两种液相法制备超细γ-Al_(2)O_(3)粉体的形貌及纯度的研究  

Study on morphology and purity of ultrafine γ-Al_(2)O_(3) powder prepared by two liquid-phase methods

作　　者：张茜 万静[1] ZHANG Xi;WAN Jing(School of Chemistry and Environment,Southwest Minzu University,Chengdu 610041,China)

机构地区：[1]西南民族大学化学与环境学院,四川成都610041

出　　处：《西南民族大学学报（自然科学版）》2023年第3期262-268,共7页Journal of Southwest Minzu University(Natural Science Edition)

基　　金：中央高校科研基金研究生项目2022NYXXS086。

摘　　要：超细氧化铝因其优良的机械性能及耐高温、耐腐蚀、高强度的物理性能得以广泛应用.采用液相法制备超细氧化铝粉体即通过沉淀法、溶胶-凝胶法制备出形貌规则、分散性好,粒径较小的氧化铝纳米粉体.纳米氧化铝粉体通过X射线衍射仪(XRD),马尔文纳米粒度仪,扫描电子显微镜(SEM)等进行表征.探究使用不同方法制备的氧化铝纳米粉体的形貌、粒径及结晶情况之间的差异,以及相同方法加不同用量的分散剂对粉体的粒径和形貌的影响.根据表征结果发现在该条件下制备出的粉体为γ-Al_(2)O_(3),SEM结果表明沉淀法制备出的粉体为结晶状态较好、形状均匀的球形Al_(2)O_(3)粉体,使用溶胶凝胶法制备的粉体为蠕虫状的Al_(2)O_(3)粉体,但相较于沉淀法,采用溶胶凝胶法制备的粉体粒径较小.Ultrafine alumina is widely used because of its excellent mechanical properties and high temperature resistance,corrosion resistance and high strength physical propertie.Ultrafine alumina powder was prepared by liquid phase method in the form of alumina nanopowder with regular morphology,good dispersibility and small particle size by precipitation method and sol-gel method.Nano-alumina powders were characterized by X-ray diffractometer(XRD),Malvern nanoparticle size analyzer,scanning electron microscopy(SEM),etc.This paper explored the differences between the morphology,particle size and crystallization of alumina nanopowders prepared by different methods,and the effects of different amounts of dispersants added in each method on the particle size and morphology of the powder.According to the characterization results,the powder prepared under this condition was Al_(2)O_(3),and the SEM results showed that the powder prepared by the precipitation method was a spherical Al_(2)O_(3) powder with good crystalline state and uniform shape,and the powder prepared by the sol-gel method was a worm-like Al_(2)O_(3) powder.Compared with the precipitation method,the powder prepared by the sol-gel method had a smaller particle size.

关 键 词：溶剂凝胶法 均相沉淀法 球形、蠕虫形氧化铝粉体 

分 类 号：TQ133[化学工程—无机化工]