硼酸对蓝色铝酸锶长余辉材料的物相及发光特性的影响  

Effect of Boric Acid on Phase and Luminescence Properties of Blue Long Afterglow Strontium Aluminate Phosphors

作　　者：薛红伟[1] 崔彩娥[1] 郝虎在[1] 黄平[1] 

机构地区：[1]太原理工大学理学院,太原030024

出　　处：《功能材料与器件学报》2010年第1期81-84,共4页Journal of Functional Materials and Devices

基　　金：山西省科技攻关项目(2007031141);山西省自然科学基金项目资助(2007011061)

摘　　要：采用高温固相法制备了xSrO·yAl2O3:Eu2+,Dy3++m%(摩尔分数)(H3BO3)(m=15,20,23,25,30,35)系列蓝色光致发光材料。X射线衍射(XRD)结果表明:m=15～20之间产品为SrAl2O4,Sr2Al6O11和Sr4Al14O25的混合物,m=23时产品主相为Sr2Al6O11,m=25～35之间产品主相为Sr4Al14O25。利用荧光分光光度计和亮度计研究了材料的发射光谱,衰减曲线,结果显示:随着硼酸量的增加,发射峰值先蓝移后红移,而余辉时间则逐渐变长。从而得到了制备蓝色铝酸锶发光材料Sr2Al6O11:Eu2+,Dy3+的最佳硼酸量,并且对硼酸在材料合成过程中的作用机理进行了探讨。The blue luminescence materials of xSrO·yAl2O3：Eu^2＋,Dy^3＋＋m% （molar fraction） （H3BO3 ）（ m = 15,20,23,25,30,35 ）were synthesized by the conventional solid state reaction method. The X-ray diffraction （XRD） showed that the phosphors are compounds of SrAl2O4, Sr2Al6O11 and Sr4Al14O25 with m = 15 -20, Sr2Al6O11 is the dominant host phases with m =23, Sr4Al14O25 is t he dominant host phases with m = 25 -35. The emission spectra and afterglow curves were investigated by speetrofluorometer and photometer. The results reveal that with the increase of amount of H3BO3 , the emission peak is shifted to the shorter wavelength side, and then to the longer wavelength side; and the afterglow time increase all the times. The optimum amount of H3BO3 to synthesize the blue strontium aluminate phosphors is obtained, and then this paper explained the function of boric acid in the synthesis of the material.

关 键 词：硼酸 铝酸锶 蓝色长余辉材料 物相 

分 类 号：O482.3[理学—固体物理]