Investigation of the structural and microwave dielectric properties of mechanically alloyed Fe₄₀Co₆₀ powders

Microwave Absorption Properties of Fe₄₀Co₆₀ Based Nanocomposites

“…Corresponding spectra in Fig. 6.a show moderate values with increasing tendency according to frequency for all the samples over the microwaves band [8][9][10][11][12][13][14][15]. The low values are observed for 60h MA duration.…”

“…In summary, in this study, the complex relative dielectric permittivity 𝜀 𝑟 and magnetic permeability 𝜇 𝑟 spectra were investigated in 𝐹𝑒 40 𝐶𝑜 60 based nanocomposites obtained by solution dispersion of nanocrystalline 𝐹𝑒 40 𝐶𝑜 60 in commercial epoxy resin and shaped as thin slabs. The experimental results indicate that the prepared materials show good microwave absorption characteristic over the [8][9][10][11][12][13][14][15] GHz frequency range. The maximum reflection loss is -24 dB observed at 13.75 GHz and reached after 12h of milling.…”

“…5 shows the calculated microwave conductivity via Eq. 9 using measured complex relative dielectric permittivity in a resonant cavity [11]. The microwave conductivity is a function of the imaginary part of the relative dielectric permittivity; this last is proportional to the dielectric energy dissipation caused in the electromagnetic field when interacting with the sample of the material.…”

“…The microwave experiments involved a Network Analyzer (VNA). Obtained results in terms of reflection losses show a good absorbing characteristic over the [8][9][10][11][12][13][14][15] GHz microwaves band.…”

Synthesis and Characterization of Fe-Based Nanocomposites

“…Fig. 2 depicts the mean grain size, residual strain, lattice parameter and mixing factors of coarse and milled Fe powders extracted from XRD analyse according to the Halder-Wagner approach [9,10]:…”