摘要
以SiO2,A lC l3.6H2O,Eu(NO3)3、氨水为原料,用溶胶凝胶法制备了前驱物通过碳热还原氮化法(CRN)获得了Eu2+掺杂S i3A l3O3N5(β-S ialon)荧光发光材料。应用X射线衍射(XRD)仪、扫描电子显微镜(SEM)、荧光分光光度计研究了Eu2+掺杂S i3A l3O3N5(-βS ialon)荧光粉物相、形貌及发光性能。在0.45 L.m in-1N2流条件下1380℃保温6 h得到较纯棒状形貌的S i3A l3O3N5(β-S ialon)相。Eu2+掺杂S i3A l3O3N5(β-S ialon)在紫外光部分具有强烈的吸收,其激发光谱的峰值波长为~280 nm,发射光谱的峰值波长为~419 nm,其对应于Eu2+离子4 f65d→4 f7跃迁。
Eu2＋ doped β-Sialon ultrafine powders were synthesized by carbothermal reduction-nitridation（CRN） technique.The precursors of β-Sialon was synthesized from SiO2,AlCl3 · 6H2O,Eu（NO3）3,ammonia solution and carbon powders by the sol-gel method.The phase,morphology and luminescence properties of Eu2＋ doped β-Sialon phosphor were studied by X-ray diffractometer（XRD）,scanning electron microscopy（SEM）,fluorescent spectrophotometer.The pure rod-like Eu2＋ doped β-Sialon powders could be obtained at processing temperature of 1380 ℃ for a holding time of 6 h.Eu2＋ doped β-Sialon phosphor had high adsorption in the UV spectral region.One band was observed in the emission spectra centered at about 419 nm exited by 280 nm.The excitation bands located at about 280 nm were observed in the excitation spectrum with monitored at emission wavelength of ~419 nm,which belonged to the 4f65d→4f7 transition of Eu2＋.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2011年第3期383-386,共4页
Journal of the Chinese Society of Rare Earths
基金
国家自然科学基金(20671035/B0105)资助
