Preparation of YAG Powder by Co-Precipitation Method in a Narrow pH-Change Environment

• 作 者: 马奔原 卢铁城
• 机 构: Department of Physics and Key Laboratory for Radiation Physics and Technology of Ministry of Educati
• 出 处: Journal of Wuhan University of Technology(Materials Science
• 发表日期: 2004年期
• 关键词: calcination elliptical Precipitation powders dispersed adding titration sinterin

YAG(Y3Al5O12) powder was prepared by co-precipitation method.To avoid pH values changing intensely during titration process,the 4 3 NH HCO solution with 4 3 NH NO was used as precipitant solution.The pH change of precipitant solution during titration process,compositions of precursor,phase formation process and morphology of the prepared powder were investigated by means of pH meter,FT-IR,XRD and TEM.The results show that the presence of 4 3 NH NO in 4 3 NH HCO solution is crucial to alleviate the pH change,lower the calcination temperature and meliorate the morphology of YAG powder.The mechanisms were studied in detail.The YAG phase can be obtained at a lower temperature of 900 ℃.The obtained powder,composed of elliptical particles,showed a meliorated morphology.

YAG (Y3Al5O12) powder was prepared by co-precipitation method. To avoid pH values ​​changing intensely during titration process, the 4 3 NH HCO solution with 4 3 NH NO was used as precipitant solution. The pH change of precipitant solution during titration process, compositions of precursor, phase formation process and morphology of the prepared powder were investigated by means of pH meter, FT-IR, XRD and TEM. The results show that the presence of 4 3 NH NO in 4 3 NH HCO solution is crucial to alleviate the pH change, lower the calcination temperature and meliorate the morphology of YAG phase. The mechanisms were studied in detail. The YAG phase can be obtained at a lower temperature of 900 ° C. The resulting powder, composed of elliptical particles, showed a meliorated morphology .