scholarly journals Magnetic Mineral Nanocomposite Sorbents for Wastewater Treatment

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Oksana Makarchuk ◽  
Tetiana Dontsova ◽  
Anatolii Perekos ◽  
Alexander Skoblik ◽  
Yevhen Svystunov
Keyword(s):  
Aqueous Solution ◽  
Magnetic Separation ◽  
Clay Minerals ◽  
Soft Magnetic Materials ◽  
Magnetic Nanocomposites ◽  
Magnetic Composite ◽  
Soft Magnetic ◽  
Magnetic Composites ◽  
Adsorption Removal ◽  
Crystallite Sizes

Magnetic nanocomposite sorbents for disposal of synthetic detergents from wastewater were synthesized. Obtained sorbents based on clay minerals (saponite, palygorskite, and spondyle clay) and magnetite were characterized by X-ray powder diffraction, Mössbauer spectroscopy, and ballistic method with Steinberg magnetometer. As a result, the average crystallite sizes of Fe3O4 nanoparticles in magnetic nanocomposites were 2–10 nm. Magnetic nanocomposites had superparamagnetic properties and were classified as soft magnetic materials. Comparison of sorption properties showed that magnetic composite sorbents had efficiency of adsorption removal of anionic surfactants and polyphosphates from aqueous solution 2–8 times higher compared to native clay minerals. Spent magnetic nanocomposites were effectively removed from the aqueous solution by magnetic separation. So, the efficiency of magnetic composites application and implementing of magnetic separation in adsorption purification was confirmed.

scholarly journals Advances in Powder Metallurgy Soft Magnetic Composite Materials

2017 ◽  
Vol 62 (2) ◽  
pp. 1149-1154 ◽  
Author(s):  
R. Bureš ◽  
M. Strečková ◽  
M. Fáberová ◽  
P. Kollár ◽  
J. Füzer
Keyword(s):  
Powder Metallurgy ◽  
Magnetic Materials ◽  
Automotive Industry ◽  
Core Loss ◽  
Soft Magnetic Materials ◽  
Magnetic Composite ◽  
Transportation Industry ◽  
Soft Magnetic ◽  
Magnetic Composites ◽  
High Frequency Region

Abstract Powder metallurgy has grown with the expansion of various industry. Automotive industry had the most strong influence. Today, more than 90% of PM products are used in the transportation industry. Development of new materials such as magnetic materials is expected to meet the new trends of automotive industry, electric and hybrid vehicles. Soft magnetic composites (SMC) are PM materials based on ferromagnetic powder particles covered by electric insulation layer. Concept of SMC’s and PM technologies offer possibility to become faster, use higher frequencies, become smaller and denser, save more energy, achieving high permeability and lower core loss in high frequency region, which is required for soft magnetic materials. Investigation of correlations among compaction parameters, inner structure, magnetic and mechanical properties are presented.

scholarly journals Effect of the Temperature on the Magnetic and Energetic Properties of Soft Magnetic Composite Materials

Energies ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4400
Author(s):  
Luca Ferraris ◽  
Fausto Franchini ◽  
Emir Pošković ◽  
Marco Actis Grande ◽  
Róbert Bidulský
Keyword(s):  
Magnetic Materials ◽  
Eddy Currents ◽  
Electrical Machines ◽  
Soft Magnetic Materials ◽  
Magnetic Composite ◽  
Soft Magnetic ◽  
Soft Magnetic Composite ◽  
Magnetic Performance ◽  
Magnetic Circuits ◽  
Energetic Characterization

In recent years, innovative magnetic materials have been introduced in the field of electrical machines. In the ambit of soft magnetic materials, laminated steels guarantee good robustness and high magnetic performance but, in some high-frequency applications, can be replaced by Soft Magnetic Composite (SMC) materials. SMC materials allow us to reduce the eddy currents and to design innovative 3D magnetic circuits. In general, SMCs are characterized at room temperature, but as electrical machines operate at high temperature (around 100 °C), an investigation analysis of the temperature effect has been carried out on these materials; in particular, three SMC samples with different binder percentages and process parameters have been considered for magnetic and energetic characterization.

scholarly journals Temperature and Torque Measurements of Switched Reluctance Actuator with Composite or Laminated Magnetic Cores

Sensors ◽  
2020 ◽  
Vol 20 (11) ◽  
pp. 3065
Author(s):  
Marek Przybylski ◽  
Barbara Ślusarek ◽  
Paolo Di Barba ◽  
Maria Evelina Mognaschi ◽  
Sławomir Wiak
Keyword(s):  
Magnetic Flux Density ◽  
Magnetic Composite ◽  
Soft Magnetic ◽  
Magnetic Composites ◽  
Switched Reluctance ◽  
Loss Analysis ◽  
Steel Sheets ◽  
Soft Magnetic Composite ◽  
Torque Measurements ◽  
Lower Temperature

Soft magnetic composite (SMC) materials made of iron powder are more frequently used in construction of electric actuators and motors because of their advantages with respect to Fe–Si electric steel sheets and because they have almost no powder loss. The study deals with measurements of temperature and torque of a low-power rotary switched reluctance actuator, with reference to a commercial actuator and a prototype actuator characterized by stator and rotor cores made of soft magnetic composite materials. Further power loss analysis was also conducted. To assess the actuators, magnetization characteristics and iron loss vs. magnetic flux density at a given frequency were measured according to IEC standards. Results show that the actuator made of soft magnetic composites exhibits higher efficiency and a lower temperature rise of stator and windings in comparison with the commercial actuator.

Scaling algorithms in modelling of power loss in soft magnetic composites

2019 ◽  
Vol 38 (4) ◽  
pp. 1064-1074 ◽  
Author(s):  
Mariusz Najgebauer ◽  
Jan Szczyglowski ◽  
Barbara Slusarek ◽  
Marek Przybylski
Keyword(s):  
Power Loss ◽  
Measurement Data ◽  
Soft Magnetic Materials ◽  
Scaling Analysis ◽  
Soft Magnetic ◽  
Magnetic Composites ◽  
Content Type ◽  
Soft Magnetic Composites ◽  
Loss Modelling ◽  
Scaling Algorithms

Purpose The purpose of this paper is to examine scaling algorithms in the description and modelling of power loss in soft magnetic composites (SMCs). Design/methodology/approach Three scaling algorithms are examined to determine the most appropriate description of power loss in magnetic composites. The scaling coefficients are estimated in such a way that all measurement data should be collapsed onto a single curve, given in the scaled coordinates. The coefficient estimation is based on a non-linear optimization using the generalized reduced gradient method. The obtained formulae are then used in the power loss modelling. Findings It is revealed that only two-component formulae are suitable for the scaling analysis of power loss because these allow obtaining of the collapse of measurement data. Research limitations/implications This study considers just one type of SMC (Somaloy 700). Further research will be devoted to the verification of the scaling approach to the power loss modelling for other types of magnetic composites. Practical implications The power loss is a basic property of soft magnetic materials, which determines their practical applications. The scaling approach to the power loss modelling gives quite simple models that require a reduced number of measurement data to estimate coefficients. Originality/value The scaling algorithms can be a useful tool in the analysis and designing of magnetic circuits made of SMCs.

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.

Study of the Reproducibility of Ni-Zn Nanoferrite Obtained by Combustion Reaction

2014 ◽  
Vol 775-776 ◽  
pp. 415-420 ◽  
Author(s):  
Débora Albuquerque Vieira ◽  
Verônica Cristina Souza Diniz ◽  
Daniel R. Cornejo ◽  
Ana Cristina Figueiredo de Melo Costa ◽  
Ruth Herta Goldsmith Aliaga Kiminami
Keyword(s):  
Electron Microscopy ◽  
Combustion Synthesis ◽  
Soft Magnetic Materials ◽  
Spherical Particles ◽  
Magnetic Characteristics ◽  
X Ray Diffraction ◽  
Soft Magnetic ◽  
X Ray ◽  
Crystallite Sizes ◽  
Scanning Electron

This work involved a study of the reproducibility of the process of combustion synthesis to produce Ni-Zn ferrites. The structural, morphological and magnetic characteristics of the samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and magnetometry using an alternating gradient magnetometer (AGM). The XRD diffractograms of the samples indicated that they are monophasic, crystalline, with crystallite sizes ranging from 21 to 38 nm, and have a homogeneous morphology consisting of agglomerates of spherical particles. The samples behaved as soft magnetic materials, with magnetization levels ranging from 37 to 47 emug-1. The combustion synthesis was found to be efficient in producing Ni-Zn nanoferrites, yielding reproducible results.

scholarly journals Analysis of magnetic losses in Fe-polymer composites

2018 ◽  
Vol 69 (6) ◽  
pp. 454-457
Author(s):  
Mariusz Najgebauer ◽  
Adam Jakubas ◽  
Jan Szczygłowski
Keyword(s):  
Polymer Composites ◽  
Magnetic Materials ◽  
Electronic Devices ◽  
Soft Magnetic Materials ◽  
Magnetic Losses ◽  
Soft Magnetic ◽  
Magnetic Composites ◽  
Magnetic Cores ◽  
Maximum Induction ◽  
Soft Magnetic Composites

Abstract The most important properties of soft magnetic materials are peak induction and magnetic losses, determining the size and efficiency of electric devices. Conventional soft magnetic materials are not suitable for the construction of miniaturized magnetic cores. Soft magnetic composites meet miniaturization requirements of electric and electronic devices. In this paper, magnetic losses in self-developed Fe-polymer composites are analyzed. The frequency dependencies of magnetic losses are measured at different level of maximum induction. The influence of Fe-grain size on magnetic losses is also discussed.

scholarly journals Fe-Si/MnZn(Fe2O4)2 Core-shell Composites with Excellent Magnetic Properties by Mechanical Milling and Spark Plasma Sintering (SPS)

Metals ◽  
2018 ◽  
Vol 8 (7) ◽  
pp. 553 ◽  
Author(s):  
Liang Yan ◽  
Biao Yan
Keyword(s):  
Magnetic Properties ◽  
Spark Plasma Sintering ◽  
Mechanical Milling ◽  
Core Shell ◽  
Magnetic Composite ◽  
Soft Magnetic ◽  
Magnetic Composites ◽  
Plasma Sintering ◽  
Soft Magnetic Composites ◽  
Spark Plasma

The Fe-Si/MnZn(Fe2O4)2 composite powders are synthetized by means of the mechanical milling, and Fe-Si/MnZn(Fe2O4)2 soft magnetic composites are prepared by spark plasma sintering (SPS). The impact of milling time on particle size, phase structure and magnetic properties of the investigative core-shell structure powders along with that of sintering temperature on microstructure and magnetic properties of FeSi-MnZn(Fe2O4)2 soft magnetic composite are studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), and vibrating sample magnetometer (VSM). The experimental results demonstrate a layer of MnZn(Fe2O4)2 forming a coating on the surface of Fe-Si powder after mechanical milling, and the soft magnetic composites exhibiting excellent magnetic performance at 900 °C: 212.49 emu/g for saturation magnetization, with 6.89 Oe for coercivity, 3 × 10−4 Ω.m for electrical resistivity and stable amplitude permeability and low core loss over a wide frequency range. Therefore, SPS offers a convenient and swift way to enhance performance of soft magnetic composites using magnetic materials as insulting layer.

Improving induction tube welding system performance using soft magnetic composites

2019 ◽  
Vol 39 (1) ◽  
pp. 185-191
Author(s):  
Sean Michael Muyskens ◽  
Tareq Ibrahim Eddir ◽  
Robert Charles Goldstein
Keyword(s):  
Three Dimensional ◽  
Three Dimensions ◽  
Process Efficiency ◽  
Magnetic Composite ◽  
Soft Magnetic ◽  
Magnetic Composites ◽  
Content Type ◽  
Tube Welding ◽  
Electromagnetic Models ◽  
Welding System

Purpose This paper aims to demonstrate the benefits of using different impeder materials for induction tube welding systems. Design/methodology/approach To show the difference in using various impeder materials, a new approach was taken to model tube welding systems in two and three dimensions. Three-dimensional (3-D) electromagnetic models were used to determine the current distribution along the weld vee as well as the permeability of the tube along the length of the welding system. Two-dimensional (2-D) coupled electromagnetic plus thermal models with rotational movement were used to determine the temperature distribution in the heat-affected zone. Findings Simulation results suggest upwards of 25 per cent system power savings when using a soft magnetic composite (SMC) impeder rather than the traditional ferrites. Research limitations/implications There is currently a lack of experimental data to validate the models, but future work will include comparison of models to real-world trials. Practical implications When dealing with tube welding systems, there are possibilities to improve process efficiency or increase production quality and output by improving the impeder material. Originality/value While simulations of tube welding systems have been done previously, studies on improving impeder materials are rarely carried out. This paper brings to light possible improvements to be made to induction tube welding systems.

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