Preparation and electromagnetic properties of La-doped barium-ferrite/polythiophene composites

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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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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Electromagnetic properties of photodefinable barium ferrite polymer composites

AIP Advances ◽

10.1063/1.4891936 ◽

2014 ◽

Vol 4 (7) ◽

pp. 077136 ◽

Cited By ~ 8

Author(s):

Olusegun Sholiyi ◽

Jaejin Lee ◽

John D. Williams

Keyword(s):

Polymer Composites ◽

Barium Ferrite ◽

Electromagnetic Properties

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Preparation and Electromagnetic Properties of Ni-Co Coated W-type Barium Ferrite Hollow Microspheres

Proceedings of the 2016 2nd International Conference on Advances in Energy, Environment and Chemical Engineering (AEECE 2016) ◽

10.2991/aeece-16.2016.40 ◽

2016 ◽

Author(s):

Zhiguang Li ◽

Jianjiang Wang ◽

Weijuan Mi ◽

Liang Yu

Keyword(s):

Barium Ferrite ◽

Hollow Microspheres ◽

Electromagnetic Properties

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Pr3+-substituted W-type barium ferrite: Preparation and electromagnetic properties

Journal of Magnetism and Magnetic Materials ◽

10.1016/j.jmmm.2011.08.054 ◽

2012 ◽

Vol 324 (4) ◽

pp. 616-621 ◽

Cited By ~ 36

Author(s):

Yanfei Wu ◽

Ying Huang ◽

Lei Niu ◽

Yinling Zhang ◽

Yuqing Li ◽

...

Keyword(s):

Barium Ferrite ◽

Electromagnetic Properties

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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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