【作者】 苏程裕； 杨宗坤； 林中魁； 林文；

【Author】 Cherng-Yuh Su, Zhong-Kun Yang, Chung-Kwei Lin, Wilson Lin (Institute of Mechatronic Engineering, Taipei University of Technology, Taipei 106, China; Department of Materials Science and Engineering, Feng Chia University, Taichung 407, China; Central Mint, Taoyuan 333, China)

【机构】 台北科技大学机电整合研究所； 逢甲大学材料科学与工程学系； 造币厂；

【摘要】 本研究以电浆电弧为加热源蒸发钨靶材,并藉由气凝合成机制,外加一套吹气装置制备氧化钨奈米棒,分别探讨腔体压力与奈米棒平均直径及产率的关系．研究结果显示,W5O14奈米棒的平均直径和产率都随着腔体压力而增加．当腔体压力从200增加至760 torr时,粉末的产率会由0．383增加至0．729 g／h,而其平均直径也从13．2增加到28．4 nm．此外藉由穿透式电子显微镜的观察可得知氧化钨奈米棒是为单晶结构,其晶格平均间距(d-spacing)为0．38nm,晶面则是以[010]方向来成长,其成长机制则可透过气-固相(Vapor-Solid,VS)模型来作解释．更多还原

【Abstract】 In the present study, tungsten oxide nanorods were prepared by a plasma arc gas condensation technique where a gas nozzle was introduced to provide blowing gas. With the aid of the blowing gases, tungsten oxide nanorods can be prepared under various chamber pressures ranged from 200 to 760 torr. The diameter and production rate of the nanorods is proportional increase to chamber pressures. For the chamber pressure from 200 to 760 torr, the production rate of the nanorods is significantly increased from 0.383 to 0.729 g/h. In addition, the mean grain size only changes from 13.2 to 28.4 nm. The tansimission electron microscopy (TEM) images reveal that tugstan oxide nanorod is the single crystalline structure with the lattice spacing of 0.38 nm and the growth of crystal plane is along [010]. The vapor-solid model is preferred to explain the growth mechanism.更多还原