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金红石型二氧化钛粒子成长及动力学 被引量:1

Grain Growth and Kinetics of Nanocrystalline Rutile Titania
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摘要 利用XRD技术研究了以TiCl4为原料、用前驱体方法制备的金红石型TiO2的粒子成长及其动力学.结果表明:随着热处理温度的不断升高,TiO2纳米粒子的粒径也逐渐增大,在773K以下,粒子生长缓慢,在773K以上,粒子生长迅速.温度一定,TiO2粒子随热处理时间增加而长大,且在前2h内增长较快,2h后粒径趋于稳定,粒子的成长主要受温度控制,热处理时间对粒子成长影响较小;粒子成长的表观活化能以773K为界分为两部分,温度高于773K时,粒子生长表观活化能为54.62±373kJ/mol;温度低于773K时,粒子生长表观活化能为6.43±3.39kJ/mol. The grain growth and kinetics of nanocrystalline titania prepared by using a precursor methodfrom titanium terachloride were studied. The grain size grew slowly when annealing temperaturebelow 773K but fast above 773K. The grain growth activation energy is 54.62±3.73kJ/mol atT >773K and 6.43±3.39kJ/mol at T <773K.
机构地区 东北大学化学系
出处 《无机材料学报》 SCIE EI CAS CSCD 北大核心 1998年第5期729-732,共4页 Journal of Inorganic Materials
基金 国家自然科学基金!59474014 辽宁省科委基金!93119019
关键词 粒子成长 动力学 表观活化能 二氧化钛 金红石型 titania, grain growth, kinetics, activation energy
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  • 1罗菊,材料科学进展,1993年,7卷,52页
  • 2姚光辉,华东化工学院学报,1990年,18卷,449页

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