碳铵尿素双沉淀法合成球形纳米α-Al_2O_3粉体的研究  

Study on the Synthesis of Spherical Nano α-Al_2O_3 Powders by Co-precipitation Method Using Ammonium Carbonate and Urea

作　　者：武志富 卿培林 徐敬尧 WU Zhi-fu;QING Pei-lin;XU Jing-yao(School of Materials Science and Engineering, Baise University, Baise 533000, China)

机构地区：[1]百色学院材料科学与工程学院,百色533000

出　　处：《人工晶体学报》2019年第2期303-306,共4页Journal of Synthetic Crystals

基　　金：广西高校重点学科:材料物理与化学开放课题项目(090106001);百色学院铝基复合材料特色研究团队项目(081005002);广西一流学科(培育)建设项目(桂教科研[2018]12号);2019年广西壮族自治区硕士学位授予单位立项建设经费资助

摘　　要：报道了一种用硝酸铝和碳酸铵以及尿素反应制备球形纳米α-Al_2O_3粉体的便捷方法。通过X射线粉末衍射、差热分析和扫描电镜对产物进行表征观察,结果显示,用这种方法所合成的前驱体为2～6μm鹅卵石形状的氢氧化铝。前驱体再经1200℃煅烧2 h得到直径为200 nm左右的孪生球形纳米氧化铝粉体。在此过程中,尿素起到了调节形貌的作用。This paper reports a convenient method for preparing spherical nano-α-Al 2O 3 powder by reaction of aluminum nitrate with ammonium carbonate and urea. The product was characterized and observed by X-ray powder diffraction, differential thermal analysis and scanning electron microscopy. The results show that a cobblestone-shaped aluminum hydroxide precursor of 2-6 μm was formed. After calcining at 1200 ℃ for 2 h, the twin spherical nano alumina powder with a diameter of about 200 nm was obtained. In this process, urea played a role in adjusting the morphology.

关 键 词：氧化铝 球形 双沉淀法 

分 类 号：O611[理学—无机化学]