摘 要: 以甲烷为燃料、空气为氧化剂、TiCl₄ 为原料, 采用燃烧法合成 了纳米二氧化钛, 利用扫描电镜和 X 射线衍射对制备出的纳米 TiO₂颗粒产品的颗粒尺寸分布和物相组成进行了表征, 通过调节甲烷、空 气、载气的流量, 并通过热电偶测量火焰温度, 制备出不同操作工况下 的纳米 TiO₂ 产品, 讨论了工艺参数对颗粒特性的影响。结果表明, 获 得的纳米 TiO₂ 粒径主要分布在 50～70 nm, 产品中大部分为锐钛矿 相, 含有少量的金红石相。 

关键词: 燃烧法; 纳米二氧化钛; 工艺参数

Abstract: The experimentation of TiO₂ nano-particles synthesized by the TiCl₄ in methane /air flame was investigated. The size characteristics of particle and phases of products prepared under different operational con ditions were analyzed by SEM and XRD. Different TiO₂ nano-particles were synthesized by changing velocity of methane, air and TiCl₄ flow. The particle characteristic influenced by different operational conditions was discussed. The results showed that the particle size range of nano-sized TiO₂ was 50 ～70 nm. A greater part of the product was anatase phase and a little rutile phase was obtained. 

Keywords: combustion; nano-sized TiO₂; process parameters