中文摘要：

采用共沉淀方法，以Nd2O3、Y2O3和AI（NOa）3·9H2O为起始原料，尿素为沉淀剂，制备Nd：YAG纳米粉体，粉体经XRD、TG—DTA、FESEM以及激光散射等测试手段对其结构和形貌进行测试研究。XRD表明，前驱体在900℃煅烧3h出现了YAG相和YAM中间相，在1000℃及其以上煅烧3h后已完全转变成YAG相，且随着煅烧温度升高，衍射峰逐步增强，900℃-1200℃煅烧的Nd：YAG晶格常数值从1．2012nm变化到1．1994nm，颗粒度从31nm变化到96nm，激光粒度仪也给出了类似的变化趋势。TG—DTA结果表明当前驱体加热到1200℃时，粉体总重量损失约为43％。对前驱体进行了水洗和乙醇洗两种洗涤，比较发现乙醇洗涤更有利于Nd：YAG纳米粉体的分散，这些实验结果可为制备优良YAG透明陶瓷粉体提供参考。

英文摘要：

Nd：YAG nanoscaled powders were prepared by the co-precipitation method with Nd2O3, Y2O3 and Al（NO3）3·9H2O as the starting materials and CO（NH2）2 as the precipitator. The structure and morphology of the powders were investigated by XRD, TG-DTA, FESEM and laser particle analyzer. XRD patterns show that YAG phase and intermediate phase YAM were detected in the sample from the precursor calcined at 900℃ for 3 hours, the precursor completely transformed to YAG phase when it was calcined at 1000℃ for 3 hours, and the intensity of YAG X-ray diffraction peaks increased with the increase of calcination temperature. Lattice parameters of Nd：YAG phase calcined at 900℃- 1200℃ changed from 1.2012 nm to 1.1994 nm, and the particle size ranged from 31-96 nm. The similar variation was given by a measure of laser particle analyzer. The TG-DTA results indicate that the mass loss value was about 43% when the precursor was heated up to 1200℃. Suspension was washed with distilled water and alcohol, respectively. The comparison results show that alcohol is more effective for the well-dispersion of the nano-sized Nd：YAG powders. The results provid references for preparing good powders of YAG transparent ceramics.