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采用化学共沉淀法一次煅烧工艺制备BaAl2Si2O8:Eu2+荧光粉。用X射线衍射仪、荧光分光光度计和扫描电镜等对BaAl2Si2O8:Eu2+荧光粉的相结构、发光性能、形貌进行表征。结果表明,化学共沉淀法合成了单相的BaAl2Si2O8:Eu2+,且粒度小,分布均匀,呈类球形。在320nm激发下,其发射主峰位于465nm附近,当Eu2+的掺杂浓度为3.5%,发光强度达到最大值,猝灭浓度有所提高,这主要是由于纳米微粒边界对能量共振传递的阻断和猝灭中心在纳米晶内分布的涨落性引起的。
BaAl2Si2O8: Eu2 + phosphor was prepared by chemical coprecipitation method. The phase structure, luminescent properties and morphology of BaAl2Si2O8: Eu2 + phosphor were characterized by X-ray diffraction, fluorescence spectrophotometer and scanning electron microscope. The results show that single-phase BaAl2Si2O8: Eu2 + is synthesized by chemical coprecipitation, and has the characteristics of small size, uniform distribution and spherical shape. At 320 nm excitation, the main emission peak is near 465 nm. When the doping concentration of Eu2 + is 3.5%, the luminescence intensity reaches the maximum and the quenching concentration increases. This is mainly due to the blocking of the energy resonance transfer by the nanoparticle boundary and The quenching center is caused by the fluctuation of the distribution in nanocrystals.