Enhanced soft magnetic properties of Fe-based amorphous powder cores by longitude magnetic field annealing
Enhanced soft magnetic properties of Fe-based amorphous powder cores by longitude magnetic field annealing
复制标题
纵向磁场退火增强铁基非晶磁粉芯的软磁性能
DOI：
10.1016/j.jallcom.2017.02.202
复制
发表时间：
2017-06-05
影响因子：
6.2
通讯作者：
Wang, Xin-Min
中科院分区：
文献类型：
--
作者：
Li, Zichao;Dong, Yaqiang;Wang, Xin-Min
研究了经磁场退火对fe基Fe78Si9B13非晶粉芯软磁性能的影响。粉末铁芯在经度磁场下退火后，磁性能发生较大变化。随着磁场强度的增大，退火粉末铁心的磁导率进一步增大。在外加磁场为30 Oe、温度为400℃的条件下，经经磁场退火后，磁芯的有效磁导率提高了66，这是由于内应力的消除和原子结构的改变。磁导率提高了8%，FeSiB非晶粉芯的频率稳定性高达2 MHz。与零场处理相比，随着磁场强度的增加，铁芯损耗明显降低，直流偏置特性基本保持不变。对于粉末铁芯，在50 mT和100 kHz时，铁芯损耗为90 ~ 180 W/kg，在100 Oe时，直流偏置性能达到70%以上。本研究为提高Fe78Si9B13粉末铁芯的磁导率提供了新的途径，也验证了粉末铁芯在不同纹波电流、不同负载和宽频率范围（10 kHz-2 MHz）工作条件下的应用前景。(C) 2017 Elsevier B.V.版权所有
The longitude magnetic field annealing on the soft magnetic properties of Fe-based Fe78Si9B13 amorphous powder cores were investigated. The magnetic properties of powder core greatly change when annealed under longitude magnetic field. With the increase of magnetic field intensity, the permeability of annealed powder core further increase. The core shows an enhanced effective magnetic permeability of 66 after longitude magnetic field annealing at an applied field of 30 Oe and temperature of 400 degrees C, which is attributed to the relief of internal stress and the variation of atomic structure. The permeability was improved by 8% and the frequency stability of FeSiB amorphous powder core is up to 2 MHz. The core loss decreases obviously and DC bias property stays at a same level compared with zero field treatment with the increase of magnetic field intensity. For the powder cores, the core loss ranges from 90 to 180 W/kg at 50 mT and 100 kHz, and DC bias property reaches over 70% at 100 Oe. This work provides a novel approach to improve permeability for Fe78Si9B13 powder cores and also validates the application prospect of powder core in the work condition of different ripple currents, different loads and a wide frequency range (10 kHz-2 MHz). (C) 2017 Elsevier B.V. All rights reserved.