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中文摘要：
本文采用Al（NO3）3·9H2O和Y（NO3），·6H2O为母盐，碳酸氢铵为沉淀剂，利用共沉淀法制备YAG（Y3Al5O12）纳米粉体。利用XRD、SEM对YAG前驱体及煅烧纳米粉体进行了表征，并分析了母盐溶液的浓度、母盐溶液的滴加速度以及有机溶剂的种类对制备YAG纳米粉体的影响。结果表明：母盐溶液的浓度、滴加速度及有机溶剂种类对前驱体和煅烧粉体的分散性、组成及形貌有显著的影响。当母盐溶液浓度比较低时（[Y^3＋]=0．08mol／L，[Al^3＋]=0．13mol／L），得到YAG纳米粉体的分散性较好，加入少量乙醇（乙醇与母盐溶液体积比为1：5）更易获得纯相YAG粉体，快速加入母盐溶液比慢速滴入更易获得纯相YAG粉体。实验证实所制备的YAG粉体能够烧结出透明陶瓷，证明通过系统地控制上述3个因素可以得到具有良好烧结性的YAG纳米粉体。
英文摘要：
Yttrium aluminum garnet （YAG） nano-powders was synthesized by the co-precipitation method through dropping AI（NO3 ）3·9H2O and Y （NO3 ）3·6H2O solution into ammonium hydrogen carbonate solution. Three factors that affect the synthesis of YAG nano-powders, including the mother salt concentration, the species of organic solvents, and the dropping speeds of the mother salts solution, were analyzed and discussed. The precursors and the YAG nano-powders were characterized by XRD and SEM. The results show that the dispersion, the composition and the morphology of the precursors and the YAG nano-powders are affected remarkably by these factors. The YAG nano-powders with excellent dispersion can be obtained when the mother salt concentration （[Y^3＋ ] = 0.08 mol/L, [ Al^3＋ ] =0. 13 mol/L） is relatively low. In addition, pure YAG nano-powders can be obtained more easily by adding some ethanol （ the volume proportion of the ethanol and the mother salts solution is 1： 5 ） and by high speed dropping the mother salts solution. Transparent ceramic pellet is obtained by a systematic control of the above mentioned factors, which demonstrates that the YAG nano-powders obtained have excellent sinterability.
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