摘要
以Na2SO4-K2SO4为熔盐,采用水热均匀沉淀-熔盐煅烧法制备了YAG:Ce3+黄色荧光粉,应用XRD、SEM、荧光分光光度计等测试手段研究了熔盐辅助煅烧对粉体结构、形貌和发光性能的影响。结果表明,以尿素为沉淀剂,采用水热均匀沉淀法制备的前驱体,经Na2SO4-K2SO4熔盐辅助煅烧,900℃时已完全转变为YAG相,与固相法相比,YAG相的完全转变温度降低了600℃,与前躯体直接煅烧相比,YAG相的完全转变温度降低了300℃,荧光粉的发光强度提高了2.4倍。
The cerium-doped yttrium aluminum garnet（YAG ： Ce^3＋ ） phosphors are synthesized via a hydrothermal homogeneous precipitation-molten salt method（HHPMS）. The powder structure, morphology and photoluminescence are characterized by XRD, SEM and fluorescence spectrophotometer, respectively. The results indicate that the YAG = Ce^3＋ phosphor can be prepared using urea as precipitator and Na2 SO4-K2SO4 as molten salts. Compared with the solid state reaction method and hydrothermal homogeneous precipitation-direct calcination method（HHPDC）, the prepared temperature of YAG ： Ce^3＋ phosphor with the present method can be decreased about 600℃ and 300℃, respectively. And the luminescent intensity of as-prepared phosphor can be increased 2. 4 times than the phosphor pre-pared by HHPDC method.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2009年第18期18-21,共4页
Materials Reports
基金
教育部"新世纪优秀人才计划"专项资金(NCET-06-0758)
广西自然基金项目(桂科自0542011)
关键词
熔盐
YAG:Ce^3+
发光
水热均匀沉淀
molten salt, YAG ： Ce^3＋ , luminescence, hydrothermal homogeneous precipitation
