Development of Ni-Zn-Co Ferrite for High Frequency Application
碩士 === 大同大學 === 材料工程研究所 === 91 === It is well known that the Ni-Zn ferrites have good magnetic properties at high frequency. In order to enhance the anisotropy of the material, cobalt ions were added that may stabilize the domain walls and hence extend the application frequency. In this...
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ndltd-TW-091TTU001590242015-10-13T13:36:00Z http://ndltd.ncl.edu.tw/handle/32843486427978510192 Development of Ni-Zn-Co Ferrite for High Frequency Application 高頻用鎳鋅鈷鐵氧磁體開發研究 Cheng-Yao Cheng 鄭鉦耀 碩士 大同大學 材料工程研究所 91 It is well known that the Ni-Zn ferrites have good magnetic properties at high frequency. In order to enhance the anisotropy of the material, cobalt ions were added that may stabilize the domain walls and hence extend the application frequency. In this study, Ni-Zn ferrites with the composition (Ni1-xZnx)1-yCoy+δFe2-δO4 were prepared through conventional ceramic processing methods. The magnetic properties were measured, such as, μ’-f curves、μ”-f curves、saturation magnetizations (Ms) , and microstructures. The results showed that the μ’ was decreased and the resonance frequency was increased with increasing the cobalt ion content. On the other hand, the μ’ was increased and the resonance frequency was lowered with increasing the sintering temperature and the sintering time. Thus, by doping the cobalt ions is an effective way in the manufacturing of ferrite materials for high frequency applications. The content of cobalt ions and sintering processes would be fine tuned in order to match the applications of the Ni-Zn ferrites. Wan-Yi Wei 魏萬益 2003 學位論文 ; thesis 121 en_US |
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碩士 === 大同大學 === 材料工程研究所 === 91 === It is well known that the Ni-Zn ferrites have good magnetic properties at high frequency. In order to enhance the anisotropy of the material, cobalt ions were added that may stabilize the domain walls and hence extend the application frequency. In this study, Ni-Zn ferrites with the composition (Ni1-xZnx)1-yCoy+δFe2-δO4 were prepared through conventional ceramic processing methods. The magnetic properties were measured, such as, μ’-f curves、μ”-f curves、saturation magnetizations (Ms) , and microstructures. The results showed that the μ’ was decreased and the resonance frequency was increased with increasing the cobalt ion content. On the other hand, the μ’ was increased and the resonance frequency was lowered with increasing the sintering temperature and the sintering time. Thus, by doping the cobalt ions is an effective way in the manufacturing of ferrite materials for high frequency applications. The content of cobalt ions and sintering processes would be fine tuned in order to match the applications of the Ni-Zn ferrites.
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author2 |
Wan-Yi Wei |
author_facet |
Wan-Yi Wei Cheng-Yao Cheng 鄭鉦耀 |
author |
Cheng-Yao Cheng 鄭鉦耀 |
spellingShingle |
Cheng-Yao Cheng 鄭鉦耀 Development of Ni-Zn-Co Ferrite for High Frequency Application |
author_sort |
Cheng-Yao Cheng |
title |
Development of Ni-Zn-Co Ferrite for High Frequency Application |
title_short |
Development of Ni-Zn-Co Ferrite for High Frequency Application |
title_full |
Development of Ni-Zn-Co Ferrite for High Frequency Application |
title_fullStr |
Development of Ni-Zn-Co Ferrite for High Frequency Application |
title_full_unstemmed |
Development of Ni-Zn-Co Ferrite for High Frequency Application |
title_sort |
development of ni-zn-co ferrite for high frequency application |
publishDate |
2003 |
url |
http://ndltd.ncl.edu.tw/handle/32843486427978510192 |
work_keys_str_mv |
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