Tailoring of complex permittivity, permeability, and microwave-absorbing properties of CoFe2O4/NG/PMMA nanocomposites through swift heavy ions irradiation
Source abstract
Abstract
Abstract In this study, the influence of swift heavy ions (SHI) [C6+ (80 MeV) and O7+ (100 MeV)] irradiation on microwave (MW) absorbing properties of cobalt ferrite nanoparticles/exfoliated nanographites/poly(methylmethacrylate) (CoFe2O4/NG/PMMA) nanocomposites was investigated in the frequency range of 2–18 GHz. This work is the first attempt to study the comprehensive effects of SHI irradiation on MW absorbing properties of polymer nanocomposites. The scanning electron micrographs of the nanocomposites reveal monotonic improvement in the dispersion of nanofillers (CoFe2O4 and NG) with an increase of irradiation dose. With an increase in the fluence of ions, the room temperature saturation magnetization was observed to decrease monotonically, whereas a reverse trend was detected for the coercivity. The SHI irradiated nanocomposites exhibited a relatively stronger MW absorption as well as a higher effective bandwidth of absorption. A minimum reflection loss (RLmin) of −36.7 dB (99.98% MW absorption) and a broad bandwidth (for RL ≤ −10 dB) of ~7.1 GHz were detected in O7+ (100 MeV) SHI irradiated nanocomposite at the fluence of 1 × 1012 ions/cm2. The results demonstrate that SHI irradiation can used as an effective tool to tailor and enhance the MW absorption in light-weight CoFe2O4/NG/PMMA nanocomposites.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Electromagnetic wave absorption materials · Dielectric materials and actuators · Polymer Nanocomposite Synthesis and Irradiation
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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