核壳结构的Al2O3/YAG:Ce荧光粉的喷雾干燥法制备及形成机理

稀有金属材料与工程, 2014, 43(10): 2311-2315.

核壳结构的Al2O3/YAG:Ce荧光粉的喷雾干燥法制备及形成机理

韩涛 ^1, , 彭玲玲 ^2, , 曹仕秀 ^3, , 朱达川 ^4, , 涂铭旌 ^5, , 张进 ^6,

1.重庆文理学院重庆市高校微纳米材料工程技术重点实验室,重庆402160;四川大学,四川成都610065

2.重庆文理学院重庆市高校微纳米材料工程技术重点实验室,重庆402160

3.重庆文理学院重庆市高校微纳米材料工程技术重点实验室,重庆402160

4.四川大学,四川成都610065

5.重庆文理学院重庆市高校微纳米材料工程技术重点实验室,重庆402160;四川大学,四川成都610065

6.重庆文理学院重庆市高校微纳米材料工程技术重点实验室,重庆402160

基金项目: Natural Science Foundation Project of CQ,CSTC (cstc2012jjA50039,cstc2011jjB50012)

关键词：荧光粉 , 核壳结构 , 机理 , 喷雾干燥法

Preparation of a Core-Shell Structured Al2O3/YAG:Ce Phosphor by a Spray Drying Method and Formation Mechanism

Keywords： phosphors , core-shell structure , mechanism , spray drying method

采用喷雾干燥法制备核壳结构的Al2O3/YAG:Ce荧光粉,所得样品为立方Y3Al5O12结构,球形颗粒的粒径为1～8 μm,显示出比共沉淀法高的内部量子效率.核壳结构的Al2O3/YAG:Ce荧光粉的形成机理为,起始悬浮液包含微米级的A12O3和Y3+、Al3+、Ce3+等形成的聚阳离子,经过雾化形成小液滴,在溶剂挥发过程中,由于聚阳离子比微米级的A12O3的迁移速度大,在颗粒间的毛细管力的作用下,自组装成为聚阳离子包裹微米级的A12O3的核壳型结构,在850～1250℃时焙烧2h,就得到了核壳型的荧光粉.

参考文献

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