直流碳弧法合成碳包铁纳米粒子的研究  

CARBON-COATED IRON NANOPARTICLES SYNTHESIZED BY DC CARBON ARC DISCHARGE METHOD

作　　者：周纯[1] 张海燕[2] 曹晓国[2] 何艳阳[2] 胡礼初[2] 

机构地区：[1]广东工业大学物理与光电工程学院,广东广州510006 [2]广东工业大学材料与能源学院,广东广州510006

出　　处：《炭素技术》2006年第4期6-9,共4页Carbon Techniques

基　　金：国家自然科学基金(No.20271014;No.50372013);"十五"国家科技攻关计划项目(No.2003BA310A24);广东省"十五"重大专项(N0.2003A1070301);广东省自然科学基金(No.036918);广东省科技计划项目(No.2004B10301008)

摘　　要：用直流碳弧法制备碳包铁纳米粒子,通过X射线衍射(XRD)、透射电镜(TEM)等分析手段对粒子的成分、形貌等进行表征；在氮气气氛中对粒子进行退火处理,对其形成机理进行了初步的探讨。结果表明：制备的粒子中含有α-Fe相和石墨相,没有铁的氧化物,纳米粒子的尺寸大小在5～50nm范围。铁粒子在碳层的保护下有很好的抗氧化能力。The carbon - coated iron nanoparticles were produced by using DC carbon arc discharge method and characterized by transmission electron microscopy and X - ray diffraction （XRD） . The samples were annealed at different temperatures under nitrogen atmosphere. The growth mechanism of the encapsulated iron nanoparticles was discussed. The results show that the samples contain α - Fe and graphite and no iron oxide appears. The size of the carbon - coated iron nanoparticles is typically in the range 5 ～ 50 mnt Due to the protection of the carbon layers, the oxidation resistance of the carbon - coated iron nanoparticles is increased.

关 键 词：直流碳弧法 碳包铁纳米粒子 纳米粒子 退火处理 

分 类 号：TB383[一般工业技术—材料科学与工程] O613.71[理学—无机化学]