【摘要】 采用溶胶 -凝胶法在低温、还原气氛下制备了长余辉发光材料SrAl2 O4∶Eu2 + ,Dy3 + .用X射线粉晶衍射对其进行了物相鉴定 ,表明在 10 5 0℃已经得到纯相的SrAl2 O4产物 ,115 0～ 14 0 0℃物相没有改变 ,仍是SrAl2 O4相 .研究了灼烧工艺、铕和锶的比值、硼酸的加入量、激活剂铕和镝的比值、基质元素铝和锶的比值等条件对SrAl2 O4∶Eu2 + ,Dy3 + 长余辉发光材料的相对发光强度的影响 .结果表明 :采用H2 作还原气氛 ,灼烧温度为 12 0 0℃ ,恒温 2h ,然后随炉自然降温的生产工艺 ,可制备出发光性能优良的长余辉发光材料 .更多还原

【Abstract】 Sol-gel synthesis technique （SST） has been used to prepare SrAl₂O₄∶Eu²⁺,Dy³⁺. The XRD shows that the production prepared at 1 050 ℃ is pure-phase SrAl₂O₄∶Eu²⁺,Dy³⁺, and the phase will not change subjected to the temperature of 1 150 ℃-1 400 ℃. Effects of such factors as the temperature in the sintering process, different proportions of Eu/Sr, different additions of boracic acid, different proportions of Eu/Dy and different proportions of Al/Sr on the relative luminescent height have been studied. The research shows that under the condition of taking hydrogen as reductant, taking 1 200 ℃ as sintering temperature, keeping constant temperature for 2 hours and naturally lowering the temperature, high-quality phosphor products can be produced.更多还原