【摘要】 以茶多酚为沉淀剂 ,在溶液中与AlCl3 充分反应 ,生成茶多酚铝盐前驱体 ,沉淀的最佳pH值为 5 6 ,后者在空气中 10 30℃左右热处理 90～ 15 0min制得质量分数为 99 5 1%的Al2 O3 。样品的TEM、XRD和DTA分析结果表明 ,所得氧化铝样品为α Al2 O3 ,粒径约 5 0nm。更多还原

【Abstract】 Tea-polyphenols was chosen as a precipitant to react with aluminum ion in aqueous solution for preparing aluminum tea-polyphenols precursor, the optimal pH value of the reactant solution for complete precipitation was 5.6. When the precursor was heated at 1 030 ℃ in an O 2-rich atmosphere for 90～150 min, aluminum oxide powders with alumina content of 99.51% were prepared. The samples were characterized by DTA, TEM and XRD techniques. The resulting samples are nanomaterials consist of nearly spherical α-Al 2O 3 particles with diameter of 50 nm.更多还原