中文摘要：

采用沉淀法，以不同配比的NH4HCO3＋NH3·H2O作为混合沉淀剂制备了YAG：Ce荧光粉。利用激发光谱、发射光谱、XRD和TEM对其光学特性和形貌进行了研究。结果表明，使用混合沉淀剂可提高YAG：Ce荧光粉的发光强度，当混合沉淀剂为1mol／L碳酸氢铵＋4mol／L氨水时，荧光粉的发光强度最大，样品的生成物为纯YAG相粉体，其粒径分布均匀，分散性良好，呈球形，颗粒大小为1μm左右。

英文摘要：

The mixed precipitant of NH4 HCO3＋NHa · H2O with different mixture ratio is used to synthesize YAG ： Ce phosphor by precipitation method. The optical properties and morphology are characterized by excitation spectrum, emission spectrum, X-ray diffraction（XRD） and transmission electron microscope（TEM）. The results show that the luminescent intensity of YAG ： Ce phosphor prepared by mixed precipitant is improved. The maximum luminescent intensity of the sample is prepared by mixed precipitant with lmol/L ammonium acid carbonate and 4mol/L ammonia water. This sample is pure phase YAG powder with homogeneous particle size of about 1μm and good dispersibility.