论文部分内容阅读
用高频感应加热法在Ar气氛中制备了Zn超细颗粒,利用透射电镜、X-射线衍射仪、X-电子能谱议、红外谱仪及差示扫描术研究了颗粒的形态、晶体结构、表面组成、光吸收及颗粒的热稳定性。结果表明.颗粒形状大部分为六边形,也有少量立方形,晶体结构与块材Zn相同,在紫外及可见光部分有很强的先吸收,而在红外吸收谱上的一个吸收峰可能是表面氧化层表面声子吸收所致。在室温下,颗粒是稳定的,但在高温下,由于表面吸附的氧而发生了氧化过程。
Zn ultrafine particles were prepared by high frequency induction heating in Ar atmosphere. The morphology and crystal structure of the particles were characterized by transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, infrared spectroscopy and differential scanning , Surface composition, light absorption and thermal stability of the particles. The results show. Most of the particle shape is hexagonal, but also a small amount of cubic, the same crystal structure and bulk Zn, UV and visible light part of the first strong absorption, and in the infrared absorption spectrum of an absorption peak may be surface oxide surface Phonon absorption due. At room temperature, the particles are stable, but at high temperatures, oxidation occurs due to oxygen adsorbed on the surface.