YAG∶Ce荧光粉的柠檬酸-凝胶法合成与表征

Synthesis and Characterization of YAG∶Ce Phosphor by Citric Acid-gel Method

采用柠檬酸-凝胶法合成技术制备YAG∶Ce荧光粉,研究了Ce3+掺杂量、煅烧温度对荧光粉的光谱强度的影响。结果表明:当Ce3+掺杂量x≤0.07时,光谱强度随x增大而增强;当x>0.07时,光谱强度随x增大而减弱。随着煅烧温度的提高,粉体的结晶度不断提高,YAG∶Ce荧光粉的光谱相对强度逐渐增强。光谱的峰形和峰值不受温度和x的影响,主激发峰位于469nm,发射峰位于529nm。

YAG∶Ce phosphor was synthesized by citric acid-gel method.The effects of spectrum intensity of the concentration（x）of Ce ion and calcination temperatures were studied.The result indicates that spectrum intensity of phosphor increases with the concentration（x）of Ce ion when x is less than 0.07,the spectrum intensity of phosphor decreases with the increase of x when x is more than 0.07.The crystallinity of powders and spectrum intensity of YAG∶Ce phosphor increase with the increasing of calcination temperatures.It is also found that parameters such as temperatures and x do not affect the peak shape and peak locations,the main excitation peak locates at 469 nm and the main emission peak locates at 529 nm.