( 1. 湖南科力丰新能源科技有限公司, 长沙 410075；
2. 中南大学 粉末冶金国家重点实验室， 长沙 410083；
3. 中南大学 物理科学与技术学院, 长沙 410083)
摘 要: 通过W粉和Ni(NO3)2·6H2O在钼包套内反应， 制备出微米尺度的绒球状结构氧化钨。 绒球状结构由长度达数百微米、 外径1～10 μm的微米管和直径100~500 nm的亚微米纤维组成。 X射线衍射和透射电子显微镜分析表明： 产物为具有良好晶体结构的沿［010］方向生长的单斜结构的W18O49。 这些通过Vapor-Solid（V-S）生长机制形成的绒球状结构氧化钨因为具有巨大的表面积， 在微型半导体敏感元件方面具有巨大的应用前景。
关键字: 氧化钨； 绒球状结构； 微米管； 纤维
（ 1. Hunan Cofly New Energy Source Co Ltd,
Changsha 410075, China;
2. State Key Laboratory for Powder Metallurgy,
Central South University, Changsha 410083, China;
3. School of Physics Science and Technology,
Central South University, Changsha 410083, China）
Abstract: Micrometer scale tungsten oxide with pompon-like structure was prepared by the reaction of the mixture powder of W and Ni(NO3)2 ·6H2O in a molybdenum envelopment. The pompon-like structure consists of microtubes with outer diameter of 1-10 μm and fibrils with diameter of 100-500 nm which are hundreds of micrometers in length. XRD and TEM analyses show that the as-synthesized product were well-crystallized monoclinic structure W18O49 with the axes preferentially aligned along the ［010］ direction. The pompon-like structure was formed by the Vapor-Solid (V-S) mechanism. With the huge surface of the unique pompon-like structure, the potential application of micrometer scale tungsten oxide in micro-sized semiconductor sensors would be promising.
Key words: tungsten oxide; pompon-like structure; microtubes; fibrils
