低温自蔓延燃烧法制备YAG:Ce^(3+)荧光粉的研究

Study on the YAG:Ce^(3+)Phosphor Particles Prepared by Low Temperature Combustion

以Al(NO3)·9H2O、Y(NO3)·6H2O和Ce(NO3)3·6H2O为氧化剂,尿素为还原剂,采用低温燃烧-热处理法合成了YAG:Ce3+光致发光荧光粉。利用XRD、SEM、粒度分析仪和荧光分光光度计,研究了制备工艺条件对样品的物相组成、激发光谱、发射光谱以及相对发光亮度的影响。结果表明,公式Y3-xCexAl5O12中的x值取0.06,点火温度为650℃,燃烧产物经CO还原气氛1050℃保温2.5h煅烧处理,得到发光强度较大的单一YAG相YAG:Ce3+荧光粉。该荧光粉可被波长为468nm的蓝光激发,发射波长为525nm的黄光。

YAG：Ce^3＋ phosphor particles was prepared by low temperature combustion-heat treatment, process with Al（NO3）·9H2O, Y（NO3）·6H2O and Ce（NO3）3·6H2O as oxidant and urea as reducing agent. Influences of preparation processes on phase composition, excitation spectra, emission spectra and relative brightness of luminescence were studied with XRD, SEM, particle size analyzer and fluorescence spectrometer. When x=0.06 in formula Y3-xCexAl5O12 and ignition temperature of 650 ℃, after calcinations at 1050 ℃ for 2 h in CO reducing atmosphere, photoluminescence powders of YAG：Ce^3＋ with signal YAG phase were achieved, which can be excited by blue light with wavelength of 468 nm, and emit yellow light with wavelength of 525 nm,