煅烧工艺对YAG:Ce^(3+)荧光粉的显微形貌和发光性能的影响  

Effect of Calcining Process on Crystallization,Morphology and Luminescent Properties of YAG:Ce^(3+) Phosphor Powder Prepared by Polyacrylamide Gel Method

作　　者：许志伟[1] 严星煌[1] 于瑞敏[1] 蔡靖[1] 罗学涛[1] 

机构地区：[1]厦门大学,福建厦门361005

出　　处：《稀有金属材料与工程》2009年第A01期173-177,共5页Rare Metal Materials and Engineering

摘　　要：利用高分子网络凝胶法制备YAG:Ce3+荧光粉,研究了煅烧温度、煅烧时间等对荧光粉的晶化过程、显微形貌及发光性能的影响。结果表明:高分子网络凝胶法可在1000℃煅烧温度下获得晶型完整的YAG:Ce3+荧光粉;随着煅烧温度的升高晶粒尺寸增大,1000℃时平均粒径为50nm,在1300℃时平均粒径为120nm。随温度的升高和粒径的长大其相对发光强度也逐渐提高;随着保温时间的延长,晶粒变化不大,但发光强度逐渐提高,在400min时由于Ce离子氧化而发生蓝移。Ce-doped YAG phosphor powders were prepared by the polyacrylamide gel method. Effects of calcined temperature and holding time on crystallization and powder morphology as well as luminescent properties of YAG：Ce^3＋ phosphor powders were studied. The results show that the pure Ce-doped YAG phase was obtained by calcining at 1000 ℃. The grain size grew and the particle agglomeration occurred with the calcining temperature rising up and holding time prolonging; the grain size is about 50 nm for samples calcined at 1000 ℃, and it is about 120 nm for samples calcined at 1300 ℃. The emission intensity increases with the calcining temperature rising up. With the extension of the holding time, the particle has a little change, and the emission intensity gradually increases. At the holding time of 400 rain, there is a shift of peaks to shorter wavelengths compared with 300 min.

关 键 词：YAG:Ce3+荧光粉 高分子网络凝胶法 煅烧 显微形貌 发光性能 

分 类 号：O482.31[理学—固体物理]