Influence of Compaction Pressure on Magnetic Properties of Sendust Powder Core

2016 ◽  
Vol 852 ◽  
pp. 79-83
Author(s):  
Ru Wu Wang ◽  
Feng Quan Zhang ◽  
Ding Wei ◽  
Ze Min Fang ◽  
Chun Zeng ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Alloy Powder ◽  
Power Loss ◽  
Effective Permeability ◽  
Annealing Temperature ◽  
Compaction Pressure ◽  
Magnetic Powder ◽  
Soft Magnetic ◽  
Dc Bias ◽  
Quality Factor Q

Toroid-shaped soft magnetic powder cores (SMCs) were produced by cold pressing of the commercial sendust alloy powders. The characteristics of the commercial sendust alloy powder and the effect of compaction pressure on the magnetic properties, i.e., effective permeability μe, quality factor Q, DC-bias properties and volume power loss of sendust alloy powder cores were investigated. The results showed that the sendust alloy powder core with shaping pressure of 1932 MPa, annealing temperature of 953 K for 1 h and dielectric content of 0.96% presents the optimum magnetic properties with an effective permeability of 90, a total loss of 386 mW/cm3 at f=50 kHz and Bm=0.1 T, a DC-bias property of 64% at H=50 Oe.

Research on Preparation and Properties of Fe-Si-Al Soft Magnetic Composites

2011 ◽  
Vol 298 ◽  
pp. 173-178 ◽  
Author(s):  
Qing Da Li ◽  
X.W. Dong ◽  
T.X. Liu ◽  
Jun Hua You ◽  
Fa Zeng Lian
Keyword(s):  
Magnetic Properties ◽  
Effective Permeability ◽  
Annealing Temperature ◽  
Total Loss ◽  
Magnetic Powder ◽  
Soft Magnetic ◽  
Magnetic Composites ◽  
Crushing Strength ◽  
Soft Magnetic Composites ◽  
Magnetic Powder Core

The Fe-Si-Al soft magnetic composites were produced by cold pressing of water-atomized Fe-Si-Al powder using organic binder. The effect of shaping pressure, annealing temperature, magnetic annealing and dielectric content on properties of Fe-Si-Al soft magnetic composites was investigated. The results showed that increasing shaping pressure increases density and radial crushing strength of Fe-Si-Al soft magnetic cores, and decreases coercivity and total loss. Increasing annealing temperature can increase effective permeability and decrease total loss owing to decreasing hysteresis loss, and over-annealing (＞660°C) can deteriorate magnetic properties. The magnetic annealing can decrease total loss of Fe-Si-Al magnetic powder core. Increasing dielectric content can reduce the eddy current loss of Fe-Si-Al magnetic powder core and decrease the real part of permeability. Fe-Si-Al magnetic powder core with shaping pressure of 1800 MPa, annealing temperature of 660 °C and dielelctric content of 0.7% presented the optimum magnetic properties with an effective permeability of 127, a total loss of 78mW/cm3 and a radial crushing strength of 18MPa.

Effect of Annealing Temperature on the Soft Magnetic Behavior of Sendust Powder Core

2014 ◽  
Vol 556-562 ◽  
pp. 6-10 ◽  
Author(s):  
Ding Wei ◽  
Xian Wang ◽  
Ze Kun Feng ◽  
Rong Zhou Gong
Keyword(s):  
Quality Factor ◽  
Effective Permeability ◽  
Annealing Temperature ◽  
Inorganic Salt ◽  
Magnetic Behavior ◽  
Soft Magnetic ◽  
High Quality ◽  
Insulating Layer ◽  
Al Powder ◽  
Quality Factor Q

The variation of soft magnetic properties of Sendust powder cores as a function of annealing temperature has been investigated. Toroid-shaped Sendust powder cores were prepared from Fe-Si-Al powder by machine pulverizing and subsequent cold pressing using inorganic insulating layer and organic binders, respectively. The influence of different compaction pressures and various annealing temperature on effective permeability and quality factor was investigated. Sendust powder cores using inorganic salt as insulating layer exhibit high effective permeability ( μe>110) up to 1 MHz, showing excellent frequency stable characteristics and high quality factor (Q>80) at 50 kHz. The optimized annealing temperature is 953K.

Influence of Insulating Compounds Addition on Magnetic Properties of FeSi Cores

2013 ◽  
Vol 320 ◽  
pp. 7-10
Author(s):  
Xiao Hui Zhu ◽  
Min Nie ◽  
Hai Ming Bai
Keyword(s):  
Magnetic Properties ◽  
Power Loss ◽  
Effective Permeability ◽  
Dc Bias

The process of preparation of Fe-Si cores is studied, and the influence of different amounts of insulating compounds addition on magnetic properties of the cores is discussed. The results show that the effective permeability is 71.4 when the amount of insulation is 0.5 wt%. When the content is increased to 2.5 wt%, the DC Bias characteristic becomes the best. When the insulating compounds addition is 2.5 wt%, the sample has the lowest power loss, which is 308.4 mW/cm3 at f=50 kHz and B=50 mT.

Influence of Alloying Additions on Enhancement of Soft Magnetic Properties Effect and Crystallization in FeXSiB (X=Cu, V, Co, Zr, Nb) Amorphous Alloys

2007 ◽  
Vol 130 ◽  
pp. 171-174 ◽  
Author(s):  
Z. Stokłosa ◽  
G. Badura ◽  
P. Kwapuliński ◽  
Józef Rasek ◽  
G. Haneczok ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Amorphous Alloys ◽  
Crystallization Process ◽  
Annealing Temperature ◽  
Magnetic Measurements ◽  
X Ray Diffraction ◽  
Soft Magnetic ◽  
X Ray ◽  
Second Stage ◽  
Transmission Electron

The crystallization and optimization of magnetic properties effects in FeXSiB (X=Cu, V, Co, Zr, Nb) amorphous alloys were studied by applying X-ray diffraction methods, high resolution transmission electron microscopy (HRTEM), resistometric and magnetic measurements. The temperatures of the first and the second stage of crystallization, the 1h optimization annealing temperature and the Curie temperature were determined for different amorphous alloys. Activation energies of crystallization process were obtained by applying the Kissinger method. The influence of alloy additions on optimization effect and crystallization processes was carefully examined.

scholarly journals Strategy to Enhance Magnetic Properties of Fe78Si9B13 Amorphous Powder Cores in the Industrial Condition

Metals ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 381 ◽  
Author(s):  
Haibo Sun ◽  
Ce Wang ◽  
Weihong Chen ◽  
Jiexin Lin
Keyword(s):  
Particle Size ◽  
Magnetic Properties ◽  
Effective Permeability ◽  
Industrial Condition ◽  
Collaborative Optimization ◽  
Molding Pressure ◽  
Process Conditions ◽  
Soft Magnetic Properties ◽  
Soft Magnetic ◽  
Coating Agent

In this study, the soft magnetic properties of Fe78Si9B13 amorphous magnetic powder cores (AMPCs) were enhanced by coordinately adjusting the technological parameters, including the particle size distribution, molding pressure, and coating agent content, in the industrial condition. The results show that the optimized comprehensive soft magnetic properties of the Fe78Si9B13 AMPCs could be obtained under the following process conditions: (1) the distribution of particle size is 20 wt.% for 140–170 mesh, 70 wt.% for 170–270 mesh, and 10 wt.% for 270–400 mesh; (2) the molding pressure is in the range of 2.35–2.45 GPa; and (3) the additive amount of sodium silicate is 1.5 wt.%. After the collaborative optimization, the AMPCs’ compact density, ρ, the effective permeability, μe, and the residual effective permeability at the applied magnetizing field of 7.96 kA/m, μ[email protected] kA/m, increased from 5.61 g/cm3 to 5.86 g/cm3, from 58.13 to 77.01, and from 40.36 to 49.57, respectively. The attenuation ratio of the effective permeability, when in the frequency band of 20–100 kHz, was less than 0.85%. The core loss at the 50 kHz for the maximum magnetic flux density of 0.1 T reduced from 380.85 mW/cm3 to 335.23 mW/cm3. This work will encourage the further application of Fe-based AMPCs in the fields of electronics and telecommunication.

EFFECT OF ANNEALING TEMPERATURE ON THE STRUCTURE AND AC MAGNETIC PROPERTIES OF Fe73Cu1Nb3.5-xVxSi13.5B9 (x = 1.0, 1.5, 2.0) NANOCRYSTALLINE SOFT MAGNETIC ALLOYS

2013 ◽  
Vol 27 (19) ◽  
pp. 1341013
Author(s):  
WEI LU ◽  
PING HUANG ◽  
YUXIN WANG ◽  
BIAO YAN
Keyword(s):  
Magnetic Properties ◽  
Strong Influence ◽  
Annealing Temperature ◽  
Iron Loss ◽  
Soft Magnetic ◽  
Magnetic Alloys ◽  
Annealing Temperatures ◽  
Grain Sizes ◽  
Soft Magnetic Alloys ◽  
Nanocrystalline Soft Magnetic Alloys

In this paper, Nb element was partially replaced by V element in Finemet-type Fe 73 Cu 1 Nb 3.5-x V x Si 13.5 B 9 (x = 1, 1.5, 2) alloys and the effect of annealing temperatures on the microstructure and AC magnetic properties of the samples are studied. The annealing temperatures affect the grain sizes of the bcc α- Fe phase greatly. When the annealing temperature is between 540–560°C, the samples have better AC magnetic properties than the samples annealed at other temperatures. The optimized annealing temperature of the studied samples is around 560°C. The coercivity and iron loss of the V2 sample is a little bit higher than that of V1 and V1.5 alloys while the amplitude permeability of V2 alloy is larger than that of V1 and V1.5, which indicate that the content of V element has strong influence on the magnetic properties of nanocrystalline soft magnetic alloys.

Influence of The Alloy Composition on The Magnetic Properties of Nanocrystalline Fe80M7B12Cu1 (M: Ti, Ta, Nb, Mo)

1999 ◽  
Vol 577 ◽  
Author(s):  
M. Kopcewicz ◽  
A. Grabias ◽  
B. Idzikowski
Keyword(s):  
Magnetic Properties ◽  
Annealing Temperature ◽  
Alloy Composition ◽  
Anisotropy Field ◽  
Nanocrystalline Phase ◽  
Soft Magnetic Properties ◽  
Soft Magnetic ◽  
Scanning Calorimetry ◽  
Rf Magnetic Field ◽  
Collapse Effect

ABSTRACTFormation of the nanocrystalline bcc Fe phase due to thermal treatment of the amorphous Fe80M7B12Cu1 (M: Ti, Ta, Nb, Mo) precursors is studied by the Mössbauer and differential scanning calorimetry techniques. The dependence of the formation of the bcc Fe phase on the alloy composition is discussed. In order to determine the optimal soft magnetic properties of these nanocrystalline alloys the rf-Mössbauer technique is used in which rf collapse effect induced by a radio-frequency (rf) magnetic field is employed. It was found that anisotropy fields in the nanocrystalline phase were smaller in Nb- and Mo-containing alloys as compared to the alloys which contain Ti or Ta. Variations of the anisotropy field vs. alloy composition and annealing temperature are discussed in detail.

Sign in / Sign up

Export Citation Format

Share Document