共沉淀法制备纳米YAG粉体

Preparation of Nanoscaled YAG Powders by Co-Precipitation Method

用共沉淀方法，采用共滴的方式，仔细控制反应过程中的ｐＨ值，获得具有包裹结构的共沉淀物，在９００℃煅烧后，可以获得纯ＹＡＧ相粉体．研究了初始溶液浓度及ｐＨ值对粉体性能的影响，所制备的ＹＡＧ粉体的比表面积随着初始溶液浓度的增加而减少，并随着滴定过程所控制的ｐＨ值的增加而迅速减少．通过优化工艺，可以获得颗粒大小为２０～３０ｎｍ，比表面达６８ｍ２／ｇ的纯 ＹＡＧ粉体．

The precipitate with the microstructure of Y(OH)(3) coating Al(OH)(3) was obtained through keeping constant pH value in the co-precipitation processing, and pure YAG phase can be prepared after calcination precipite at 900 degreesC. The special surface area of YAG powder became smaller with the increment of Y, Al solution concentration and pH value controlled during the titration. Nanoscaled YAG powder with the size of 20 similar to 30 nm and special surface area of 68m(2)/g can be prepared by the co-precipitation method.