Controllable SiO2 coating layer of FeSiBPNb amorphous powder cores with excellent soft magnetic properties

Huangkeyu; Yaqiang Dong; 刘珉; 任继行; 鲁书含; 赵占奎; ChuntaoChang; XinminWang

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钢铁研究学报（英文版） ›› 2018, Vol. 25 ›› Issue (6) : 624-629.

Controllable SiO2 coating layer of FeSiBPNb amorphous powder cores with excellent soft magnetic properties

Ke-yu Huang^1,2 . Ya-qiang Dong² . Min Liu² . Ji-hang Ren¹ . Shu-han Lu¹ . Zhan-kui Zhao¹ . Chun-tao Chang² . Xin-min Wang²

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Controllable SiO2 coating layer of FeSiBPNb amorphous powder cores with excellent soft magnetic properties

Ke-yu Huang^1,2 . Ya-qiang Dong² . Min Liu² . Ji-hang Ren¹ . Shu-han Lu¹ . Zhan-kui Zhao¹ . Chun-tao Chang² . Xin-min Wang²

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摘要

Abstract: Amorphous powder cores based on spherical (Fe0.76Si0.09B0.1P0.05)99Nb1 amorphous powder and their SiO2 layer prepared by in situ coating insulation process were investigated in detail. These cores were characterized by scanning electron microscopy and X-ray diffraction analyses, and the results revealed that the surface layer of the amorphous powder was composed of SiO2 with uniform surface coverage. The thickness of the SiO2 insulating layer could be controlled by adjusting the tetraethyl orthosilicate (TEOS) content. By cold-pressing with epoxy resin under a pressure of 1800 MPa, a ring powder core with an outer diameter of 20.3 mm, inner diameter of 12.7 mm, and height of 5.3 mm was prepared. The FeSiBPNb composite core showed its best properties when the TEOS content was 2 mL/g (the volume of TEOS for each gram of (Fe0.76Si0.09B0.1P0.05)99Nb1 amorphous powder, mL/g), which showed good relative permeability in the high-frequency range of up to 10 MHz and a low core loss of 320 W/kg under the maximum magnetic .ux density of 0.1 T and frequency of 100 kHz.

Abstract

关键词

SMCs / Core loss / Permeability / In situ / Amorphous

Key words

SMCs / Core loss / Permeability / In situ / Amorphous

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Huangkeyu, Yaqiang Dong, 刘珉, 等. Controllable SiO2 coating layer of FeSiBPNb amorphous powder cores with excellent soft magnetic properties[J]. 钢铁研究学报（英文版）, 2018, 25(6): 624-629

KE-YU, YAQIANG -Dong, LIU Min, et al. Controllable SiO2 coating layer of FeSiBPNb amorphous powder cores with excellent soft magnetic properties[J]. Journal of Iron and Steel Research International, 2018, 25(6): 624-629

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基金

National Key Research and Development Program of China;National Natural Science Foundation of China;Ningbo Municipal Nature Science Foundation;Zhejiang Province Public Technology Research and Industrial Projects;Ningbo International Cooperation Projects