纳米Al_2O_3陶瓷粉料喷雾干燥制粒  

Study on Spray Drying of Nanometer Al_2O_3

作　　者：侯玉柏[1] 曾克里[1] 李振铎[1] 赵晓东[1] 马江虹[1] 任先京[1] 

机构地区：[1]北京矿冶研究总院,北京100044

出　　处：《有色金属（冶炼部分）》2008年第S1期27-30,共4页Nonferrous Metals（Extractive Metallurgy)

摘　　要：利用喷雾干燥技术对纳米Al_2O_3粉体进行造粒,研究了浆料固含量、粘结剂含量及分散剂含量对喷雾干燥粉体颗粒形貌、结构、松装密度和流动性的影响。结果表明:当料浆固相含量为50%,分散剂和粘结剂分别为固相质量的0.04%和1.0%时,浆料具有合适的粘度和最佳的分散稳定性,喷雾造粒得到的粉体为球形,表面光滑致密,具有较高的松装密度和流动性,能满足各种压制成型的需要。Nanometer Al_2O_3 powders were prepared by spray drying.The effects of solid loading and binder content on the morphology,microstructure,loose packed density and flow rate of the spray dried granules were studied.When solid content is 50%of total mass,the dispersant and binder concentration are 0.04% and 1.0%of solid loading respectively,the slurry has suitable viscosity and good dispersant stability.The optimized slurry was spray-dried successfully to produce spherical granules with good spherical shape and uniform size distribution.The powders have good flow rate and high packing densities.

关 键 词：喷雾干燥 纳米Al₂O₃ 粘结剂 分散剂 

分 类 号：TB383.1[一般工业技术—材料科学与工程]