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将微波均相沉淀与喷雾干燥相结合,并添加助熔剂辅助煅烧制备出单相YAG:Ce~(3+)荧光粉体,研究了微波均相沉淀与喷雾干燥的共同作用对煅烧条件和YAG:Ce~(3+)荧光粉颗粒形貌、分散性和荧光性能的影响。结果表明,这种单相YAG:Ce~(3+)荧光粉体具有良好分散性,平均粒径为2μm;将微波均相沉淀与喷雾干燥相结合能制备出分散性好的球形YAG前驱体颗粒;添加NaF助熔剂使煅烧温度降低至1150℃,并得到纯YAG晶相;随着NaF添加量的增加荧光粉结晶度提高、发光强度增强、发射光谱蓝移;NaF添加量(质量分数)为6%时荧光粉的荧光强度最高,且与单一助熔剂比较,H_3BO_3 NaF混合助熔剂能更好的改善YAC:Ce~(3+)的荧光性能。
Combining microwave homogeneous precipitation with spray drying, and adding flux to assist calcination to prepare single-phase YAG: Ce ~ (3+) phosphor, the effects of microwave homogeneous precipitation and spray drying on calcination conditions and YAG : Ce ~ (3+) Phosphor Particles Morphology, Dispersivity and Fluorescence Properties. The results show that the single-phase YAG: Ce ~ (3+) phosphor has good dispersibility and the average particle size is 2μm. The spherical YAG precursor with good dispersibility can be prepared by combining microwave homogeneous precipitation and spray drying The addition of NaF flux reduced the calcination temperature to 1150 ℃, and the pure YAG crystal phase was obtained. With the increase of NaF content, the crystallinity of the phosphor increased, the luminescence intensity increased and the emission spectrum shifted blue. The addition of NaF (mass fraction) The fluorescence intensity of phosphor is the highest at 6%. Compared with single flux, H_3BO_3 NaF flux can better improve the fluorescence of YAC: Ce ~ (3+).