Electromagnetic and microwave absorption properties of Ti3SiC2/NiFe2O4/epoxy resin coatings

In this study, coatings containing double-loss Ti3SiC2/NiFe2O4 absorbents with excellent chemical stability were synthesized. The Ti3SiC2/NiFe2O4 fillers were heat treated at 800 similar to 1000 degrees C and their microwave absorbing properties were studied. The XRD patterns showed that NiFe2O4 were successfully synthesized by self-propagating combustion method. The SEM images indicated that the NiFe2O4 powders were evenly attached on the Ti3SiC2 powders. As the temperature rises, the diffraction peak intensities and particle sizes of NiFe2O4 were enhanced. The electromagnetic properties of the Ti3SiC2/NiFe2O4/epoxy resin coatings were also investigated. As the temperature increased from 800 to 1000 degrees C, the complex permittivity increased while the permeability decreased. The microwave absorption properties were also enhanced with the rising temperature. For the powders heat treated at 1000 degrees C, the coating acquired the most desirable absorption performance. The coating with a thickness of 2.0 mm owned the widest effective absorption bandwidth in the range of 8.94 beta similar to 11.40 GHz (2.46 GHz).

Automated summary

Coatings with double-loss Ti3SiC2/NiFe2O4 absorbents of excellent chemical stability were synthesized in this study. Heat treating the Ti3SiC2/NiFe2O4 fillers at temperatures 800 to 1000 degrees C improved their microwave absorbing properties.