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| Magnetic Properties of Nanocrystalline Powder Cores Using Mechanically Crushed Powders |
| Chun-bo HUANG1,2,Tian-cheng LIU1,2,Xiang-yue WANG1,2,Cao-wei LU1,2,De-ren LI1,2,Zhi-chao LU1,2 |
1. China Iron and Steel Research Institute Group, Beijing 100081, China
2. R&D Center of Advanced Technology and Materials Co. , Ltd. , Beijing 100081, China |
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Abstract Toroidal shape FeCuNbSiB nanocrystalline alloy powder cores were prepared by cold pressing using mechanically crushed and ball-milled powders, respectively. The morphologies and their effects on the magnetic properties of the compacted cores were investigated. Compared with ball-milled powders, mechanically crushed ones have more regular shapes and rounder edges, which lead to better inter-particle insulation. FeCuNbSiB nanocrystalline alloy powder cores fabricated from mechanically crushed powders exhibit remarkably lower core loss of about 248. 2 kW/m3 at 100 kHz for maximum flux density Bm=0. 1 T, and more stable permeability up to 10 MHz. Moreover, the dc-bias property could be improved significantly using mechanically crushed powders.
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Received: 11 September 2012
Published: 19 March 2014
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| Fund:National Hi-Tech Research and Development Program |
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2014, Vol. 21 
