The Characteristics of YAG:Ce Phosphor Powder Prepared Using a NO3−-Malonic Acid-NH4NO3-NH3·H2O System

Bulletin of the Korean chemical society

Jin An Jeong¹  Yoo Young Kim¹  Hong Gun Kim¹  Kyunghwan Park¹  Dong Hoon Lee¹ 

关键词: YAG:Ce phosphor;    Combustion method;    Malonic acid;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

Ce-doped Y3Al5O12 (YAG:Ce) phosphor powder was prepared using a NO3 −-malonic acid-NH4NO3-NH3·H2O system. The YAG:Ce precursor was ignited at 240 oC and the resulting powder contained YAG:Ce crystallites (42%) - active in the visible region at 460 nm - amorphous particles (53%) - inactive at visible wavelengths - and less than 3% oxide (3%) crystallite impurities. The impurities transformed to acitive YAG:Ce crystallites at above 800 oC. At above 1000 oC, the amorphous phase became YAG phase and isolated Ce2O crystallites emerged. The powder particles comprised < 4 μm secondary aggregates of 20 nm primary particles. The thermal dusting of the secondary particles coincided with the aggregation of the secondary particles at above 900 oC.

【 授权许可】

Unknown