摘要
采用传统高温固相法,以钨酸锶为基质材料,掺杂稀土Eu3+制备了可被紫色光有效激发的红色荧光粉Sr1-2xNaxWO4∶Eu3x+。通过测定与分析样品Sr1-2xNaxWO4∶Eu3x+的激发和发射光谱,发现激发光谱在395nm处吸收值最大,发射光谱的发射主峰位于613nm处,属于Eu3+的5D0→7F2特征跃迁。不同的Eu3+掺杂浓度下样品发光强度不同,当x=0.07时发光强度最佳。电荷补偿剂Na+对样品发光强度的影响很大,主要原因是Na+的加入会影响基质的晶体结构,当Na+的含量与Eu3+含量相同时样品发光强度最好,Na+含量增加到一定程度后基质结晶不完善,荧光体的发光强度急剧下降。
In this paper,groups of red-emitting phosphor Sr1-2xNaxWO4∶ Eu3＋x which can be excited by purple light were prepared by conventional solid state reaction.The excitation spectra and emission spectra were measured and analyzed.It is found the emission spectra lines have two peaks,the major one is around 613nm attributed to the 5D0→7F2 transition,and the excitation spectra have the biggest value when the wavelength is 395nm.Luminous intensity of the samples changes with concentrations of Eu3＋ and gets the best value when the x is 0.07.The content of Na＋ have a significant impact on the intensity of fluorescence spectra,the main reason is that the concentration of Na＋ can effect the crystal structure of samples and the intensity of fluorescence spectra was the best when the Na＋ concentration was equal to Eu3＋.
出处
《稀土》
EI
CAS
CSCD
北大核心
2012年第1期37-41,共5页
Chinese Rare Earths
基金
内蒙古科技大学创新基金(2009NC070)
关键词
SrWO4∶Eu3+
高温固相法
电荷补偿
SrWO4∶ Eu3＋； high temperature solid state reaction； charge compensator
