采用传统高温固相法制备了Y2.94Al5-2x(MgSi)xO12: 0.06 Ce黄色荧光粉，利用X射线衍射仪、荧光光谱仪对其结构和光学性能进行了研究，探讨了YAGCe荧光粉中发射光谱和激发光谱随着(Mg-Si)含量的变化关系以及Ce3+外层电子在该荧光粉中的能级状态。结果表明，该荧光粉为石榴石单晶相结构，无其它杂相，在500～650 nm范围具有很强的黄光发射，两个主要激发峰位置分别位于340 nm和460 nm附近。随着(Mg-Si)含量的增加，发射光谱发生了明显的红移现象(532 nm→554 nm)，而激发光谱中的近紫外激发峰向短波方向移动，蓝光激发峰向长波方向移动，同时，Ce3+周围的晶体场强度得到了加强，使Ce3+的外层电子5d1激发态能级获得了加宽。

Y2.94Al5-2x(MgSi)xO120.06 Ce yellow-phosphors are synthesized by the high temperature solid-state method. The structure and optical properties of samples are characterized by application of powder X-ray diffraction (XRD) and photoluminescence spectroscopy. Moreover, the variation of photoluminescence (PL) and photoluminescence excitation (PLE) spectra are studied as a function of (Mg-Si) concentration as well as the energy level of outer shell electron of Ce3+. XRD analysis reveals that all of the synthesized phosphors are nearly single-phase garnet and no impurity phases are presented. Phosphors show broad yellow emission band in the range of 500～650 nm and two maximum excitation peaks are located at 340 nm and 460 nm. With the increase of (Mg-Si) concentration, the PL spectra presents distinct red-shift. In the PLE spectra, the near ultraviolet excitation band shows blue-shift and the blue excitation band shows red-shift, respectively. Simultaneously, the crystal field strength around Ce3+ is enhanced and the energy level of outer shell electron (5d1) of Ce3+ is broadened.