杨华明,李云龙,唐爱东,张向超,周灿伟

• 1:中南大学资源生物学院无机材料系
• 2:长沙大学
• 3:中南大学资源生物学院无机材料系
• 4:中南大学资源生物学院无机材料系

摘要(Abstract)：

以Co(NO3)2·6H2O和NH4HCO3为原料,利用固相反应合成无定形前驱体,再经焙烧合成Co3O4纳米晶。用X射线衍射(XRD)分析了不同焙烧温度对合成Co3O4晶粒尺寸的影响。研究结果表明:按Scherrer公式估算合成Co3O4纳米晶的晶粒尺寸在10～40nm,焙烧温度越高,晶粒尺寸越大;根据前驱体不同升温速率下的差热(DTA)曲线,用Kissinger和Ozawa法计算合成Co3O4纳米晶的活化能分别为132.77kJmol和141.17kJmol,差别不大;根据晶粒生长动力学理论计算Co3O4晶粒长大的活化能为15.44kJmol,表明热处理过程Co3O4纳米晶粒的长大主要以界面扩散为主。

关键词(KeyWords)： 四氧化三钴(Co3O4);纳米晶;固相合成;动力学;活化能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(50304014);; 湖南省科技攻关计划资助项目(03GKY3038);; 中南大学研究生教育创新工程资助项目(030702);; 长沙大学科学技术研究基金资助项目(SF030302)

作者(Author): 杨华明,李云龙,唐爱东,张向超,周灿伟

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