纳米Al粉的结构和性能表征  

Characterization of Structure and Properties of Al Nanoparticles

作　　者：楚广[1] 唐永建[2] 楚士晋[2] 韦建军[2] 李朝阳[2] 刘伟[2] 

机构地区：[1]中南大学冶金科学与工程学院,湖南长沙410083 [2]中国工程物理研究院,四川绵阳621900

出　　处：《含能材料》2006年第3期227-230,共4页Chinese Journal of Energetic Materials

基　　金：国家自然科学基金(10475069/A0506);中物院面上基金(20050866)

摘　　要：采用自悬浮定向流法制备金属纳米A l粉。用透射电镜(TEM)、X射线能量色散谱(EDAX)、X射线衍射(XRD)、紫外-可见光吸收光谱(UV-V is)和差示扫描量热-热重法(DSC-TG)对纳米微晶形貌、粒度、结构和性能进行了研究。结果表明:纳米A l粉的平均粒径为50 nm,颗粒基本为球形,放置半年后含氧量为8.2%,最大的吸收峰出现在波长为253 nm处。在Ar气流中,在780℃时纳米铝粉增重约20%,熔化峰位置为654.8℃,熔化吸热为136 J.g-1。Al nanoparticles were prepared by flow-levitation method. The morphologies, granularities, structure and properties of particles were investigated by TEM, EDAX, XRD, UV-visible absorption spectroscopy, and thermal analysis （DSC-TG） techniques. The results show that mean granularity of the spheric A1 nanoparticles is 50 nm, the maximum peak absorption appears at wavelength of 253 nm, and the oxygen percentage of Al nanoparticles is 8.2% kept in unsealed glass bottle for half year. In Ar, the weight of Al nanoparticles increases by a factor of 20% approximately from 20 ℃ to 780 ℃, fusing peak of Al nanoparticles appears at 654.8 ℃ , and melting heat is 136 J · g^-1 , respectively.

关 键 词：分析化学 纳米铝粉 性能 热分析 自悬浮定向流法 

分 类 号：TB383.1[一般工业技术—材料科学与工程]