中文摘要：

探讨了影响生成纯相YAG纳米粉体的各种因素，并通过优化工艺参数，得到了纯相并具有单分散、无团聚、颗粒尺寸分布窄且近似球形特点的YAG纳米粉体。实验中，配制不同浓度的NH4HCO3水溶液作为沉淀剂，配制不同浓度的Y（NO3）3和NH4Al（SO4）2混合水溶液作为母液，在不同的的温度下．采用不同的滴定速度，得到不同的前驱体，前驱体在900℃以上的温度焙烧2h即可获得不同的粉体。主要采用X射线衍射（XRD）对这些粉体进行了物相分析，同时结合红外光谱法（FT-IR）对部分前驱体进行了定性分析，用透射电子显微镜（TEM）对纯相粉体进行了形貌观察。结果表明，在共沉淀过程中，混合溶液和沉淀剂的浓度直接决定了是否生成YAG为主相的粉体，环境温度和滴定速度则对是否生成纯相粉体有较大的影响。

英文摘要：

In this paper, the effect factors on pure phase of YAG nano-sized powder by co-precipitation method have been investigated,and the pure phase powder was obtained by using optimal technique parameters. In experiment,with the different concentration of ammonium hydrogen carbonate as precipitant, with the different concentration of mixed solution of aluminum nitrate and yttrium nitrate as mother solution, with different dripping speed, under the different temperatures, the different precursors were acquired. Then the precursors were calcined at above 900℃ for 2h,and the different powders were gotten. The phase of these powders was mainly measured by means of XRD. At one time,a part of precursors were qualitatively analyzed by FI-IR. The appearance of pure phase powder was observed by TEM. The results show that, whether generating the major phase powder of YAG, the concentration of mixed solution and precipitant solution are dominant factors. And environmental temperature and dripping speed effect on the phase purity of powder.