Academic Journals Database
Disseminating quality controlled scientific knowledge

Dielectric and Microwave-absorbing Properties of the Carbon/Alumina/Silica Coating

Author(s): LIU Bao-Rong, HUANG Zhi-Bin, LUO Fa, QIAN Qi-Hu

Journal: Journal of Inorganic Materials
ISSN 1000-324X

Volume: 27;
Issue: 8;
Start page: 817;
Date: 2012;
VIEW PDF   PDF DOWNLOAD PDF   Download PDF Original page

Keywords: carbon black; carbon fiber; dielectric properties; microwave absorbing properties

The permittivity and microwave-absorbing properties of carbon black or carbon fiber filled alumina/ silica coating were investigated in X-band. The results indicate that both the real and imaginary part of the complex permittivity increase with the increasing content of carbon absorber. With the same content of carbon absorber, the coatings filled with carbon fiber shows higher complex permittivity than the coatings filled with carbon black. As the absorber contents increase to 2wt%, the complex permittivity of the coatings decrease with the increase of frequency, which is so-called frequency-dependence dielectric response. The minimum reflection loss of the coatings shifts to low frequency region as their thickness increasing. The results of the microwave absorbing properties show that good microwave absorption ability (below -10 dB) can be obtained in the frequency range from 9.2 GHz to 12.4 GHz for the coating with 2wt% carbon black and 2 mm in thickness.
Save time & money - Smart Internet Solutions     

Tango Jona
Tangokurs Rapperswil-Jona