(1. 中南大学 粉末冶金国家重点实验室,长沙 410083;2. 中南大学物理科学与技术学院,长沙 410083)
摘 要: 以WO3粉末为原料,通过气相沉积法在钨片基底上制备出W18O49亚微米棒阵列。采用扫描电子显微镜(SEM)、透射电子显微镜(TEM)和X射线衍射分析(XRD)等对制备出的氧化钨亚微米棒阵列进行物相及形貌分析和表征。同时,提出了W18O49亚微米棒的生长机理,并讨论了生长温度对亚微米棒阵列密度和直径的影响。结果表明:制备出的W18O49氧化钨亚微米棒具有单晶单斜结构,长度为5~15 μm,直径为200~800 nm,沿[010]方向生长。
关键字: 氧化钨;亚微米棒;单晶;气相沉积
(1. State Key laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;
2. School of Physics Science and Technology, Central South University, Changsha 410083, China)
Abstract:The W18O49 submicron-rod arrays were grown on tungsten substrate by vapor deposition using WO3 powders as raw material. The morphology and structure of the resultant tungsten oxide submicron-rods were characterized by scanning electron microscopy, transmission electron microscopy and X-ray diffractometry. Finally, the growth mechanism of the submicron-rod was proposed, and the influence of the temperature on the density and diameter of the submicron-rod arrays was also investigated. The results show that the synthesized W18O49 submicron-rods are a single-crystalline structure with lengths of 5−15 μm and diameters of 200−800 nm.
Key words: tungsten oxide; submicron-rods; single crystal; vapor-deposition