Electromagnetic Properties of W – Hexaferrites Composites with Magnetic Texture

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1040.29 ◽

2014 ◽

Vol 1040 ◽

pp. 29-33 ◽

Cited By ~ 1

Author(s):

Dmitry V. Wagner ◽

Olga Dotsenko ◽

Olga A. Ulyanova

Keyword(s):

Composite Materials ◽

Magnetic Materials ◽

Barium Ferrite ◽

Polymer Materials ◽

Electromagnetic Properties ◽

Frequency Range ◽

Magnetic Texture

In this article the possibility of production of composite materials with magnetic texture are discussed. For texturing of magnetic polymer materials the device was made. The W-type hexaferrites were synthesized using a standard ceramic technique. Magnetic materials with a texture based on barium ferrite were obtained. The electromagnetic properties of texture and non texture composites were measured in microwave. It was shown, that imaginary permeability of an isotropic sample 1.3 times more that sample with texture in a frequency range of 0.5 – 4 GHz.

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Microwave Composite Absorbers Based on Barium Hexaferrite/Carbon Nanotubes for 0.01-18 GHz Applications

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.685.553 ◽

2016 ◽

Vol 685 ◽

pp. 553-557 ◽

Cited By ~ 3

Author(s):

Olga A. Dotsenko ◽

Kirill O. Frolov

Keyword(s):

Carbon Nanotubes ◽

Composite Materials ◽

Magnetic Materials ◽

Barium Ferrite ◽

Barium Hexaferrite ◽

Electromagnetic Properties ◽

Microwave Frequencies ◽

New Era ◽

Barium Hexaferrites ◽

Multilayer Composites

Nano- and microstructured composite materials have opened a new era for multifunctional materials. In particular, barium hexaferrites and carbon nanotubes can be applied in order to improve electromagnetic properties in composites. Magnetic materials with a texture based on barium ferrite and carbon nanotubes were obtained. The electromagnetic properties of Z – hexaferrites / carbon nanotubes composites were measured at microwave frequencies. It was shown, that imaginary permeability of barium hexaferrites/carbon nanotubes multilayer composites with double texture is as much as that of an isotropic samples at regions 3.4 – 8.5 GHz and 7.1 – 11.6 GHz.

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Magnetic Properties of Manganese-Titanium Substituted Barium Ferrite Ba(TiMn)xFe12-2xO19(x=0.0, 0.5, 1.0, 1.5, 2.0) Prepared by the Molten Salt Method

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.434-435.240 ◽

2010 ◽

Vol 434-435 ◽

pp. 240-243 ◽

Cited By ~ 2

Author(s):

Hai Feng Li ◽

Rong Zhou Gong ◽

Hao Luo ◽

Jun Zhou ◽

Li Ren Fan ◽

...

Keyword(s):

Hysteresis Loop ◽

Molten Salt ◽

Barium Ferrite ◽

Magnetic Hysteresis ◽

Magnetic Hysteresis Loop ◽

Electromagnetic Properties ◽

Molten Salt Method ◽

Frequency Range ◽

X Ray Diffraction ◽

X Ray

M-type hexaferrites Ba(TiMn)xFe12-2xO19 (x=0 to 2) powders were synthesized by molten salt method. X-ray diffraction, scanning electron microscope and vibrating sample magnetometer were used to analyze the structures and electromagnetic properties. The results showed that, the magnetoplumbite structures for all samples were formed. Magnetic hysteresis loop measurements of the Ba(TiMn)xFe12-2xO19, exhibitted that the saturation magnetization (Ms), the remanent magnetization (Mr) and the coercitivity (Hc) of compounds depended strongly on the chemical composition of materials. The maxium values of Ms (52.68emu/g) and Mr (32.89emu/g) of the compounds were found at x=0.5; however, the values of Hc and the areas of magnetic hysteresis loop of compounds decreased with increasing the value of x. The Ba(TiMn)1.5Fe9O19/paraffin wax composites containing 40vol% of doped barium ferrite exhibitted good absorption performances in the frequency range of 2–14 GHz.

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Preparation and Electromagnetic Properties of Manganese Zinc Ferrite/Barium Ferrite Composite Materials

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.519.215 ◽

2012 ◽

Vol 519 ◽

pp. 215-219

Author(s):

Quan Yuan ◽

Wang Qun ◽

Zhi Xue Qu ◽

Zi Xin Gu ◽

Tong Wu

Keyword(s):

Composite Materials ◽

Barium Ferrite ◽

Zinc Ferrite ◽

Spinel Phase ◽

Electromagnetic Properties ◽

X Ray Diffraction ◽

Sem Images ◽

X Ray ◽

Manganese Zinc ◽

Manganese Zinc Ferrite

Abstract: Manganese zinc ferrite/barium ferrite composite materials were prepared with various content of Z type barium ferrite (0, 10, 20 wt%) using solid state reaction method. The effect of the compositon on the microstructure and electromagnetic properties of the composites are investigated by means of X-ray diffraction, scanning electron microscope and impedance analyzer. The X-ray diffraction patterns reveal that W phase of barium ferrite instead of Z phase appears in the composite sintered as well as the spinel phase. Some small hexagonal grains were observed in the SEM images and the proportion increases with increasing content of barium ferrite. The cut-off frequencies of the composite systematically shift towards high frequency from 2.5 MHz to 32.6 MHz which is attributed to the increasing of W phase. The composites show a higher frequency for the maximum of the impedance as well as a higher value of the impedance at certain frequency which may be benefit for the application at GHz frequency range.

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Hybrid Nd-Fe-B/barium ferrite magnetic materials with epoxy matrix

Hemijska industrija ◽

10.2298/hemind111104098s ◽

2012 ◽

Vol 66 (3) ◽

pp. 301-308 ◽

Cited By ~ 5

Author(s):

Aleksandar Stajcic ◽

Jasna Stajic-Trosic ◽

Aleksandar Grujic ◽

Mirko Stijepovic ◽

Nada Lazic ◽

...

Keyword(s):

Composite Materials ◽

Magnetic Materials ◽

Barium Ferrite ◽

Magnetic Particles ◽

Magnetic Energy ◽

Hybrid Composites ◽

Hysteresis Loops ◽

Mechanical Analysis ◽

Homogeneous Distribution ◽

Dynamic Mechanical

Lately a great attention has been paid to the research of bonded hybrid composites with improved dynamic mechanical capacities capable of replacing bonded Nd-Fe-B magnetic materials, by using the cheaper (ferrite) materials instead of the Nd-Fe-B powder while retaining the satisfying values of the maximal magnetic energy. The objective of this study is to assess how different contents of Nd-Fe-B and/or barium ferrite particles can affect morphological, dynamic mechanical and magnetic properties of bonded composite materials. The interactions between employed magnetic powders and the interactions between magnetic powders and polymer binder are considered. For the examination of the magnetic behaviour, a vibrating sample magnetometer (VSM) is used. Different shapes and sizes of the obtained hysteresis loops are used for comparison and prediction of the polymer bonded materials properties. The homogeneous distribution of the magnetic particles in the polymer matrix is validated using the scanning electron microscope (SEM). The elastic and damping behaviour examined by the dynamic mechanical analysis (DMA) show improved properties for hybrid composite materials.

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Hybrid polymer composite materials. Part 2. Preparation technology

All the materials Encyclopedic Reference Book ◽

10.31044/1994-6260-2020-0-1-8-13 ◽

2020 ◽

pp. 8-13

Keyword(s):

Composite Materials ◽

Impact Toughness ◽

Polymer Composites ◽

The Other ◽

Polymer Materials ◽

Hybrid Polymer ◽

Preparation Technology ◽

Advantages And Disadvantages ◽

Hybrid Polymer Composite ◽

The One

The main methods (pressing and winding) of the processing of hybrid polymer composites to obtain items were examined. Advantages and disadvantages of the methods were noted. Good combinations of different-module fibers (carbon, glass, boron, organic) in hybrid polymer materials are described, which allow one to prepare materials with high compression strength on the one hand, and to increase fracture energy of samples and impact toughness on the other hand.

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Synthesis of Si-based KH560/RGO@Fe3O4 composite for improving electromagnetic properties in 2–18 GHz frequency range

Journal of Materials Science Materials in Electronics ◽

10.1007/s10854-018-0433-y ◽

2018 ◽

Vol 30 (2) ◽

pp. 1626-1636 ◽

Cited By ~ 2

Author(s):

Yuexuan Li ◽

Yugang Duan

Keyword(s):

Electromagnetic Properties ◽

Frequency Range

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Modelling natural electromagnetic interference in man-made conductors for space weather applications

Annales Geophysicae ◽

10.5194/angeo-34-427-2016 ◽

2016 ◽

Vol 34 (4) ◽

pp. 427-436 ◽

Cited By ~ 2

Author(s):

Larisa Trichtchenko

Keyword(s):

Exact Solution ◽

Space Weather ◽

Electromagnetic Interference ◽

Geomagnetic Storms ◽

Electromagnetic Properties ◽

Electromagnetic Response ◽

Frequency Range ◽

Geomagnetically Induced Currents ◽

Geomagnetic Variations ◽

Wide Range

Abstract. Power transmission lines above the ground, cables and pipelines in the ground and under the sea, and in general all man-made long grounded conductors are exposed to the variations of the natural electromagnetic field. The resulting currents in the networks (commonly named geomagnetically induced currents, GIC), are produced by the conductive and/or inductive coupling and can compromise or even disrupt system operations and, in extreme cases, cause power blackouts, railway signalling mis-operation, or interfere with pipeline corrosion protection systems. To properly model the GIC in order to mitigate their impacts it is necessary to know the frequency dependence of the response of these systems to the geomagnetic variations which naturally span a wide frequency range. For that, the general equations of the electromagnetic induction in a multi-layered infinitely long cylinder (representing cable, power line wire, rail or pipeline) embedded in uniform media have been solved utilising methods widely used in geophysics. The derived electromagnetic fields and currents include the effects of the electromagnetic properties of each layer and of the different types of the surrounding media. This exact solution then has been used to examine the electromagnetic response of particular samples of long conducting structures to the external electromagnetic wave for a wide range of frequencies. Because the exact solution has a rather complicated structure, simple approximate analytical formulas have been proposed, analysed and compared with the results from the exact model. These approximate formulas show good coincidence in the frequency range spanning from geomagnetic storms (less than mHz) to pulsations (mHz to Hz) to atmospherics (kHz) and above, and can be recommended for use in space weather applications.

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Short Carbon Fibers Composites With High Filler Contents Rheology and Mechanical Properties

10.1115/imece1999-1200 ◽

1999 ◽

Author(s):

Y. Schmitt ◽

C. Paulick ◽

Y. Bour ◽

F. X. Royer

Keyword(s):

Mechanical Properties ◽

Composite Materials ◽

Tensile Test ◽

Carbon Fibers ◽

Polymer Materials ◽

Complex Geometries ◽

Small Ratio ◽

The Matrix ◽

Short Carbon

Abstract The control of the quality of mixture based on very short carbon fibers and epoxyde resins leads to suitable mixture for molding of complex geometries. A gain in fluidity is obtained if the suspensions are treated by ultrasounds and simultaneously stirred under vacuum. Addition in a very small ratio of microbubbles in the mixture allows to obtain a viscosity less than those of the matrix alone. For many polymer materials the gain of fluidity can be of 20 to 25% with size and concentration of the microspheres thoroughly chosen. A certain number of new resins is developped to elaborate composite materials with specific mechanical properties close to standard aluminium. Tensile test an ultimate stress are used to quantify the improvements of the mechanical properties. Fillers concentrations up to 30 % are obtained.

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