采用溶胶凝胶-燃烧法合成Sr2-x-yCaxMgyAl2SiO7∶Eu2稀土长余辉发光材料,通过TG-DTA、XRD、SEM和荧光光谱分析等方法,研究了材料的结构、颗粒形貌和发光性能,并对Ca2+、Mg2+、Eu2+不同掺杂浓度下的发光性能进行了对比研究.结果表明,适量掺杂Ca2+、Mg2+、Eu2+后,基质的晶格结构并未发生变化,为Sr2Al2SiO7晶粒,粒径在1 um～4 um,其激发光谱是位于峰值340 nm～ 360 nm的宽带谱,发射光谱峰值位于460nm～480 nm.掺杂Ca2+、Mg2+后发光强度得到提高,镁元素的掺杂可引起发射波长向长波方向移动,而钙元素掺杂可引起发光强度的增大.影响材料发光性能的主要因素是钙,其次是铕,在实验条件下当Ca2+的掺杂量为0.2,Mg2+的掺杂量为0.1,Eu2+的掺杂量为0.04时发光强度为最大,其发射光谱峰值位于469 nm处,最大发射光谱强度达到了8500.
Sr2-x-y Cax Mgy Al2 SiO7 ∶ Eu2 + long afterglow phosphors were synthesized by SOL-GEL-combustion reduction method.The crystal structure morphology and the luminescent properties of the samples were characterized and measured by using the method of TG-DTA,XRD,SEM and fluorescence analysis,respectively.The effects of mole content of Ca2+ 、Mg2+ and Eu2 + on the luminescence properties of the Sr2-x-y Cax Mgy Al2 SiO7∶ Eu2 + sample were discussed.The results showed that the sample has a single Sr2Al2SiO7 phase and good crystalline state,and its crystalline grain size is about 1 ～4 um.The excitation spectra are located in 340 ～ 360 nm,emission spectra are located in 360 ～ 380 nm.Under the experimental condition,the luminous intensity reaches the maximum value when the Ca2 + doping amount is 0.2,Mg2 + doping amount is 0.1 and the Eu2 + doped amount is 0.04,the emission spectrum peak is located at 469 nm,and maximum emission spectrum intensity reached 8500.
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