CAJ | 학술논문

采用自悬浮定向流法制备单相Ag2Al金属间化合物纳米颗粒及Ag和Al纳米颗粒;利用透射电镜、X射线衍射、X射线光电子能谱分析、电感耦合等离子体发射光谱等对纳米Ag2Al微晶的形貌、粒度、相组成、成分及微结构进行表征.研究表明:所制备的金属间化合物纳米粒子为球形的六边形结构,其平均粒径为33μm,样品中Ag和Al的摩尔比非常接近标准配比2∶1,颗粒由单相的Ag2Al组成.对放置在空气中的Ag2Al纳米颗粒表面成分进行分析,XPS测试结果表明:在Ag2Al微晶表面形成了一层很薄的氧化物膜,可能是铝的氧化物或银铝氧化物.实验证实,通过控制气相反应的工艺条件可以制备出粒径很小的单相Ag2Al纳米晶.
채용자현부정향류법제비단상Ag2Al금속간화합물납미과립급Ag화Al납미과립;이용투사전경、X사선연사、X사선광전자능보분석、전감우합등리자체발사광보등대납미Ag2Al미정적형모、립도、상조성、성분급미결구진행표정.연구표명:소제비적금속간화합물납미입자위구형적륙변형결구,기평균립경위33μm,양품중Ag화Al적마이비비상접근표준배비2∶1,과립유단상적Ag2Al조성.대방치재공기중적Ag2Al납미과립표면성분진행분석,XPS측시결과표명:재Ag2Al미정표면형성료일층흔박적양화물막,가능시려적양화물혹은려양화물.실험증실,통과공제기상반응적공예조건가이제비출립경흔소적단상Ag2Al납미정.
Single-phase Ag2Al intermetallic nanoparticles,and Ag and Al metallic nanoparticles were synthesized by the flow-levitation (FL) method.Measurements of d-spacings from X-ray diffraction and electron diffraction confirmed that the intermetallic nanoparticles had the hexagonal Ag2Al structure.The morphology,crystal structure and chemical composition of Ag2Al nanoparticles were investigated by transmission electron microscopy,X-ray diffraction and induction-coupled plasma spectroscopy.A thin amorphous coating was formed around the particles when exposed to air.Based on the XPS measurements,the surface coating of the Ag2Al nanoparticles could most likely be aluminum oxide or silver aluminum oxide.Therefore,the single-phase nanocrystalline Ag2Al intermetallic compound particles can be produced by adjusting some experimental parameters in FL method.