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材料研究学报  2008, Vol. 22 Issue (4): 379-383    
  论文 本期目录 | 过刊浏览 |
BN包覆Co纳米胶囊的制备和性能
史桂梅;董阳;黄炎;张金虎
沈阳工业大学;中国科学院金属研究所
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沈阳工业大学;中国科学院金属研究所
引用本文:

史桂梅; 董阳; 黄炎; 张金虎 . BN包覆Co纳米胶囊的制备和性能[J]. 材料研究学报, 2008, 22(4): 379-383.
, , , . [J]. Chin J Mater Res, 2008, 22(4): 379-383.

全文: PDF(767 KB)  
摘要: 用直流电弧等离子法蒸发Co-B非晶合金, 以Co-B非晶合金靶材, 制备了BN包裹Co和少量CoB合金的纳米颗粒, 用高分辨电镜、 X--Ray衍射及选区电子衍射和光致发光光谱及红外光谱对其进行了表征. 结果表明, 所制备的纳米颗粒是一种具有核壳结构的纳米胶囊, 尺寸为10-100 nm, 核由Co和少量CoB合金组成, 壳是厚度为3-5 nm的BN; Co/CoB作为催化剂在蒸发时促使B与N反应, 生成BN包覆在其表面形成纳米胶囊. 壳核结构能防止纳米Co颗粒的氧化和团聚. 这种纳米胶囊的饱和磁化强度为63.16 Am2/kg, 矫顽力为23.16 kA/m. 其矫顽力比相应的块体材料提高的主要原因, 是颗粒尺寸变小和多畴粒子畴壁的钉扎作用.
关键词 无机非金属材料电弧法纳米胶囊    
Key words
收稿日期: 2007-12-10     
ZTFLH:  O482  
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