采用高温固相法制备了Lu3Ga5O12:Tb3+体系荧光粉，研究了Y3+、Gd3+和Al3+离子分别取代Lu3+和Ga3+离子后对荧光粉晶体结构和发光性能的影响。结果表明，Lu3Ga5O12∶Tb3+具有石榴石结构，激发光谱由A、B 两个宽激发带及一些窄谱峰构成，分别归属于Tb3+的4f8→4f75d1 和4f8→4f8 的电子跃迁。紫外激发下的发射光谱对应于Tb3+ 5D4→7FJ 和5D3→7FJ跃迁。对于(Lu,Y)3Ga5O12∶Tb3+ 体系，随着Y3+浓度的增加，晶格膨胀，A、B 宽带红移，带间距缩小，激发与发射强度提高。对于(Lu,Gd)3Ga5O12∶Tb3+ 体系，当Gd3+浓度低于0.75 时，随着Gd3+浓度的增加,荧光粉性能变化与引入Y3+时情况相似，并更为显著；实验中观察到Gd3+→Tb3+能量传递现象。对于Lu3(Ga,Al)5O12∶Tb3+ 体系，随着Al3+含量的增加，晶格收缩，A、B 宽带红移，带间距扩大，激发与发射强度提高。阳离子的半径差异及其引起的Tb3+晶场环境的变化是影响荧光粉性能的主要原因。

Lu3Ga5O12∶Tb3+ phosphors is synthesized by the high temperature solid state reaction, and the effects of substitution of Y3+/Gd3+ and Al3+ for Lu3+and Al3+ respectively on the crystal structures and luminescent properties of the phosphors are investigated. Lu3Ga5O12∶Tb3+ shows pure garnet phase, and the excitation spectrum contains two broad bands called A-and B-bands and some lines assigned to the transitions of Tb3+4f8→4f75d1 and 4f8→4f8, respectively. Under ultraviolet (UV) light, the emission spectrum consists of Tb3 + characteristic emission lines corresponding to 5D4→7FJ and 5D3→7FJ transitions. For (Lu, Y)3Ga5O12∶Tb3+system, with the increase of Y3+, the crystal structure remains with a slight lattice expansion, the red-shift of A-and B-bands occurs, the interval between the two bands decreases, and the intensity of excitation and emission enhances. Similar but more obvious changes occurs in (Lu,Gd)3Ga5O12∶Tb3+system in a range of Gd3+ concentration from 0 to 0.75 with respect to Lu3+. The energy transfer of Gd3+→Tb3+ is observed. For Lu3(Ga,Al)5O12∶Tb3+system, with the increase of Al3+, the garnet phase structure remains with a lattice shrinkage, the red- shift of A- and B- bands occurs, the interval between the two bands increases, and the intensity of excitation and emission improves. The difference in ions radii between the cations, and the change of the crystal field environment Tb3 + caused by cations substitution are the main factors of affecting the properties of the phosphors.