阳极氧化电沉积法制备超细γ-Al_2O_3  

PREPARATION OF NANO-PARTICULATE γ-Al_2O_3 BY ANODIC OXIDATION ELECTRODEPOSITION

作　　者：闫慧敏[1] 张朝平[1] 

机构地区：[1]贵州大学理学院化学系,贵阳550025

出　　处：《硅酸盐学报》2007年第10期1287-1290,1297,共5页Journal of The Chinese Ceramic Society

基　　金：贵州省教育优秀科技人才(省长)基金[2003(05)]资助项目

摘　　要：以有机高分子聚乙二醇10000(polyethylene glycol,PEG10000)为分散剂,通过在阳极氧化电沉积过程中,改变电解槽中电沉积液的pH值和浓度,来制备超微细γ-Al2O3粉体。用X射线衍射、透射电镜、红外光谱等测试手段对粉体的粒径、结构和形貌进行了研究。结果表明:超微细γ-Al2O3粉体的形成及粒径大小是受聚乙二醇的分散扩散作用和不同的煅烧温度所控制,用PEG10000作分散剂可很好的控制Al2O3粒子的尺寸,使颗粒小于100nm,在800℃,煅烧1h后得到成分较单一的γ-Al2O3。Nano-particulate powders of γ-Al2O3 were prepared in organic macromolecular polyethylene glycol （PEG 10000） dispersant by anode oxidation potentiodynamic deposition process through changing the medium pH and total concentrations of precursors in the plating bath. The size, configuration and morphological information of these nano-particulate γ-Al2O3 powders were investigated through X-ray diffraction, transmission electric microscopy and infrared spectroscopy. The results show that the formation and particulate size of nano-particulate γ-Al2O3 powders are controlled by the dispersion and diffusion effects of PEG and the calcination temperature. The particulate size ofγ-Al2O3 powder can be well controlled by using PEG10000 as a dispersant. The single composition of γ-Al2O3 powders with diameters under 100 nm could be made by calcination for 1 h at 800 ℃.

关 键 词：氧化铝 超微细粉体 阳极氧化 电沉积 

分 类 号：TQ042[化学工程]