摘要
对Pechini法进行了改进。使用硝酸化合物作为反应物,柠檬酸氨为螯合剂,聚丙烯酰胺为聚合剂,N,N-亚甲基双丙烯酰胺为网络剂,溶于丙酮的偶氮二异丁腈为引发剂,制备了白光用YAG荧光粉。使用差热分析、XRD、SEM对YAG荧光粉进行了分析。相比于其他方法,用改进的Pechini法制备得到的YAG荧光粉结晶完整,物相较纯,形成温度较低(860℃),颗粒大小合适。将所制备的荧光粉涂覆在LED上进行了测试,结果表明其发光效率为目前商业荧光粉的90.1%。
An improved Pechini method was applied to synthesize YAG phosphor. Yttrium nitrate, cerium nitrate and aluminium nitrate were used as raw materials with ammonium citrate as comple- xing reagent and polyacrylamide as polymerizer. The YAG phosphor was analyzed by TG-DSC, XRD and SEM. The results showed that the phosphors synthesized by improved Pechini method had better crystallinity at lower calcining temperature compared with commercial advanced products. The illu- mination performance of pc-LEDs coated with the synthesized YAG phosphor were measured. The results show that the luminous efficiency of the synthesized YAG phosphor is 90.1% of the commer- cial advanced phosphor.
出处
《发光学报》
EI
CAS
CSCD
北大核心
2013年第6期698-701,共4页
Chinese Journal of Luminescence
