气相爆轰压力及环境温度对制备纳米TiO_2粉末的影响  

Influence of Gaseous Detonation Synthesis and Ambient Temperature on Nanosized TiO_2 Particles

作　　者：李晓杰[1] 欧阳欣[1] 闫鸿浩[1] 赵铮[1] 姜力[1] 

机构地区：[1]大连理工大学 工业装备结构分析国家重点实验室,辽宁大连116023

出　　处：《稀有金属材料与工程》2007年第A03期371-373,共3页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(10172025;10572043);国家青年科学基金(10602013);辽宁省自然基金(20042161)项目资助

摘　　要：采用气相爆轰方法制备出金红石和锐钛矿相混合晶型的纳米二氧化钛粉末,并用X射线衍射(XRD)、透射电镜(TEM)等表征手法,研究了环境温度变化对其晶粒尺寸和晶相结构的影响。结果表明,随着环境温度的升高,所生成的二氧化钛颗粒的尺度变大,产物中金红石相含量增加,锐钛矿相含量减少。通过测定爆轰压力的变化,得出了反应发生爆燃转爆轰的过程中。Efficient process of gas-phase detonation synthesis has been established for the synthesis of anatase and futile as well as their mixture. The influence of the ambient temperature on the size and the crystalline phase of the TiO2 crystallite were studied by means of X-ray diffraction （XRD） and TEM. The results indicate hat the size of TiO2 crystallite increased and the crystalline phase transformed from anatase to futile with the rise of ambient temperature. It is also found that the reaction took place in a deflagration-to-detonation transition course with the determination of detonation pressures.

关 键 词：爆轰合成 纳米二氧化钛颗粒 晶粒尺寸 晶型 

分 类 号：TB383.1[一般工业技术—材料科学与工程]