气相SiO和竹材生物模板制备SiC纳米线(英文)  

SiC NANOWIRES PREPARED FROM GASEOUS SiO AND BAMBOO BIOTEMPLATES

作　　者：李翠艳[1] 黄剑锋[1] 卢靖[1] 杨长安[1] 

机构地区：[1]陕西科技大学材料科学与工程学院,陕西西安710021

出　　处：《陕西科技大学学报（自然科学版）》2008年第5期6-9,共4页Journal of Shaanxi University of Science & Technology

基　　金：教育部博士学科点专项基金(20070708001);陕西科技大学自然科学基金(ZX07-15)

摘　　要：以毛竹为原材料,在1000℃碳化后制得竹炭生物模板,采用气相SiO碳热还原反应在生物模板表面制备了SiC纳米线,利用XRD、SEM和TEM等测试手段对SiC纳米线的物相组成、微观形貌进行了分析,探讨了SiC纳米线在生物模板表面上的生长机理.结果表明:SiC纳米线的主晶相为β-SiC,直径和长度分别为20～70nm和10～20μm,大多数SiC纳米线呈直线状,且表面光滑.SiC纳米线沿[111]方向生长.Bamboo has been converted to a porous biotemplate by annealing in an inert atmosphere above 1 000 ℃. Carbothermal reduction of the gaseous SiO at 1 300 ℃ resulted in the formation of SiC nanowires. Microstructure characterization of the SiC nanowires was carried out by X-ray diffraction （XRD）, transmission electron microscopy （TEM） and scanning electron microscopy （SEM）. XRD analysis showed that. the reaction product is crystalline ff SiC. The diameter and the length of the SiC nanowires is ranging from 20-70 nm and 10- 20 μm. Most of the SiC nanowires possess a straight and a smooth morphology. SiC nanowires have a preferential growth axis parallel to the [111] direction.

关 键 词：碳热还原反应 SIC纳米线 微观形貌 

分 类 号：TQ163.4[化学工程—高温制品工业]