尿素共沉淀法制备Nd：YAG纳米粉体  

Preparation of nanoscaled Nd:YAG powders by the urea co-precipitation method

作　　者：李冬青[1] 丁丽华[1] 张庆礼[1] 邵淑芳[1] 宁凯杰[1] 殷绍唐[1] 

机构地区：[1]中国科学院安徽光学精密机械研究所安徽省光子器件与材料重点实验室,安徽合肥230031

出　　处：《量子电子学报》2010年第1期110-115,共6页Chinese Journal of Quantum Electronics

基　　金：国家自然科学基金(50772112;50872135);安徽省优秀青年科技基金(08040106820)资助项目

摘　　要：采用共沉淀方法,以Nd_2O_3、Y_2O_3和Al(NO_3)_3·9H_2O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3 h出现了YAG相和YAM中间相,在1000℃及其以上煅烧3 h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1.2012 nm变化到1.1994 nm,颗粒度从31 nm变化到96 nm,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。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.

关 键 词：材料 纳米粉体 尿素共沉淀法 ND:YAG 颗粒度 

分 类 号：TF123[冶金工程—粉末冶金]