(Sr0.98-xMx)Al2O4(M=Ba,Ca)∶0.02Eu3+,yG(G=Li+,Na+,K+)红色荧光粉的制备及性能的研究

摘要

SrAl2O4∶Eu3+red phosphor was prepared by chemical co-precipitation method.X-ray diffraction(XRD)，photoluminescence measurement system (PL) were used to research the phosphors’ properties of adding auxiliary activator and changing the content of matrix elements.The results showed that Li+, Na+ and K+ used as the auxiliary activator，the uminescence intensity of Li+ was the best.Changing the amount of Li+ ，when the amount of Li+ was 0.04 mol，the intensity was the best.Changing the content of Sr2+in the powder , the emission peak of the phosphor was “blue shift” when Ba2+ was added and the emission peak of the phosphor was “red shift” when Ca2+was added.%采用化学共沉淀法制备出SrAl2O4∶Eu3+红色荧光粉,尝试向粉体中添加辅助激活剂(Li+、Na+、K+),改变粉体中基质元素相对比例,并对粉体进行XRD、荧光光谱分析.结果表明,样品中加入相同摩尔的Li+、Na+、K+辅助激活剂,掺入Li+的粉体发光强度最好.改变Li+的掺入量,当Li+的量为0.04 mol时,粉体发光强度最好.改变粉体中基质Sr2+的含量,当掺入Ba2+时,荧光粉发射峰出现"蓝移"现象;当掺入Ca2+时,荧光粉发射峰出现"红移"现象.