scholarly journals Enhanced Soft Magnetic Properties of Iron-Based Powder Cores with Co-Existence of Fe3O4–MnZnFe2O4 Nanoparticles

Metals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 702 ◽  
Author(s):  
Yuye Xie ◽  
Pengfei Yan ◽  
Biao Yan
Keyword(s):  
Magnetic Properties ◽  
Core Loss ◽  
Magnetic Composite ◽  
Powder Metallurgy Method ◽  
Soft Magnetic Properties ◽  
Soft Magnetic ◽  
Soft Magnetic Composite ◽  
Insulation Coating ◽  
Iron Based ◽  
Microstructure And Magnetic Properties

An iron-based soft magnetic composite with Fe3O4-MnZnFe2O4 insulation coating has been prepared by powder metallurgy method. This work investigated the microstructure and magnetic properties of Fe/Fe3O4-MnZnFe2O4 powder cores. Scanning electron microscopy (SEM) coupled with an energy dispersive spectrometry (EDS) analysis indicated that the Fe3O4 and MnZnFe2O4 nanoparticles were uniformly coated on the surface of Fe powders. The co-existence of Fe3O4 and MnZnFe2O4 contributes to the preferable distribution of nano-sized insulation powders and excellent soft magnetic properties of soft magnetic composite (SMC) with high saturation magnetization Ms (215 A·m2/kg), low core loss (178.7 W/kg measured at 100 kHz, 50 mT), and high effective amplitude permeability of 114 (measured at 100 kHz). Overall, this work has great potential for realizing low core loss and outstanding soft magnetic properties of Fe-based powder cores.

Influence of Heat Treatment Processing on the Magnetic Properties of Fe-3.5Si Soft Magnetic Composites in Material Application

2012 ◽  
Vol 578 ◽  
pp. 206-210
Author(s):  
Yuan Dong Peng ◽  
Zhi Yue Sun ◽  
Jun Wu Nie ◽  
Wen Jun Zhang ◽  
Zeng Guang Mao ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Magnetic Properties ◽  
Core Loss ◽  
Treatment Temperature ◽  
Magnetic Composite ◽  
Soft Magnetic ◽  
Magnetic Composites ◽  
The Core ◽  
Soft Magnetic Composite ◽  
Eddy Loss

In this paper, the effect of heat treatment processing on magnetic properties of Fe-3.5Si soft magnetic composite has been investigated. The thermal treatment improved the magnetic properties of Fe-3.5Si SMC materials. With the treatment temperature increasing, the permeability and eddy loss of the composites increase and the core loss and hysteresis loss decrease. The magnetic properties would be deteriorated at too high temperature. Annealed temperature at 750°C for 60min, the Fe-3.5Si soft magnetic composite has the optimum overall magnetic properties.

scholarly journals APPLICATIONS OF UV-LIGA AND GRAYSCALE LITHOGRAPHY FOR DISPLAY TECHNOLOGIES

Doklady BGUIR ◽  
2019 ◽  
pp. 81-87
Author(s):  
I. V. Timoshkov ◽  
A. V. Khanko ◽  
V. I. Kurmashev ◽  
D. V. Grapov ◽  
A. A. Kastevich ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Cost Effective ◽  
Magnetic Composite ◽  
Soft Magnetic Properties ◽  
Soft Magnetic ◽  
Soft Magnetic Composite ◽  
Soft Magnetic Alloys ◽  
Conductive Substrate ◽  
Display Technology ◽  
Pros And Cons

In the article MEMS technologies for display production and application presented. UV-LIGA and greyscale lithography based on SU-8 resist approaches were shown. Methods, technologies and structures of heterogeneous materials with soft magnetic properties, pros and cons are discussed. Unique specific parameters of soft magnetic composite material were achieved: magnetic induction of saturation – 2,1 Т, working frequency range – up to 1 MHz, permeability – up to 3000, total loss – 8 W/kg, Curie temperature – above 800 ºС. Electroplating allows deposition of soft magnetic alloys on the conductive substrate. Metals like Fe, Ni, Co with additives like B, P were used to get the best soft magnetic properties. Special codeposition process was developed to allow insertion of soft magnetic composite powder filaments into soft magnetic matrix formed during. It allows developing magnetic micromotors for display production. Simulation of the hybrid step micromotors was carried out in Ansys Maxwell 19. It was demonstrated that it is possible to get 10 mN m tourqe under 25 μm rotor-stator air gap. Only presented microtechnologies can provide such accuracy of the mciromotors elements. As for greyscale photolithography, special grey mask were developed and it was demonstrated the possibility to produce controllable real 3D relief on the SU-8 photoresist. Thus, microtechnologies should be integrated into display technology to provide cost effective production and advanced properties of final products.

Magnetic properties of Fe-based soft magnetic composite with insulation coating by resin bonded Ni-Zn ferrite nanofibres

2019 ◽  
Vol 485 ◽  
pp. 1-7 ◽  
Author(s):  
Zuzana Birčáková ◽  
Ján Füzer ◽  
Peter Kollár ◽  
Magdalena Streckova ◽  
Juraj Szabó ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetic Composite ◽  
Soft Magnetic ◽  
Soft Magnetic Composite ◽  
Zn Ferrite ◽  
Insulation Coating

Microstructure and Magnetic Properties of Fe-Si-Al Soft Magnetic Composite

2013 ◽  
Vol 683 ◽  
pp. 7-10
Author(s):  
Yuan Dong Peng ◽  
Jian Ma ◽  
Wen Jun Zhang ◽  
Chong Xi Bao ◽  
Jun Wu Nie ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Aluminum Oxide ◽  
Magnetic Permeability ◽  
Magnetic Composite ◽  
Soft Magnetic ◽  
Insulating Layer ◽  
Soft Magnetic Composite ◽  
Powder Particles ◽  
Microstructure And Magnetic Properties

In this paper, the Fe-9Si-6Al soft magnetic composite has been prepared via powder particles coated with aluminum oxide and silicone. The magnetic properties and microstructure of Fe-Si-Al SMC has been investigated. Results showed that the powder particles surface contained a thin insulating layer made of aluminum oxide and silicone. After annealed at 800°C for 60min, the particles of component are all by themselves and the insulating layer is not destroyed. The Fe-Si-Al SMC has excellent magnetic properties. The magnetic permeability is steady with the frequency changing at 5kHz-100kHz range.

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