摘要
以AlCl3.6H2O和NH4HCO3为原料,采用室温固相化学反应获得前驱体,1100℃煅烧1.5h,制备纳米α-Al2O3粉体,用XRD、TEM、BET及电子衍射等进行表征,通过对粒径和Zeta电位分析,研究了不同pH值、分散剂及其用量对纳米α-Al2O3粉体悬浮液分散性的影响。实验结果表明:产物为α-Al2O3,颗粒粒径为20nm^30nm,粒子尺寸分布较均匀,比表面积为66.32m2/g;悬浮液的分散性能受到pH值、分散剂种类及其加入量的影响,找到了制备高分散的、稳定的α-Al2O3悬浮液的最佳pH值及PEG10000的最佳添加量。
Precursors were prepared by solid state reaction with AlCl3·6H20 and NH4HCO3 as raw materials at ambient temperature, then these precur- sors sintered at 1100℃ for 1.5h, The analysis of XRD.TEM and electron diffraction indicates that α - Al2O3 particles are 20nm-30nm in diameter and uniformly distributed, The analyses of BET show that the specific surface of α - Al2O3 particles is 66.32m^2/g, These suspensions were studied by means of determined particle size and Zeta potential measurements. The results show that the dispersion of the suspension is drastically subject to the pH value of suspension.the kinds and concentration of dispersants. The optimizing range of pH value and the best concentration of dispersants PEG10000 for preparation high dispersed α - Al2O3 suspension was found.
出处
《轻金属》
CSCD
北大核心
2007年第9期9-12,共4页
Light Metals
基金
国家科技部重大基础前期研究专项项目(2005CCA00200)
广西科学研究与技术开发计划(桂科能0630006-5)
广西区研究生创新计划项目(2006105960805M06)
