新型多孔氧化物球形粉末的雾化反应法制备

PREPARATIONS OF NEW POROUS OXIDES SPHERICAL POWDERS BY SPRAY REACTION TECHNIQUE

摘要: 采用新颖的雾化反应法制备出新型多孔ZrO₂、ZrO₂(Y₂O₃)、Al₂O₃、SnO₂球形粉末。通过对产物表征表明:目前制备的上述氧化物粉末颗粒平均粒径Doxides<3μm,颗粒球形度好,球表面光滑。球形颗粒有三种显微结构:均匀多孔结构;核心疏松;外层致密多孔结构;空心多孔结构。煅烧后多孔氧化物球形粉末的比表面积温度分别为,c-ZrO₂(700℃):～31.0 m²/g,t-ZrO₂(Y₂O₃)(600℃):～34.9 m²/g,α-Al2O3(1 200℃):～170 m²/g。

Abstract: New porous ZrO₂、ZrO₂（Y₂O₃）、Al₂O₃、SnO₂、and SnO₂ spherical powders were prepared by novel spray reaction method.SEM,TEM/HRTEM,BET surface area,and XRD characterizations show that the average diameters of the obtained porous oxides powders are ＜3 μm,and particles are fairly spherical morphology with smooth surface.The spherical oxides particles possess three kinds of microstructures:homogeneous porous structure,porous structure with a loose core and dense shell,and hollow porous structure.After calcinations BET surface areas of porous oxides powders are c-ZrO₂（700 ℃）:～31.0 m²/g,t-ZrO₂（Y₂O₃）（600 ℃）:～34.9 m²/g,α-Al₂O₃（1 200 ℃）:～170 m²/g,respectively.