复合纳米金属间化合物Ag_2Al的制备及其结构表征

Preparation of Ag_2Al intermetallic compound nanoparticles by flow-levitation method

采用自悬浮定向流法制备出Ag2Al复合金属间化合物的纳米微粉,通过透射电子显微镜、X射线衍射仪和X射线能谱仪对纳米微粉的显微结构、粒度、相组成和成分构成进行研究。结果表明：所制备出的复合金属间化合物纳米颗粒呈规则球形,粒径分布在20~110 nm之间;纳米合金颗粒的主要组成相为Ag2Al,并伴有少量的Al;样品中的Ag,Al原子数比约为66.5∶33.5,金属间化合物纳米颗粒中Ag2Al晶粒尺寸约为33 nm,Al的约为21 nm。

Ag2Al intermetallic compound nanoparticles were synthesized by the flow-levitation method.The morphologies,granularity and phase structure were investigated by transmission electron microscope,X-ray diffractometer,and energy dispersive spectrometer.The results indicate that the prepared nanoparticles are regular spheres,with the grain size ranging from 20 to 110 nm.The nanoparticles are mainly composed of Ag2Al,including a little Al.The data of chemistry elementary analysis indicate that the atomic ratio of Ag to Al in the nanoparticles is about 66.5∶33.5.The grain size of Ag2Al in the prepared nanoparticles is about 33 nm,and that of Al is about 21 nm.