（Y，Gd，Eu）（PO4，BO3）红色荧光粉的制备及光谱研究

在固相反应的基础上，采用草酸根沉淀稀土粒子使其充分混合的前处理方法，合成出一种新型的硼磷酸钇钆铕荧光红粉。对样品进行了x射线衍射、红外和荧光光谱表征。与（Y，Gd，Eu）PO4相比，产物增加了与磷元素等摩尔量的硼。硼的掺入提高了发光强度，但没有改变样品的正磷酸盐单斜晶系结构。根据样品的红外光谱，发现其吸收峰与GdPO4的很相近，说明样品与GdPQ同构；同时分析了不同浓度Gd^3＋掺杂对样品发光强度的影响以及基质离子对Eu什的能量传递机理。通过对产物的分析发现其具有高的发光亮度及低的热猝灭效应，可作为一种优良的稀土三基色发光材料。最后将本实验所用方法与传统回相法对比，反应温度降低了100℃，发光强度提高了10％以上，且所得样品易粉碎、粒径小。

Synthesis of (Y, Gd,Eu) (PO4, BO3): Red Phosphor and Research about Its Spectra

The red fluorescence powder Gd, Eu co-doped yttrium borophosphate were prepared for the first time by the solid state reaction method with its precursor synthesized by co-precipitates of ammonium oxalate. The materials were characterized with X-ray diffraction, IR spectra and Fluorescence spectrum. Compared with （Y, Gd, Eu）PO4, the sample was impregnated with boric acid which is the same number of moles to phosphor element, the boron ele- ment improves the emission intensity of sample because BO3^3- help to impart energy to Eu3＋ , yet the phase is uniform to （Y, Gd, Eu）PO4. In the light of IR spectrum, it was found that the IR spectrum of sample was quite similar with GdPO4, so the sample has the same structure with GdPO4. Also, the optimum ratio of Gd3＋ and Eu 3＋ doped in the sample was ascertained by paralleling relative brightness of a series of samples. The article excused dependence of emission intensity of the product on Gd3＋ content. At the same time, the mechanism that PO4^3- and BO3- transfer energy to Eu3＋ was analyzed. All above reach a conclusion that （Y, Gd, Eu）（BO3, PO4） has better emission intensity and low temperature quenching effect, it will be as a new kind of tricolor fluorescence materials. Moreover, compared with traditional method, the modified method has better effect. The reaction temperature descends 100 ℃ and the luminous intensity increase above 10%, the product is easier to comminute and the particle diameter is much smaller.