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Piezo-absorbing effect of microwave absorbing composites with carbonyl iron particles as the filler

  • Chengmao Zhang , Ting Liu and Yonggang Xu
Published/Copyright: October 15, 2015
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 106 Issue 10

Abstract

A new piezo-absorbing composite was fabricated with silicone rubber and spherical or flaky carbonyl iron particles (CIPs). The complex permittivity and permeability of the composites, under variable compressive strain, were measured using a vector network analyzer in the frequency of 2–18 GHz and the reflection loss (RL) calculated to test the piezo-absorbing effect. The results show that, under compressive strain, the complex permittivity decreased slightly because of the breakdown of the original conductive network, whereas the complex permeability increased, but the enhancement mechanism was different. In the case of spherical CIPs/rubber composite, this was caused by the surface effect of the absorbents, and in the case of flaky CIPs/rubber composite by the orientation of the flaky particles. As the compressive strain was applied, the RL value and the absorbing band changed slightly with thickness of 1 mm or 2 mm. As the applied strains decreased the thickness of the composites, the absorption band (RL < −10 dB) broadened and the minimum RL decreased.

Keywords: Smart materials; Magnetic properties; Electrical properties; Absorbing composites
*Correspondence address, Yonggang Xu, School of Mechanical Engineering and Automation, Beihang University, Beijing, 100191, China, Tel.: +861082339604, Fax: +861082316603, E-mail:

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Received: 2014-12-29
Accepted: 2015-05-20
Published Online: 2015-10-15
Published in Print: 2015-10-14

© 2015, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.111281
Keywords for this article
Smart materials; Magnetic properties; Electrical properties; Absorbing composites

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. On the widths of the hysteresis of mechanically and thermally induced martensitic transformations in Ni–Ti-based shape memory alloys
  5. The effects of external compressive stress on the kinetics of low temperature bainitic transformation and microstructure in a superbainite steel
  6. The effect of compressing pressure on the microstructure and properties of W-10 wt.% Cu composite
  7. Simulation of dendritic growth of Al-4 wt.% Cu alloy from an undercooled melt
  8. Effects of contact pressure and sliding distance on the lubricated friction and wear properties of Zn-25Al-3Cu alloy: A comparative study with SAE 65 bronze
  9. Electrochemical behaviour of stainless steel in acidic fluoride media
  10. Quick fabrication of appropriate morphology and composition CoFe films with desirable microwave properties
  11. Piezo-absorbing effect of microwave absorbing composites with carbonyl iron particles as the filler
  12. Nanocomposite based on polyaniline emeraldine-base and α-Al2O3: A structural characterization
  13. Effect of Cr3C2 content on the microstructure and properties of Mo2NiB2-based cermets
  14. Short Contributions
  15. Damage mechanisms in aluminum-matrix composites reinforced with nano-alumina particles
  16. Synthesis of ultrafine powder of vanadium carbide V8C7 by microwave heating
  17. People
  18. Prof. Dr. Werner Skrotzki on the occasion of his 65th birthday
  19. DGM News
  20. DGM News
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