报道了一种采用氨水和碳酸氢铵的混合溶液作为复合沉淀剂来制备(Y,Gd)2O3:Eu发光粉体的新工艺.采用热分析(TG-DTA)、红外光谱(FT-IR)、X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)等手段对粉体制备过程中的物理化学变化进行了研究.通过X射线激发的发射光谱研究了Eu掺杂浓度和煅烧温度对(Y,Gd)2O3:Eu粉体发光性能的影响.结果表明采用复合沉淀法制备工艺,经过850℃煅烧2h,可以得到晶粒尺寸为50nm左右,且基本无团聚的(Y,Gd)2O3:Eu粉体,比表面积为23m2/g,其X射线激发的发光强度较草酸盐沉淀法所得到的相同组分的粉体大大增强.
(Y,Gd)2O3:Eu phosphors were prepared by the complex precipitation processing using the mixture of ammonium water
and ammonium hydrogen carbonate as complex precipitant. TG-DSC, FT-IR, XRD, SEM, TEM were used to characterize the as prepared
phosphors. The Eu2O3 concentration and calcining temperature have distinctly influence on the X-ray excited luminescence of the as prepared
powders. The resulted (Y,Gd)2O3:Eu powder calcined at 850℃ for 2h has an average particle size of 50nm. The specific surface area
of the weakly agglomerate powder is about 23m2/g. Its X-ray excited luminescence is much stronger than that of the powder prepared by oxalate
precipitation processing.
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