微通道反应-共沉淀法制备YAG纳米粉体

以碳酸氢铵为沉淀剂,采用微通道反应与共沉淀法相结合的方法制备出了钇铝石榴石纳米粉体。实验考查了溶液浓度、pH值、Nd3＋掺杂等因素对合成纯相YAG纳米粉体的影响。结果表明增大沉淀剂浓度不利于纯相YAG粉体的制备,当沉淀剂浓度为0.4mol/L,Al 3＋浓度范围为0.1～0.4mol/L的条件下均得到纯相YAG纳米粉体;采用优化的实验条件,体系pH值维持在8左右,以2%（原子分数）的Nd3＋取代YAG中的Y3＋,900℃保温4h得到纯相Nd∶YAG粉体,粉体平均粒径在40nm左右,分布均匀,呈近球形。

Preparation of YAG nanopowders by using microchannel-reaction and co-precipitation method

YAG nanopowders were preparated by microchannel-reaction and co-precipitation method.The experiment examine the solution concentration,pH,Nd3+-doped and other factors on the synthesis of pure phase YAG powders.The results show that: It is not conducive to the preparation of pure phase YAG powders by increasing the concentration of precipitant,while precipitant concentration of 0.4mol/L,and Al3+ concentrations ranging from 0.1 to 0.4mol /L,that all obtain pure phase YAG powders;using the optimization experimental condition,the pH value was maintain at about 8,2at% Nd3+ replace of Y3+ in YAG,after calcined by 900℃ for 4h,pure phase of Nd∶YAG powders are obtained.The average particle size of powders was about 40nm,evenly distributed,and show a nearly spherical.