| 引用本文: | 王佳敏,甘章华,朱昭峰,吴传栋,鲁越辉,丁景楠.纳米晶合金粉芯的超重力渗流制备及磁性能[J].材料科学与工艺,2024,32(1):34-41.DOI:10.11951/j.issn.1005-0299.20220386. |
| WANG Jiamin,GAN Zhanghua,ZHU Zhaofeng,WU Chuandong,LU Yuehui,DING Jingnan.Super-gravity percolation process of nanocrystalline alloy powder cores and magnetic properties[J].Materials Science and Technology,2024,32(1):34-41.DOI:10.11951/j.issn.1005-0299.20220386. |
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| 纳米晶合金粉芯的超重力渗流制备及磁性能 |
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王佳敏1,甘章华1,朱昭峰2,吴传栋1,鲁越辉1,丁景楠1
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(1.省部共建耐火材料与冶金国家重点实验室(武汉科技大学),武汉 430081;2.江苏奥玛德新材料科技有限公司,江苏 盐城 224000)
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| 摘要: |
| 为了探索粉芯的新制备工艺,以Fe73.5Cu1Nb3Si13.5B9纳米晶合金铁芯为原料,使用机械破碎法制粉,并采用超重力渗流工艺制备了7种不同粒度配比的纳米晶合金粉芯,借助SEM、XRD、VSM分别对纳米晶粉末的形貌、结构和磁性能进行了表征,研究了粉末粒度配比对纳米晶合金粉芯的形貌、密度、有效磁导率、损耗及品质因数的影响。结果表明,机械破碎法制得的粉末虽带尖角,但矫顽力低,利用超重力渗流工艺制备的粉芯其粉末表面基本被树脂完全包覆。同时,通过适当的粉末粒度匹配,发现性能最佳粉芯的粉末粒度配比为:100~200目占60%,200~400目占20%,400~1 000目占20%。该种粉芯的密度为4.46 gcm3,在100~3 000 kHz频率范围内有效磁导率比较稳定,且在3 000 kHz时为28.2。当设定磁感应强度为20 mT,频率为500 kHz时,其损耗为99.1 W/kg。另外,根据实验结果可知,该工艺能够制备出频率在MHz以上具有较低损耗的粉芯。 |
| 关键词: Fe73.5Cu1Nb3Si13.5B9纳米晶合金 粉芯 超重力渗流 粒度配比 有效磁导率 粉芯损耗 |
| DOI：10.11951/j.issn.1005-0299.20220386 |
| 分类号:TG132.2+71 |
| 文献标识码:A |
| 基金项目:国家自然科学基金资助项目(51904213)；湖北省创新群体项目(2021CFA023). |
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| Super-gravity percolation process of nanocrystalline alloy powder cores and magnetic properties |
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WANG Jiamin1, GAN Zhanghua1, ZHU Zhaofeng2, WU Chuandong1, LU Yuehui1, DING Jingnan1
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(1.State Key Laboratory of Refractories and Metallurgy(Wuhan University of Science and Technology), Wuhan 430081, China; 2. Jiangsu Aomad New Material Technology Co., Ltd., Yancheng 224000, China)
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| Abstract: |
| To explore a new preparation process of powder cores, Fe73.5Cu1Nb3Si13.5B9 nanocrystalline alloy cores were used as raw material and powdered by mechanical crushing method. Subsequently, seven kinds of nanocrystalline alloy powder cores with different particle size ratios were prepared by super-gravity percolation process. The morphology, structure, and magnetic properties of powder were characterized by SEM, XRD, and VSM, respectively. And the effect of particle size ratio on the morphology, density, effective permeability, core loss and quality factor of powder cores were studied. The results show that the powder prepared by mechanical crushing has low coercivity despite its sharp corners, and the powder surface of powder cores prepared by super-gravity percolation process are essentially solely covered by resin. Moreover, with proper particle size ratio, it is found that the best performance of the powder core’s particle size ratio is: 100~200 mesh powder accounting for 60%, 200~400 mesh powder accounting for 20%, 400~1 000 mesh powder accounting for 20%. The density of the core is 4.46 gcm3 and the effective permeability is relatively stable in the frequency range from 100 kHz to 3 000 kHz, reaching 28.2 at 3 000 kHz. The core loss is only 99.1 Wkg at the magnetic induction strength of 20 mT and the frequency of 500 kHz. Furthermore, this process can produce low-loss powder cores at frequencies above MHz according to the experiment results. |
| Key words: Fe73.5Cu1Nb3Si13.5B9 nanocrystalline alloy powder cores super-gravity percolation process particle size ratio effective permeability core loss |
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