|
| Dispersion Properties on Nickalloy/ Iron Package Mica Powder Composite Absorbing Coatings |
| Received:September 28, 2016 Revised:March 15, 2017 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/ issn.1672-9242.2017.03.019 |
| KeyWord:nickalloy iron package mica powder composite absorbing coatings materials frequency dispersion properties |
| Author | Institution |
| BAN Guo-dong |
Dept. of Chemistry & Material Engineering, LEU, Chongqing , China |
| LIU Zhao-hui |
Dept. of Chemistry & Material Engineering, LEU, Chongqing , China |
| YE Sheng-tian |
Unit 63983 of PLA, Wuxi , China |
| TAO Rui |
Dept. of Chemistry & Material Engineering, LEU, Chongqing , China |
| YANG Hong-bo |
Dept. of Chemistry & Material Engineering, LEU, Chongqing , China |
|
| Hits: |
| Download times: |
| Abstract: |
| Objective To explore dispersion properties of nickalloy/iron package mica powder composite absorbing coatings at different mass fraction ratio. Methods A scanning electron microscope (SEM) was used to observe microstructures of nickalloy and iron package mica powder. An energy dispersive spectrometer attached to the instrument was used to measure contents of elements in the area selected in samples. Spectra properties of permittivity and permeability of the nickalloy/paraffin and iron package mica powder/paraffin composite materials were studied by vector network analyzer. The reflection loss of single layer absorbing coating of different thickness prepared by adding nickalloy and iron package mica powder of different mass ratio in the epoxy resin-polyamide system at frequency band of 2-18 GHz during NRL-arc test. Results Nickalloy in low frequency range had good frequency dispersion properties, which had great effects on the electromagnetic wave magnetic loss. If it was used as a filler of absorbing coatings, it could reduce the quantity of absorbent and the thickness of the coating at the same time. The real part of dielectric constant of iron package mica powder was low. It had good impedance matching with free space and broadened the absorbing bandwidth. When epoxy-polyamide system was used as the matrix resin, a single-layer coating with a 30%/30% quality concentration of both nickalloy/iron package mica powder was prepared, which had a thickness of 1.2 mm. The reflection loss was tested in the frequency range of 2-18 GHz, which showed a minimum reflection of －21.8 dB with a －10 dB bandwidth of nearly 10.5 GHz. Conclusion An absorbing coating with appropriate concentration of both nickalloy and iron package mica powder has good absorbing ability, thin thickness and wide absorbing bandwidth. |
| Close |
|
|
|