| 纳米SiO2对功率铁氧体材料磁性能的影响 |
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| 引用本文： | 聂建华,冯则坤,谭福清,何华辉.纳米SiO2对功率铁氧体材料磁性能的影响[J].华中科技大学学报(自然科学版),2003,31(6):23-25. |
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| 作者姓名： | 聂建华 冯则坤 谭福清 何华辉 |
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| 作者单位： | 1. 华中科技大学,电子科学与技术系
2. 江门市粉末冶金厂有限公司 |
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| 摘 要： | 研究了添加纳米SiO2对MnZn功率铁氧体材料磁性能的影响，并用AES和SEM对功率铁氧体材料的微结构和晶界进行了研究，结果表明晶界电阻率和功率损耗依赖于纳米SiO2加入量，加入的纳米SiO2量有一个最佳值．加入适量的纳米SiO2有助于降低MnZn功率铁氧体的功率损耗，其原因在于Si原子阻止了Nb原子和Ca原子进入铁氧体材料的晶格，与Nb原子和Ca原子一起富集到铁氧体材料的晶界处，形成具有高电阻率的晶界层，降低了铁氧体材料的涡流损耗．
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| 关 键 词： | 纳米Si02 功率铁氧体 晶界 微结构 |
| 文章编号： | 1671-4512(2003)06-0023-03 |
| 修稿时间： | 2002年12月6日 |
Effect of nanosize SiO2 on the magnetic properties of the MnZn power ferrites |
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| Nie Jianhua,Feng Zekun,Tan Fuqing,He Huahui.Effect of nanosize SiO2 on the magnetic properties of the MnZn power ferrites[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,2003,31(6):23-25. |
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| Authors: | Nie Jianhua Feng Zekun Tan Fuqing He Huahui |
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| Institution: | Nie Jianhua Feng Zekun Tan Fuqing He Huahui |
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| Abstract: | The effect of nanosize SiO 2 addition on the power l os s in the manganese zinc ferrite was investigated. The microstructure and grain b oundary of MnZn ferrites were observed by AES and SEM. The results showed that t he grain boundary resistivity and power loss were dependent upon the content of nanosize SiO 2. An optimum content of nanosize SiO 2 existed to produce unifor m grain structure. Proper content of nanosize SiO 2 was useful for the power to reduce the loss of ferrite. The Si atoms prevented Ca and Nb atoms from being i ncorporated within the spinel lattice, and gathered in the grain boundaries with Ca and Nb atoms together to form a grain boundaries layer with high resistivity . The eddy current loss of the ferrite was reduced. |
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| Keywords: | nanosize SiO 2 power ferrite grain bound ary microstructure |
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