| 掺杂SiO_2对FeCo纳米晶磁粉电磁性能的影响 |
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| 引用本文： | 庞永强,程海峰,唐耿平,邢欣.掺杂SiO_2对FeCo纳米晶磁粉电磁性能的影响[J].材料研究学报,2009(6). |
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| 作者姓名： | 庞永强 程海峰 唐耿平 邢欣 |
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| 作者单位： | 国防科技大学航天与材料工程学院重点实验室; |
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| 基金项目： | 国家自然科学基金50802114资助项目~~ |
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| 摘 要： | 用高能球磨法制备了掺杂SiO_2的FeCo纳米晶磁粉,用SEM、XRD等分析手段对纳米晶磁粉进行结构分析,研究了掺杂SiO_2对FeCo纳米晶磁粉/石蜡复合物复介电常数和复磁导率的影响.结果表明,杂质SiO_2主要以非晶态的形式存在于FeCo纳米晶颗粒中;与未掺杂SiO_2的FeCo纳米晶磁粉相比,在复磁导率变化很小的情况下,掺杂适量的SiO_2可显著降低纳米晶磁粉/石蜡复合物的复介电常数,可较好的解决吸波涂层设计中的阻抗匹配问题.
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| 关 键 词： | 金属材料 纳米晶磁粉 二氧化硅 复介电常数 复磁导率 |
Doping effect of SiO_2 on electromagnetic properties for FeCo nanocrystalline magnetic powders |
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| PANG Yongqiang CHENG Haifeng TANG Gengping XING Xin.Doping effect of SiO_2 on electromagnetic properties for FeCo nanocrystalline magnetic powders[J].Chinese Journal of Materials Research,2009(6). |
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| Authors: | PANG Yongqiang CHENG Haifeng TANG Gengping XING Xin |
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| Affiliation: | PANG Yongqiang CHENG Haifeng~(**) TANG Gengping XING Xin (Key Lab of School of Aerospace , Material Engineering,National University of Defense Technology,Changsha 410073) |
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| Abstract: | The FeCo/SiO_2 nanocrystalline magnetic powders were prepared from the mixtures of carboxyl iron,cobalt and SiO_2 powders by the simple ball-milling method.The microstructure was characterized by XRD and SEM.Doping effect on electromagnetic parameters was investigated by vector network analyzer for FeCo nanocrystalline magnetic powders doped with SiO_2.The results show that impurity of SiO_2 in the FeCo nanocrystalline exists in the form of amorphous phase and the doping can greatly modify the microwave ele... |
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| Keywords: | metallic materials nanocrystlline magnetic powders SiO_2 complex permittivity complex permeability |
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