熔炼结合常压退火制备Ca-Al-Si-N:Eu荧光粉的研究

The Study of Melting Preparation Combined with Atmospheric Annealing for Ca-Al-Si-N:Eu Phosphors

采用快速熔炼合金法,结合高温常压退火制备了Ca1-xEuxAlSiN3(x=0.02,0.04,0.06,0.08,0.1)系列氮化物红色荧光粉,通过调节稀土Eu的不同掺杂量,研究荧光粉的物相结构及发光性能.室温XRD表明,该系列红色荧光粉具有CaAlSiN3物相结构.通过研究结构、形貌、能谱及光谱发现,随着Eu浓度的增加,荧光粉中Eu3+含量增加,物相结构表明Eu3+多以氧化铕的形式存在.发光光谱也表明,随着Eu浓度的增加,光谱发光峰位先红移再蓝移,同时荧光光谱也是先增大后降低.经初步分析认为,这是由于合金化过程中Eu被不同程度地氧化为Eu2O3所致.

Adopt the rapid melting alloy method combined with high temperature and constant pres-sure annealling method preparation of Ca1 -x Eux AlSiN3 （x =0.02,0.04,0.06,0.08,0.1 ）series of nitrides red phosphors,and by adjusting the different doping of rare earth Eu to study the phase structure and lumi-nescence properties of phosphor.Room temperature XRD Showed that this series of red phosphors have CaAlSiN3 phase structure,by studying the structure,surface profile,Energy spectrum and Spectrum can be found that with the increase of the concentration of Eu in phosphor,the Eu^3 ＋ increases,the phase structure indicates shows that Eu^3 ＋ existed in a europium oxide form.Fluorescence spectrum also shows that with the increase of concentration of Eu fluorescence peak position first red shift then blue shift and at the same time,the fluorescence spectrum has reduced after the first increase phenomenon.A preliminary analysis of these are due to in the process of alloying,the Eu has different degree of oxidation.