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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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SmCo5纳米颗粒和纳米薄片的制备、结构和磁性能
DOI: 10.3724/SP.J.1037.2011.00643, PP. 475-479
Keywords: SmCo5,纳米颗粒,纳米薄片,表面活性剂,高能球磨,磁性能
Abstract:
采用表面活性剂增强高能球磨技术及颗粒清洗、分级筛选工艺,制备了具有较高矫顽力、颗粒尺寸分布狭窄的SmCo5纳米颗粒与纳米薄片,利用XRD,SEM,TEM,激光粒径分析(LPSA)和振动样品磁强计(VSM)等手段分别对其相结构、微观形貌、颗粒尺寸分布及磁性能进行了表征.结果表明,平均颗粒尺寸分别为9.8和47.5nm的SmCo5纳米颗粒,其室温矫顽力分别为6.8×10$4和7.3×105A/m;SmCo5纳米薄片的平均颗粒尺寸为1.4μm,平均厚度为75nm,具有明显的c轴织构和较强的磁各向异性,其难磁化轴和易磁化轴上的室温矫顽力分别可达5.5×105和1.6×106A/m;SmCo5纳米颗粒和纳米薄片的矫顽力表现出显著的颗粒尺寸依赖性.
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