本工作采用惰性气体蒸发法制备Al超微粒子,采用高分辨透射电子显微镜,X射线衍射和X光电子谱等多种分析技术,详细研究了Al超微粒子的结晶形态、晶体结构、表面状态和组成,结果指出,在高纯惰性气氛中制备的Al超微粒子具有明显的结晶形态,大部分粒子为一单晶体,晶体结构为fcc,α_0=0.405nm,结果还发现,Al超微粒子表面存在一层非晶Al_2O_3,平均厚约2nm,对粒子本身具有很好的保护作用,因此,用惰性气体蒸发法制备的Al超微粒子在空气中是相当稳定的。
The crystal habit, crystalline structure, surface condition and composition ofthe ultrafine Al particles, prepared by an inert gas evaporation method, were studied in detailby means of high resolution transmission electron microscope, X-ray diffraction and X-rayphoto-electron spectrum. The particles are of clear crystal habits, single crystal in a large ma-jority and fcc crystalline structure with α_0=0.405 nm. A protective layer of amorphousAl_2O_3, 2 nm in average thickness, against oxidizing further was found around the particles. Itis believed that the ultrafine Al particles prepared by the inert gas evaporation method arevery stable in atmosphere.
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