用化学共沉淀法一次煅烧工艺合成了 (Y1-x-y,Gdy)2O3∶xEu3+(x=0.06~0.10，y=0，0.20~0.25)系列红色荧光粉。用XRD、SEM和荧光分光光度计，对试样的晶体结构、表面形貌及发光性能进行表征。研究了Eu3+、Gd3+的掺杂浓度、表面活性剂的加入、煅烧温度对样品性能的影响。结果表明: 样品为立方晶系; Gd3+的加入会使基体晶格发生畸变，晶胞参数增加，起到改善样品色纯度和发光效率的作用; 最佳煅烧温度为900 ℃，比传统的高温固相法低500 ℃左右; 所合成荧光粉的粒度主要分布在300~400 nm，结构比较松散; 当x=0.08，y=0.23时，最大发射峰(λem=613 nm)强度最大。所合成的Y1-x-y,Gdy)2O3∶xEu3+荧光粉是一种性能较好的PDP用红色荧光粉。

A series of (Y1-x-y,Gdy)2O3∶xEu3+(x=0.06~0.10，y=0，0.20~0.25) red phosphors have been synthesized by co-precipitation synthesis. The crystal structure, surface morphology and spectral characteristics of the samples were investigated by X-ray diffraction (XRD), SEM and fluorescence spectrophotometer. The effects of doping density of Eu3+and Gd3+, the calcining temperature and the addition of surfactant on the characteristics of luminescence have also been investigated. It is found that the synthesized crystalline powders are cubic system. The introduction of Gd3+ would make the crystal structure distorted and aggrandize the cell parameters, which may improve samples color purity and luminous efficiency. The completely crystallized phosphors were obtained at 900 ℃, which is nearly 500 ℃ lower than the temperature of solid-state method. The particle size of the samples is loose, and their sizes are ranging from 300 to 400 nm. The optimum emission intensity of 613 nm is obtained when the x=0.08, y=0.23. Therefore, it suggests that the sample phosphors have a good spectral characteristics and can be used as PDP red phosphors.