【摘要】 利用溶液燃烧法成功制备了Eu2+激活的BaMgAl10O17:Eu2+(BAM)蓝色荧光粉,着重研究了助熔剂H3BO3对BAM发光性能影响的机理。结果表明:助熔剂有利于产物的晶化,所获得的BAM颗粒形貌更加规整,呈球状且尺寸分布更加均匀。H3BO3的最佳添加质量为1.0%,可使BAM的发光强度提高30%以上。助熔剂提高BAM发光性能的机理为:液相的存在改变了粉末之间的接触状态,降低了分子扩散的传质阻力,有利于激活剂稀土离子充分进入BAM晶格而形成更多的发光中心,从而提高产物的发光性能。更多还原

【Abstract】 The Eu 2+ activated blue emitting BaMgAl10O17:Eu2+(BAM)phosphor for plasma display panel application was success- fully prepared by the solution combustion method.The mechanism of H3BO3 as flux for the luminescence properties of the BAM phosphor was investigated.The results show that the use of H3BO3 as flux can help to crystallize the phosphor,and enhances the in- tensities of the excitation and emission spectra of the BAM.The optimum content of H3BO3 is about 1.0%in mass which increases the relative emission intensity of the BAM more than 30%.The flux mechanism for the improvement of the photoluminescence cha- racteristics of the BAM is that the H3BO3 melts at a low temperature to form liquid phase,which accelerates the velocity of the chemical reaction,prompting the Eu 2+ to enter the BAM lattice through grain boundary diffusion and improving the morphology of particles,endowing them with round edges,smooth surfaces and nearly spherical shapes.更多还原