Development of BaAlxFe12-xO19-NPR nanocomposite as an efficient absorbing material in the X-band

作者：Ozah S; Bhattacharyya N S^*

来源：Journal of Magnetism and Magnetic Materials, 2015, 374: 516-524.

DOI：10.1010/j.jmmm.2014.08.080

• Microwave absorber
• Barium ferrite
• Reflection loss
• Complex permittivity
• Complex permeability

An efficient BaAlxFe12-xO19- novolac phenolic resin (NPR) nanocomposite material is developed to use as absorbing material in the X band. The material developed has a hexagonal structure of nanosize aluminium substituted barium ferrite, as is confirmed by X-ray diffraction pattern studies. The average grain size of barium nanoparticles is found to be similar to 26 nm. Measurement of complex permittivity and complex permeability in the X-band indicates increase of the properties with increase in Al3+ ions in the ferrite. A measured absorption study has been carried out on absorber fabricated on a metal backing based on the transmission line theory. Substitution of Fe3+ with Al3+ is found to increase the absorption properties of barium ferrite. Reflection loss measurement of the samples shows an enhancement of absorption from -27.56 dB to -40.06 dB with the variation of Al3+ substitution, x=1.0-1.6 in the BaAlxFe12-xO19 in NPR matrix.

• 出版日期2015-1-15