全文下载：2013050465
齐学礼， 李镇江*， 李伟东， 孙莎莎
（青岛科技大学 机电工程学院， 山东 青岛266061）
摘要： 采用化学气相反应法(CVR)，以球磨后的Si粉、SiO2粉及CH4气体为原料，镍为催化剂，在1250 ℃下成功制备出大量SiC一维纳米材料。着重研究了甲烷通气速率/通气量对产物宏观产量、微观形貌的影响规律。采用扫描电镜(SEM)、透射电镜(TEM)、X射线衍射(XRD)等多种测试手段对所得产物进行了表征。结果表明：随CH4通气速率/通气量的减少，产物宏观颜色由深蓝色转变成灰白色，纳米线直径变得不均匀，纳米线的堆积密度逐渐增大。在通气速率为0.054 L·min-1、通气时间36 min、通气量1.4 L优选工艺条件下，所制备的一维纳米材料为带有少许非晶SiO2包覆层的立方结构的β-SiC。
关键词： SiC一维纳米材料； 化学气相反应； 宏观产量； 微观形貌
中图分类号： TB 34; TQ 343.6文献标志码： A
Influence of CH4 Ventilation Ratio/Ventilation Volume on Synthesis of Large-scale SiC One-dimensional Nanomaterials
QI Xue-li, LI Zhen-jiang, LI Wei-dong, SUN Sha-sha
（College of Electromechanical Engineering, Qingdao University of Science and Technology， Qingdao 266061, China）
Abstract: The SiC one-dimension materials were successfully synthesized by Chemical Vapor Reaction (CVR) approach at 1250 ℃. A mixture of milled Si and SiO2 powders and CH4 were selected as starting materials, and Ni was employed as catalyst. The influence of ventilate ratio and ventilation volume on the macroscopic production and microstructure of the product were detailed investigated. The as-prepared products were characterized by digital camera (DG), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray powder diffraction (XRD). The results show that the macroscopic color of the as-obtained product changes from dark blue to gray-white, the diameter of the nanowires gradually become uneven and the bulk density increased with the ventilate ratio/ventilation volume decrease. The nanomaterials obtained under the optimization process conditions of0.054 L·min-1 ventilate ratio, 36 min ventilate time and1.4 Lventilation volume are cubic single crystal β-SiC with little amorphous SiO2 wrappers.
Key words:SiC one-dimensional nanomaterial; chemical vapor reaction (CVR); macroscopic production; microstructure
收稿日期：2012-11-01
基金项目： 国家自然科学基金项目(51272117，50972063，51172115)；山东省自然科学基金项目(ZR2011EMZ001，ZR2011EMQ011)；山东省科技攻关计划项目(2012GGX10218)；科技型中小企业技术创新基金项目(10C26213712086).
作者简介： 齐学礼（1985—），男，硕士研究生.*通信联系人.
