Process optimization of high-performance soft magnetic composite based on phosphate and bismaleimide coated iron powders

被引：0
|
作者：
Yu H. [1 ,2 ,3 ]
Guan S. [2 ,3 ]
Li J. [1 ]
Liu Z. [2 ,3 ]
Guo B. [1 ,2 ,3 ]
Chen R. [1 ]
机构：
[1] Dongguan Mentech Optical & Magnetic Co., Ltd., Dongguan
[2] School of Materials Science and Engineering, South China University of Technology, Guangzhou
[3] South China Institute of Collaborative Innovation, Dongguan
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2023年 / 40卷 / 04期
关键词：
bismaleimide; heat resistance; magnetic loss; magnetic material; phosphate; soft magnetic core;
D O I：
10.13801/j.cnki.fhclxb.20220520.001
中图分类号：
学科分类号：
摘要：
Electronic devices are developing towards miniaturization, integration, and high frequency with the development of electronic industry. The soft magnetic cores require better loss characteristics and higher reliability becaues their magnetic properties would decline due to the sharply increased magnetic loss and serious heating with the high-frequency application. In this work, high-performance soft magnetic composites with phosphate-bismaleimide@Fe structure were prepared by phosphating treatment and bismaleimide (BMI) coating, and the effects of insulation coating methods on the reliability of soft magnetic composites were investigated. The results indicate that the excellent comprehensive magnetic properties of soft magnetic composites have been obtained as the content of BMI resin is 2wt% and the compaction pressure is 800 MPa, the effective permeability is 32.2, the total loss is 1 181 kW/m3 under the condition of 50 mT@200 kHz and the quality factor Q can reach 46.2 at 1 MHz. Moreover, it is found that the resin layer between iron powder particles can play a role of stress buffer to reduce the formation of internal stress and the total loss of soft magnetic composites. The aging of soft magnetic composites due to the oxidation of the magnetic powders which was proved by flourier infrared spectrum analysis. The phosphating treatment and BMI coating can effectively slow down the aging to improve the high-temperature reliability of soft magnetic composites and perform stable magnetic properties after long-term accelerated aging test at 180°C. © 2023 Beijing University of Aeronautics and Astronautics (BUAA). All rights reserved.
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页码：2216 / 2223
页数：7
相关论文
共 31 条
  • [1] WU Shen, LI Jiechao, WANG Xiaowei, Et al., Development of high-frequency low-loss soft magnetic composites, Journal of Light Industry, 35, 5, pp. 61-70, (2020)
  • [2] SHOKROLLAHI H, JANGHORBAN K., Soft magnetic composite materials (SMCs)[J], Journal of Materials Processing Technology, 189, 1-3, pp. 1-12, (2007)
  • [3] SUNDAY K J, TAHERI M L., Soft magnetic composites: Recent advancements in the technology[J], Metal Powder Report, 72, 6, pp. 425-429, (2017)
  • [4] PERIGO E A, WEIDENFELLER B, KOLLAR P, Et al., Past, present, and future of soft magnetic composites[J], Applied Physics Reviews, 5, (2018)
  • [5] SILVEYRA J M, FERRARA E, HUBER D L, Et al., Soft magnetic materials for a sustainable and electrified world[J], Science, 362, 6413, (2018)
  • [6] LI K, CHENG D, YU H, Et al., Process optimization and magnetic properties of soft magnetic composite cores based on phosphated and mixed resin coated Fe powders[J], Journal of Magnetism and Magnetic Materials, 501, (2020)
  • [7] PAN Y, QIAN L, WANG X, Et al., Hybrid phosphate-alumina iron-based core-shell soft magnetic composites fabricated by sol-gel method and ball milling method[J], Metals, 10, 2, (2020)
  • [8] HSIANG H, FAN L, HUNG J., Effects of the sodium stearate addition on the corrosion resistance and electromagnetic properties of phosphatized iron-based SMCs[J], Journal of Magnetism and Magnetic Materials, 490, (2019)
  • [9] TAGHVAEI A H, SHOKROLLAHI H, JANGHORBAN K, Et al., Eddy current and total power loss separation in the iron-phosphate-polyepoxy soft magnetic composites[J], Materials and Design, 30, 10, pp. 3989-3995, (2009)
  • [10] HUANG M, WU C, JIANG Y, Et al., Evolution of phosphate coatings during high-temperature annealing and its influence on the Fe and FeSiAl soft magnetic composites[J], Journal of Alloys and Compounds, 644, pp. 124-130, (2015)
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