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纳米γ-Al2O3的溶胶-凝胶法制备及表征
引用本文:石涛,郭兴忠,杨辉.纳米γ-Al2O3的溶胶-凝胶法制备及表征[J].稀有金属材料与工程,2008,37(Z2):379-382.
作者姓名:石涛  郭兴忠  杨辉
摘    要:异丙醇铝为先驱体,异丙醇为溶剂,乙酰乙酸乙酯为螯合剂,聚乙二醇(PEG1000)为分散剂,硝酸为胶溶剂,采用溶胶-凝胶法制备了纳米γ-Al2O3.并采用DTA/TG,XRD,TEM等测试技术对纳米γ-Al2O3粉体进行表征.结果表明,通过溶剂、螯合剂、分散剂和胶溶剂的协同效应,在750℃煅烧条件下,γ-Al2O3粒子形貌为针状结构,长度为20~30 nm;在900℃煅烧条件下,γ-Al2O3粒子形貌为颗粒状,平均晶粒尺寸为10 nm左右;纳米γ-Al2O3粒子尺寸均一、分散性良好.

关 键 词:纳米γ-Al2O3  溶胶凝胶法  异丙醇铝  nanocrystalline  γ-Al2O3  sol-gel  aluminum  isopropoxide  纳米  溶胶  凝胶  法制  表征  Nanocrystalline  Characterization  Preparation  size  temperature  particles  length  results  show  transmission  electron  microscope  diffraction  thermogravimetric  analysis  characteristics  differential  thermal  analysis
文章编号:1002-185X(2008)S2-379-04

Preparation and Characterization of Nanocrystalline γ-Al2O3 by Sol-Gel Process
Shi Tao,Guo Xingzhong,Yang Hui.Preparation and Characterization of Nanocrystalline γ-Al2O3 by Sol-Gel Process[J].Rare Metal Materials and Engineering,2008,37(Z2):379-382.
Authors:Shi Tao  Guo Xingzhong  Yang Hui
Abstract:With aluminum isopropoxide(Al(OC3H71)3)as precursor,isopropyl alcohol(C3H7OH)as solvent,ethyl acetoacetate(etac)as chelating agent,polyethylene glycol(PEG1000)as dispersant,HNO3 as peptizing agent,the nanocrystalline γ-Al2O3 powders were prepared by sol-gel process.The characteristics of the powders were investigated by differential thermal analysis(DTA)and thermogravimetric analysis(TG),X-ray diffraction(XRD)and transmission electron microscope(TEM).The results show that the as-prepared γ-Al2O3 particles are needle-like with the length of about 20~30 nm at the calcined temperature of 750°C,become grain-like with the size of about 10 nm at 900℃,and the γ-Al2O3 particles are well uniform and dispersive.
Keywords:nanocrystalline γ-Al2O3  sol-gel  aluminum isopropoxide
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