| 纳米铁/SiO2核壳复合粒子的制备与性能表征 |
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| 引用本文： | 高国华,官建国,何玲燕,包建.纳米铁/SiO2核壳复合粒子的制备与性能表征[J].武汉理工大学学报,2004,26(9):1-3. |
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| 作者姓名： | 高国华 官建国 何玲燕 包建 |
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| 作者单位： | 武汉理工大学材料复合新技术国家重点实验室,武汉,430070 |
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| 基金项目： | 国家“8 6 3”计划 (2 0 0 1AA3390 2 0和 2 0 0 2 AA30 5 30 2 )，教育部优秀青年教师资助计划 |
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| 摘 要： | 利用硅烷偶联剂 APS和活性硅作表面活性剂 ,采用种子包埋法 ,制备了纳米铁 / Si O2 核壳复合粒子。用 TEM、TG- DTA、VSM对材料结构与性能进行表征。TG- DTA表明纳米铁表面没有吸附水和结晶水 ,而抗氧化能力提高。VSM研究发现包裹一层二氧化硅后 ,饱和磁化强度与剩磁对比纳米铁粉减小 ,而矫顽力增大
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| 关 键 词： | 核壳复合粒子 种子包埋法 磁性能 铁纳米粒子 二氧化硅 |
| 文章编号： | 1671-4431(2004)09-0001-03 |
| 修稿时间： | 2004年5月16日 |
Preparation and Properties of Silica-coated Iron Nanoparticles |
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| GAO Guo-hua,GUAN Jian-guo,HE Ling-yan,BAO Jian.Preparation and Properties of Silica-coated Iron Nanoparticles[J].Journal of Wuhan University of Technology,2004,26(9):1-3. |
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| Authors: | GAO Guo-hua GUAN Jian-guo HE Ling-yan BAO Jian |
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| Abstract: | The Nano-SiO 2-coated-iron composite powder was prepared by the seeded growth process with 3-aminopropyl-trimethoxysilane (APS) and active silica as surfactant. The composite powder was characterized by the differential scanning calorimetry-thermogravimetry (DSC-TG), transmission electron microscope (TEM), vibrating sample magnetometry (VSM). No absorbing water and crystal water were found in the composite powder by DSC-TG. The silicate was uniformly coated on the surfaces of nano-iron particles by TEM observations. The results of VSM showed after coating the saturation magnetization and remnant magnetization decrease, while the coercive increases. |
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| Keywords: | core-shell seeded growth process magnetic properties nano iron particles silica |
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