东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2012, Vol. 33 ›› Issue (7): 962-964+974.DOI: -

• 论著 • 上一篇    下一篇

铁纳米颗粒的脉冲激光气相蒸发-液相合成研究

陈岁元;陈双建;梁京;刘常升;   

  1. 东北大学材料各向异性与织构教育部重点实验室;
  • 收稿日期:2013-06-19 修回日期:2013-06-19 发布日期:2013-04-04
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    中央高校基本科研业务费专项资金资助项目(N100702001);;

Synthesis of Fe nanoparticles by pulsed laser gas phase evaporation-liquid phase collection

Chen, Sui-Yuan (1); Chen, Shuang-Jian (1); Liang, Jing (1); Liu, Chang-Sheng (1)   

  1. (1) Key Laboratory for Anisotropy and Texture of Materials, Ministry of Education, Northeastern University, Shenyang 110819, China
  • Received:2013-06-19 Revised:2013-06-19 Published:2013-04-04
  • Contact: Chen, S.-Y.
  • About author:-
  • Supported by:
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摘要： 采用激光气相蒸发-液相收集新方法合成纳米Fe颗粒,主要利用扫描电镜、透射电镜和振动样品磁强计等分析方法对纳米颗粒的形貌、大小、磁性及合成机理进行了分析.结果表明:以45#钢为靶材、20%乙二醇+80%乙醇为液相收集体系和N2为载气,在激光能量密度为42 J/mm2、脉宽3 ms、频率10 Hz和N2流量为0.5 L/min的条件下,成功制备出了Fe纳米颗粒;颗粒呈球形且呈链状连接趋势,主要粒径在20~30nm之间;纳米铁颗粒矫顽力为523 Oe,饱和磁化强度为45 emu/g;脉冲激光诱导45#钢靶材产生含Fe成分的等离子体,在气相中均匀成核,并发生一定程度的长大,然后在载气N2的带动下进入液...

关键词: 纳米铁颗粒, 激光气相蒸发-液相收集, 原位分散, 靶材, 液相

Abstract: Fe nanoparticles were synthesized by a new method of pulse laser gas phase evaporation-liquid phase collection. The morphology, structure, magnetic properties and synthesis mechanism were studied by scanning electron microscopy(SEM), transmission electron microscopy(TEM) and vibration magnetometer. The results showed that using 45# steel as the target, 20% ethylene glycol+80% ethanol as the liquid collection system, and N2 as the carrier gas, Fe nanoparticles are successfully prepared under the conditions of the laser power density 42 J/mm2, pulse width 3 ms, frequency 10 Hz, and the N2 flow 0.5 L/min. The particles are spherical and show a trend of chain connectivity, the main size of the Fe particles is 20~30 nm; the coercivity of iron nanoparticles is 523 Oe, the saturation magnetization is 45 emu/g. The plasma with Fe composition was generated from 45# steel target by pulsed laser ablation, after homogeneous nucleation and growing of crystal nucleus in the gas phase, Fe crystal nucleus grew up to nano-size Fe particles when they were carried by N2 into the liquid phase. Ethylene glycol in the liquid has played a role in the dispersion of Fe nanoparticles in situ.

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