7,9) were synthesized by microwave radiation method. The X-ray diffraction(XRD) showed that SrAl2O4 is the dominant host phases with x = 0, Sr2Al6 O11 is the dominant host phases with x = 0. 015-0.09. Scanning electron microscopy (SEM) showed that dropping into desirable H3BO3 will make for the formation of crystal. Most of the sample were granule with x=0, the sample were stick shaped crystal with x=0.05, the sample were nitrification with x 〉0.07. The emission spectra of fluorescence showed that the amount of H3 BO3 affect the luminescence proper- ties of Sr2Al6O11: Eu^2+ intensively,the optimum fraction of H3BO3 is 0.07. There are two fluorescent centers in Sr2Al6O11 and two peaks of Eu^2+ lied in 456.7 and 483.4nm,The amounts of H3BO3 affect the position of the peaks and the emission peaks were red-shift due to the different effect on the luminescent properties of Eu^2+ at the two sites by H3BO3.