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材料研究学报  2005, Vol. 19 Issue (3): 297-302    
  论文 本期目录 | 过刊浏览 |
Al2O3/NiO包裹Ni纳米颗粒的结构和磁性
史桂梅12;张志东2;李志杰1;杨洪才3
1.沈阳工业大学 2.中国科学院金属研究所 3.东北大学
引用本文:

史桂梅; 张志东; 李志杰; 杨洪才 . Al2O3/NiO包裹Ni纳米颗粒的结构和磁性[J]. 材料研究学报, 2005, 19(3): 297-302.

全文: PDF(644 KB)  
摘要: 用电弧法蒸发Ni-Al合金(4%~5% Al, 质量分数), 制备了Al2O3NiO包裹Ni及Ni-Al合金纳米颗粒. 高分辨电镜显示该纳米颗粒具有壳核结构, 核为纳米Ni及Ni-Al合金, 壳为Al2O3/NiO复合氧化物. 壳的厚度为2~4 nm, 颗粒的尺寸为5~60 nm. 壳核结构防止纳米Ni颗粒的进一步氧化和团聚. 饱和磁化强度为29.6 Am2/kg, 矫顽力为4.13 kA/m. 由于铁磁和反铁磁性相界面处存在交换耦合作用, 磁滞曲线出现小的偏置.
关键词 复合材料电弧法纳米颗粒磁性质Al2O3    
Key words
收稿日期: 1900-01-01     
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