Synthesis of monodispersed nanometer-sized YAG powders by a modified coprecipitation method

• Published in: Journal of rare earths Vol. 26; no. 5; pp. 674 - 677
• Main Author: 潘林 秦晓英 李地 张建
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.10.2008; Key Laboratory of Materials Physics,Institute of Solid State Physics Chinese,Academy of Sciences,Hefei 230031,China
• Subjects: agglomeration; iodine; nanostructured materials; precipitation; rare earths; yttrium aluminum garnet; 凝聚作用; 沉淀作用; 纳米结构材料; precipitation; agglomeration; iodine; yttrium aluminum garnet; nanostructured materials; rare earths
• ISSN: 1002-0721; 2509-4963
• DOI: 10.1016/S1002-0721(08)60160-X

Nanometer-sized yttrium aluminum garnet （YAG） powders were synthesized by using the coprecipitation method with ammo- nium hydrogen carbonate as a precipitant. The results indicated that an extremely loose YAG precursor was obtained when iodine was intro- duced in the coprecipitation process on the condition that the initial concentrations of Y^3＋ and Al^3＋ in the solution were set at 0.018 and 0.03 mol/L, respectively, and pH=8. Consequently, the resulting YAG powders after calcination at 1173 K for 2 h were composed of monodispersed particles with an average grain size of 30 nm and better sinterability. The present results indicated that the modified coprecipitation method, with iodine as an additive, was superior to the conventional coprecipitation method, to synthesize ultrafine YAG powders.