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.
出处
《炭素技术》
CAS
CSCD
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)
关键词
直流碳弧法
碳包铁纳米粒子
纳米粒子
退火处理
DC carbon arc discharge
carbon -coated iron nanoparticles
nanoparticles
annealing
