Electromagnetic Parameters Model and Microwave Absorption for Composite Coatings Containing Magnetic Particles

2009 ◽  
Vol 26 (5) ◽  
pp. 057701 ◽  
Author(s):  
Huang Yao-Qing ◽  
Hou Zhi-Ling ◽  
Song Wei-Li ◽  
Yuan Jie ◽  
Cao Mao-Sheng
Keyword(s):  
Microwave Absorption ◽  
Magnetic Particles ◽  
Composite Coatings ◽  
Electromagnetic Parameters

Synthesis, Characterization, and Microwave Absorption Properties of SrFe12O19 Ferrites and FeNi3 Nanoplatelets Composites

2010 ◽  
Vol 148-149 ◽  
pp. 893-896 ◽  
Author(s):  
Ze Yang Zhang ◽  
Xiang Xuan Liu ◽  
You Peng Wu
Keyword(s):  
Electron Microscopy ◽  
Microwave Absorption ◽  
Composite Coatings ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
Absorption Properties ◽  
Filling Fraction ◽  
Microwave Absorption Properties ◽  
Phase Reduction ◽  
Transmission Electron

M-typical SrFe12O19 ferrites and FeNi3 nanoplatelets were successfully prepared by the sol-gel method and solution phase reduction method, respectively. The crystalline and morphology of particles were studied by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). The composite coatings with SrFe12O19 ferrites and FeNi3 nanoplatelets in polyvinylchloride matrix were prepared. The microwave absorption properties of these coatings were investigated in 2-18GHz frequency range. The results showed that the M-typical SrFe12O19 ferrites and FeNi3 nanoplatelets were obtained and they presented irregular sheet shapes. With the increase of the coating thickness, the absorbing peak value moves to the lower frequency. The absorbing peak values of the wave increase along with the increasing of the content of FeNi3 nanoplatelets filling fraction. When 40% SrFe12O19 ferrites is doped with 20% mass fraction FeNi3 nanoplatelets to prepare composite with 1.5mm thickness, the maximum reflection loss is -24.8 dB at 7.9GHz and the -10 dB bandwidth reaches 3.2GHz.

Development of Multi-Layer Zinc Oxide-Iron Composite Coatings for Microwave Absorption

2014 ◽  
Vol 20 (7) ◽  
pp. 1490-1494 ◽  
Author(s):  
M. Najim ◽  
P. Smitha ◽  
V. Agarwala ◽  
D. Singh
Keyword(s):  
Zinc Oxide ◽  
Microwave Absorption ◽  
Composite Coatings

Representation Methods for Microwave Absorption Ceramics

2011 ◽  
Vol 492 ◽  
pp. 176-179 ◽  
Author(s):  
Zhao Yang Zeng ◽  
Heng Liu ◽  
Ming Lu
Keyword(s):  
Microwave Absorption ◽  
Distinct Difference ◽  
Electromagnetic Parameters ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
The Difference

Two methods are widely used to represent the microwave absorption properties of ceramics: measuring the values of electromagnetic parameters such as permeability and permittivity, or directly measuring the reflection rate of a metal-backed slab sample made of this material. However, do these two methods coincide with each other? If not, which method should be used as right way to represent this kind of ceramics? To answer these questions, both methods are carried out on the same ceramics, of which the results are compared. Distinct difference between these measured results is found, and the possible reasons for the difference are also discussed.

Preparation and Electromagnetic Property of Hexagonal W-Type Ferrite Obtained by the Sol-Gel Method

2011 ◽  
Vol 474-476 ◽  
pp. 1044-1048
Author(s):  
Zheng Xiong ◽  
Zhu Xi ◽  
Zhang Li Jun
Keyword(s):  
Microwave Absorption ◽  
Reflection Loss ◽  
Sol Gel ◽  
Electromagnetic Property ◽  
Element Composition ◽  
Vector Network Analyzer ◽  
Network Analyzer ◽  
Electromagnetic Parameters ◽  
Gel Method ◽  
Sol Gel Method

Hexagonal W-type ferrite BaZn0.6Co1.4Fe16O27 was prepared by the sol-gel method. The formation, microstructure, element composition and phases were analyzed by TG-DTA, SEM, EDS and XRD. The electromagnetic parameters and microwave absorption capability were measured by the microwave vector network analyzer. The results showed that the reflection loss of the ferrite BaZn0.6Co1.4Fe16O27 in the spectrum of 8-18GHz came up to -10dB and came up to -20dB in the spectrum of 9.5-16.4GHz.

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