采用溶胶-凝胶法合成了Y3Mg2AlSi2O12∶Ce3+荧光粉。用X射线粉晶衍射(XRD)仪对其进行了物相分析，用电子扫描电镜(SEM)观察了该荧光粉的形貌，同时测定了激发光谱及发射光谱。结果表明，Y3Mg2AlSi2O12∶Ce3+的晶体结构与Y3Al5O12(钇铝石榴石)一致，形貌也表现出等轴粒状的特点。发射谱为峰值位于580 nm处的宽带发射，是Ce3+的 4f65d1-4f7特征跃迁发射。激发谱表现为340 nm和468 nm的双峰带，可以被蓝光有效的激发。Ce3+的浓度对发光强度有明显的影响，当Ce3+的摩尔分数为0.06时，发光强度最大。最后考察了成分取代而导致的Y3Mg2AlSi2O12∶Ce3+的物相转变和对发光性能的影响。

The Y3Mg2AlSi2O12∶Ce3+ phosphor was synthesized by sol-gel method. Phase analysis of prepared samples was carried out by X-ray diffraction. The morphology was observed by scanning electron microscopy (SEM), and the excitation and emission spectra were determined. The results show that the crystal structure of synthesized Y3Mg2AlSi2O12 is consistent with Y3Al5O12(Yttrium aluminum garnet), and morphology displays the equiaxial granular characteristics. The emission band of the phosphor is wide, and the peak is near 580 nm, corresponding to the 4f65d1-4f7 typical transitions of Ce3+ and the excitation spectrum has two peaks at 340 nm and 468 nm, indicating that the phosphor can be excited effectively by blue light. The spectral intensity is significantly influenced by the doping concentration of Ce3+, and reaches a maximum value at the doping mole fraction of 6%. Moreover, composition replacement results in phase transformations of Y3Mg2AlSi2O12∶Ce3+ and influences luminous property.