弱碱溶液后处理对固相合成铈掺杂钇铝石榴石荧光粉发光性能的改进

为改善高温固相反应制备的铈掺杂钇铝石榴（YAG∶Ce3+）黄光荧光粉的发光性能，分别采用浓氨水、N,N-二甲基乙酰胺(DMAC)、三乙醇胺、聚丙烯酰胺和六次甲基四胺等的水溶液对其进行浸泡处理，比较了处理剂浓度、用量和处理剂类型对荧光粉发光强度、荧光粉温度、猝灭性能和形貌的影响，确定了以30%氨水在50 ℃浸泡50 min为优化的处理工艺，YAG∶Ce3+荧光粉发光强度比处理前约提高9.5%，荧光粉分散程度也得到改善，处理后粒径分布更加均匀。

Improved Luminescence Properties of Cerium-doped Yttrium Aluminum Garnet Phosphor Through Post-processing

In this work, a series of post-processing experiments was conducted on cerium-doped yttrium aluminum garnet（YAG∶Ce3+） yellow phosphor in order to improve their luminescent properties. Several kinds of alkali, e.g., ammonia, N,N-dimethylacetamide(DMAC), triethanolamine and polyacrylamide, were selected as post-processing reagents. Effect of the type, the concentration of the post-processing reagent, and the soaking on the PL intensity of YAG∶Ce3+ were investigated in details. The optimum condition is to soak the phosphor in a 30% ammonia solution for 50 min at 50 ℃. The PL intensity of the phosphor increased about 9.5%, and the agglomeration among particles decreased after post-process.