| 超细六角铁酸钡的分散与磁场下成型研究 |
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| 引用本文： | 王梦瑜.超细六角铁酸钡的分散与磁场下成型研究[J].安徽教育学院学报,2011,29(3):26-31. |
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| 作者姓名： | 王梦瑜 |
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| 作者单位： | 杜兰大学物理学院; |
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| 摘 要： | 本文采用溶胶凝胶自燃烧法制备了粒径在200~300nm的单相六角铁酸钡粉体,并对其进行球磨,外加PEG-20000为分散剂,调节料浆的pH值等手段对六角铁酸钡磁性颗粒进行分散,研究表明球磨过程中磁性颗粒经历了团聚后打开,然后有形成诸如磁链、磁环等磁结构的过程。对六角铁酸钡进行干压（未加磁场和加磁场）以及磁场下悬浮-沉降等工艺成型,经过压力和磁场的作用得到的块材沿易磁化方向具有一定的取向。磁性测试结果表明：球磨前后的粉体比磁化强度（1.5T）从40.3emu/g上升到了51.5emu/g,这个数值接近铁酸钡单晶磁化强度,矫顽力从4.1kOe小幅度提高到4.3kOe。悬浮-沉降成型比磁化强度（1.0T）就达到了48.4emu/g,而矫顽力有明显下降。
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| 关 键 词： | 六角铁酸钡 分散 磁场成型 |
Research on Dispersion and Molding in Magnetic Field of Ultrafine Hexagonal Barium Ferrite Powders |
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| WANG Meng-yu.Research on Dispersion and Molding in Magnetic Field of Ultrafine Hexagonal Barium Ferrite Powders[J].Journal of Anhui Institute of Education,2011,29(3):26-31. |
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| Authors: | WANG Meng-yu |
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| Institution: | WANG Meng-yu(Tulane University,New Orleans LA,US) |
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| Abstract: | Ultrafine M-BaFe12O19 powders with high phase purity were synthesized through sol-gel auto-combustion process,which have an average particle size of 200~300nm.Surfactant-assisted(PEG-20000) ball milling of BaFe12O19 ferrite dispersion,with adjusting the PH of the slurry,indicates that the aggregate particles in the slurry disperse and then form a chain or circle.The slurry with pH=4,PEG which is 10% of the slurry and 8~10 hours of ball milling,shows a relatively fine dispersion.With dry-press and suspension... |
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| Keywords: | hexagonal barium ferrite dispersion molding in magnetic field |
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