Influence of particle size distribution on magnetic properties of nanocrystalline soft magnetic Fe/sub 86/Zr/sub 7/Cu/sub 1/B/sub 6/

2000 ◽  
Vol 36 (5) ◽  
pp. 3430-3432 ◽  
Author(s):  
F.C.S. da Silva ◽  
M. Knobel ◽  
D. Ugarte ◽  
D. Zanchet
Keyword(s):  
Particle Size ◽  
Magnetic Properties ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Soft Magnetic

scholarly journals Properties of Fe-based nanocrystalline magnetic powder cores (MPC) and structure of particle size distribution (PSD)

2018 ◽  
Vol 69 (2) ◽  
pp. 163-169
Author(s):  
Dominik Grybos ◽  
Jacek S. Leszczynski ◽  
Marcin Kwiecień ◽  
Cezary Swieboda ◽  
Patryk Lasak ◽  
...  
Keyword(s):  
Particle Size ◽  
Magnetic Properties ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Coarse Particles ◽  
Magnetic Powder ◽  
Mass Ratio ◽  
Soft Magnetic ◽  
Induction Components ◽  
Permeability Increase

Abstract This paper discusses the influence of the Particle Size Distribution (PSD) of the nanocrystalline Fe-based granular-soft-magnetic material on the final magnetic properties of a Magnetic Powder Core (MPC). Here we show how PSD impacts the final magnetic properties. Mixing fine and coarse particles, with a dominance of coarse particles, significantly influences the magnetic permeability increase of the core. Better magnetic features are noted for MPCs constructed with certain mass ratio of fine and coarse particles due to improvement in the magnetic path in the cores. This allows to offer new induction components to industry.

Scalable Production of Carbon Encapsulated Ni Nanoparticles by Water Arc Discharge: Structural and Magnetic Properties

2005 ◽  
Vol 23 ◽  
pp. 87-90 ◽  
Author(s):  
K.H. Ang ◽  
I. Alexandrou ◽  
N.D. Mathur ◽  
R. Lacerda ◽  
I.Y.Y. Bu ◽  
...  
Keyword(s):  
Particle Size ◽  
Magnetic Properties ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Arc Discharge ◽  
Narrow Particle Size Distribution ◽  
Ni Nanoparticles ◽  
X Ray Diffraction ◽  
Transmission Electron ◽  
Water Container

An electric arc discharge in de-ionised water between a solid graphite cathode and an anode made by compressing Ni and C containing powders in a mass ratio of Ni:C = 7:3 was used here to prepare carbon encapsulated Ni nanoparticles in the form of powder suspended in water. The morphology of the produced material was analysed using high resolution transmission electron microscopy (HRTEM) and X-ray diffraction (XRD). The magnetic properties of the samples were determined using a Princeton vibrating sample magnetometer (VSM). Collection of the powder produced from different depths in the water container has proved to be an effective method for obtaining samples with narrow particle size distribution. Further material purification by dry NH4 plasma etching was used to remove the amorphous carbon content of the samples. XRD and HRTEM analysis showed that the material synthesized is fcc Ni particles with mean particle size ranging from 14 to 30 nm encapsulated in 2 to 5 graphitic cages. The data suggests that the process reported has the ability to mass-produce carbon encapsulated ferromagnetic nanoparticles with desired particle size distribution, and hence with controlled size-dependent magnetic properties.

scholarly journals Determination Of Power Loss In Fe-Based Soft Magnetic Composites

2015 ◽  
Vol 60 (2) ◽  
pp. 1411-1415 ◽  
Author(s):  
B. Jankowski ◽  
D. Kapelski ◽  
B. Ślusarek ◽  
J. Szczygłowski
Keyword(s):  
Particle Size ◽  
Magnetic Properties ◽  
Composite Materials ◽  
Particle Size Distribution ◽  
Power Loss ◽  
Particle Sizes ◽  
Soft Magnetic ◽  
Magnetic Composites ◽  
Soft Magnetic Composites

Abstract The magnetic properties of Fe-based composite materials with different particle sizes were investigated. The results of energy loss density were obtained from measurements of the static (DC) hysteresis cycles ranging from 0,2 to 1,4 T. In turn, the results of power loss density were obtained from measurements of the dynamic (AC) hysteresis cycles ranging from 20 to 400 Hz and at the maximum flux density 0,3; 0,9 and 1,3 T. Two sets of specimens was analyzed in the investigation: the specimens compacted under pressure of 800 MPa and hardened at 500°C and the specimens compacted under different pressure and hardened at 500°C. Specimens of the second set had the same density. The study confirmed the influence of particle size distribution on magnetic properties of Fe-based soft magnetic composites.

Effect of particle size distribution on the structure, hyperfine, and magnetic properties of Ni0.5Zn0.5Fe2O4 nanopowders

2014 ◽  
Vol 116 (23) ◽  
pp. 233907 ◽  
Author(s):  
Kaustav Bhattacharjee ◽  
Satya P. Pati ◽  
G. C. Das ◽  
D. Das ◽  
K. K. Chattopadhyay
Keyword(s):  
Particle Size ◽  
Magnetic Properties ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Effect Of Particle Size

scholarly journals Fe-6.5 wt%Si Powder Cores with Low Core Loss by Optimizing Particle Size Distribution

Metals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1699
Author(s):  
JianJun Huang ◽  
Lixin Jiao ◽  
Yu Yang ◽  
Yaqiang Dong ◽  
Yiqun Zhang ◽  
...  
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Effective Permeability ◽  
Fine Particles ◽  
Core Loss ◽  
Eddy Current Loss ◽  
Magnetic Powder ◽  
Soft Magnetic ◽  
Separation Density

The effect of different particle size distribution of Fe-6.5 wt%Si powder on the microstructure and soft magnetic properties of the corresponding soft magnetic powder cores (SMPCs) was investigated. By optimizing particle size distribution, the density of SMPCs increased and the total core loss significantly decreased. According to the result of loss separation, density of SMPCs is inversely proportional to hysteresis loss, while with increasing the content of the fine particles, the eddy current loss significantly decreased. It was found that with magnetic powder of particle size-grading as 10%, 10%, 60%, and 20% for particles with size between −75 to +38, −38 to +23, −23 to +13, and −13 μm, respectively, the Fe-6.5 wt%Si SMPCs exhibit optimal comprehensive magnetic performances with the effective permeability of about 60, the percent permeability at 100 Oe is up to 70%, and the lowest core loss of 553 mW/cm3.

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