温度对洋葱状富勒烯形成的影响  

The influence of temperature on the growth of onion-like fullerenes

作　　者：姚延立[1] 马国利[1] 

机构地区：[1]滨州学院物理与电子科学系,滨州256600

出　　处：《化工新型材料》2011年第2期91-92,103,共3页New Chemical Materials

基　　金：滨州学院"青年人才创新工程"科研基金项目(BZXYQNLG200805);滨州学院实验技术研究基金项目(BZXYSYXM200917)

摘　　要：在化学气相沉积法(CVD)制备洋葱状富勒烯(OLFs)过程中,温度是最主要的参数之一。以烃类为碳源,二茂铁为催化剂,在不同温度下制备OLFs,分析了温度对形成机理的影响,通过场发射扫描电镜(FESEM)对产物的形貌和微观结构进行了表征。采用热重(TGA)考察了OLFs的热稳定性,表明温度越高,形核所需的最大吉布斯自由能越小,越容易形核,形成的晶核越稳定。当温度超过1000℃时,晶粒之间的融合能力也随之增强,产物出现粘连现象,从而1000℃为制备OLFs的最佳温度。During the process of onion-like fullerenes （OLFs）was synthesized via CVD method, temperature is one of the most important parameters. By using hydrocarbons as carbon sources and ferrocene as catalyst, the OLFs were synthesized in different temperatures. The effect of temperature on the synthesis mechanism was analyzed. The results indicated that the smaller the maximum free enthalpy of nucleation required, the more easy nucleation, and the stabler the crystal nucleus. When the temperature was higher than 1000℃, the fusion ability between grains was improved, and the product was adhered. The most suitable temperature of the OLFs synthesis was 1000℃.

关 键 词：洋葱状富勒烯(OLFs) 温度 CVD 热力学 

分 类 号：TB383.1[一般工业技术—材料科学与工程]