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稀土离子交换沸石荧光粉


    xxx

   xxx指导
LED必将照亮整个世界




 相比于传统白炽灯 LED
          绿色
          节能
          耐用
稀土离子因为其特殊的能级以及电荷转移带
结构使稀土发光材料成为绿色照明工程光电
子领域支柱材料。


纳米材料作为本世纪最有前途的新型材料在
光学材料、环保材料等领域有着广阔的应用
前景。
稀土材料价格昂贵

       难以普及

寻求一种光学性能良好且能满足日常及更深层应
用的发光材料,是科学家亟待解决目标之一
水浴离子交换法成本较低、工艺较简
单、对设备的要求不苛刻

沸石是稀土发光材料的良好基质
 储量丰富,价格低廉
 属于硅(铝)氧四面体多孔纳米材料
 具有极强的吸附性能、良好的催化性能
 可作为蓝、绿、红或白光材料的光学载体
沸石荧光粉制作步骤

EuCl3和沸     过滤 水洗     焙烧
石粉水浴离
子交换         烘干 冷却     处理
实验条件对比组

   水浴温度              焙烧温度
 室温离子交换600℃焙烧     80℃离子交换600℃焙烧
 70℃离子交换600℃焙烧    80℃离子交换700℃焙烧
 80℃离子交换600℃焙烧
水浴温度对荧光粉晶体结构和光学性能的影响
结论一           结论二
水浴离子交换之后沸石结   70℃水浴后粉末不发光
构并未改变         80℃水浴后粉末发光
焙烧温度对沸石荧光粉晶体结构和发光性能的影响一




              结论:
              600℃和700℃焙烧
              后沸石晶体结构并
              未破坏
焙烧温度对沸石荧光粉晶体结构和发光性能的影响二

               结论:焙烧使沸石晶粒尺寸变大
          X(200)      X(220)      X(222)      X(420)      X(622)     XAVG
沸石原料     58.9(nm)   50.30(nm)   53.70(nm)   60.2(nm)    60.9(nm)   56.80(nm)
室温下离子
  交换后  51.20(nm)    56.00(nm)   65.30(nm)   67.90(nm)   82.30(nm) 64.54(nm)
600℃焙烧
70℃水浴
       53.60(nm)    60.10(nm)   67.00(nm)   68.90(nm)   77.70(nm) 65.36(nm)
600℃焙烧
80℃水浴
       55.40(nm)    53.80(nm)   62.80(nm)   73.40(nm)   81.90(nm) 63.72(nm)
600℃焙烧
80℃水浴
       51.90(nm)    55.40(nm)   59.80(nm)   83.40(nm)   78.00(nm) 67.70(nm)
700℃焙烧
焙烧温度对沸石荧光粉晶体结构和发光性能的影响三

               结论:
               较低温度600℃焙烧后
               荧光粉发蓝光 和红光
               蓝光强
焙烧温度对沸石荧光粉晶体结构和发光性能的影响四




                结论:
                较低温度600℃焙烧
                后荧光粉发蓝光和
                黄光、橙光和红光
                红光最强
焙烧温度对沸石荧光粉晶体结构和发光性能的影响五




           结论
           焙烧温度越高发光强度
           越高,随着温度的升高
           荧光粉蓝光减弱,红光
           增强
总结
 在Eu离子交换沸石荧光粉的制备过程中,水浴温度对产物的荧
  光性能有重要的影响,研究结果表明最佳水浴温度为80℃。
 焙烧温度影响Eu离子交换沸石粉的发光波长和发光强度。经
600℃较低温度焙烧后的粉末主要发出蓝色荧光强度低;经过
700℃较高温度焙烧后的粉末主要发出红色荧光强度高。随着
焙烧温度的升高,Eu离子交换沸石粉发射的蓝光减弱,红光逐
渐增强。
 本文中制得的Eu3+交换沸石粉是一种多色发光荧光粉,且经过
  600℃和700℃焙烧后粉末仍保持沸石原有的晶体结构,未出
  现结构坍塌。
Thanks

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稀土离子交换沸石荧光粉