Insights into the Dielectric Loss Mechanism of Bianisotropic FeSi/SiC Composite Materials

Abstract

High magnitudes of permittivity with the permeability of the materials help to absorb electromagnetic waves more efficiently. Snoek’s limit directly puts a constraint on the enhancement of the permeability of the material. However, the incorporation of the lossy material may help to enhance the permittivity abruptly. In this study, we prepared a FeSi/SiC composite material with the mechanical ball milling method and investigated its enhancement of the dielectric behavior. The bianisotropic nature was observed along with the phase purity in the morphological studies. The Cole–Cole relaxation mechanisms were observed to validate a complex relaxation mechanism with 10 4 times higher dielectric loss in the composite material. The detection of the Warburg capacitance using the impedance technique sheds new light on the ion diffusion mechanism in the metallic composite materials.

Mineral composition, crystallinity and dielectric evaluation of Bamboo Salt, Himalaya Salt, and Ba’kelalan salt content

“…The loss factor and conductivity properties are crucial for understanding the electrical behaviour of materials and their wide-ranging applications [ 12 , 13 , 15 , 16 ]. The loss factor plays a vital role in dielectric material applications, affecting the efficiency and performance of electrical components and devices.…”

“…Extensive researches were conducted mainly on investigating dielectric properties of advanced materials, e.g. ceramics [ 10 , 11 ], magnetic materials [ 12 , 13 ], perovskite [ 14 , 15 ], and composites [ 16 ]. Therefore, this study endeavours to assess the potential of the dielectric method in determining the mineral composition of Bamboo Salt, Himalaya Salt, and Ba'kelalan Salt, with the support of crystallinity analysis.…”

Localized Surface Plasmon of Ag Nanoparticles Dispersed in β-FeSi2 Matrix for Enhancing Infrared Refractive Index

“…Upon comparing X-ray diffraction patterns of the monolithic β-FeSi 2 layers with Si addition via RF 0, 20, or 40 W, most XRD peaks were attributed to β-FeSi 2 . However, a slight shoulder at 2θ = 45.5° was observed in the β-FeSi 2 layer with no Si addition (RF 0 W), which was attributed to the ε-FeSi phase . Simultaneous sputtering of β-FeSi 2 with Si (RF 20 W) rendered the ε-FeSi shoulder invisible, indicating that Si addition brought the β-FeSi 2 layer closer to the stoichiometric phase.…”

“…However, a slight shoulder at 2θ = 45.5°was observed in the β-FeSi 2 layer with no Si addition (RF 0 W), which was attributed to the ε-FeSi phase. 15 Simultaneous sputtering of β-FeSi 2 with Si (RF 20 W) rendered the ε-FeSi shoulder invisible, indicating that Si addition brought the β-FeSi 2 layer closer to the stoichiometric phase. The β-FeSi 2 layer with excess Si via RF 40 W exhibited an XRD pattern without any peaks from the Si phase, implying the potential coexistence of the amorphous Si phase with the β-FeSi 2 phase.…”