Ningbo in iron-based nanocrystalline soft magnetic alloy material research has made new progress

Date：2015-11-04 09:23:00 Hits：

As electronic device miniaturization, high saturation magnetic induction intensity) and the implementation of the national energy conservation and emissions reduction policy (low loss), research and development at the same time with high saturation magnetic induction intensity and low loss of the new type of iron-based nanocrystalline soft magnetic alloys are becoming increasingly important. For nanocrystalline soft magnetic materials, to improve the alloy saturated magnetic induction intensity, to try to increase iron content, and the corresponding decrease in the alloy elements on the ferromagnetic metals. However, these kind of metal elements content in reducing lead to nanocrystalline alloy precursor (amorphous) of amorphous formation ability drop, making it difficult for the preparation of amorphous strip, and lead to the deterioration of soft magnetic properties. Therefore, an urgent need to develop a preparation technology is simple and soft magnetic performance of the new type of iron-based nanocrystalline alloy.

Ningbo materials technology and engineering research institute of the Chinese academy of sciences Shen Baolong team in early discovery with high saturation magnetic induction intensity and good soft magnetic FeSiBPCu alloy, based on the performance of the alloy composition and nano crystallization process for further optimization, developed with more excellent performance of FeSiBPCu nanocrystalline soft magnetic alloys. Nano grain size of the alloy is 15 nm, microstructure of tem images as shown in figure 1. Its saturated magnetic induction intensity is 1.8 T, already close to silicon steel, coercive force of only 1.1 A/m (see figure 2), and the iron loss is far lower than the silicon steel, under the condition of power frequency (50 hz, 1 T) of the iron loss is 0.22 W/kg, respectively is oriented silicon steel (0.64 W/kg) of A third, no loss oriented silicon steel (2.0 W/kg) of one 9 (see figure 3). Excellent comprehensive performance is expected to be applied to distribution transformer of the motor and switch power supply, etc. Research results obtained have independent intellectual property rights.

The relevant content of this study for Magnetism and Magnetic material in the 56th session of international Conference (56 th Annual Conference on Magnetism and Magnetic Materials, Phoenix, USA) on the report, is highly evaluated by the attendees. Relevant papers published in the Journal of Applied Physics (111, 07 a311, 2012). The paper at the same time be Virtual Journal of Nanoscale Science & Technology.

This study by the national 863 plan (863 aa03z214) of national outstanding youth science fund (50825103), national natural science foundation of China (51001112), and the Chinese academy of sciences, one hundred plan (KGCX - 2 - YW - 803).