Abstract
Lately, silicone rubber, because of the desirable permittivity on the one hand, and various applications in the implants, membranes, solar cells, sensors, semiconductor devices, high frequency devices, photothermal therapy methods, acoustic metamaterials, and insulator materials on the other hand, has attracted considerable attention. In this research, CuCr2O4 nanoparticles were prepared according to the sol–gel method and then were identified by Fourier transform infrared (FT-IR), X-ray powder diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and vibrating sample magnetometer (VSM). Results showed that monophase crystal structure with identical morphology of CuCr2O4 nanoparticles has been synthesized. Finally, CuCr2O4 nanoparticles and silicone rubber were composited and then microwave absorbing properties of the CuCr2O4/silicone rubber nanocomposite were investigated by vector network analyzer (VNA), exhibiting 48.56 dB microwave attenuation for the CuCr2O4/silicone rubber nanocomposite with 2.6 mm thickness at 10.9 GHz frequency, while having more than 92.99% microwave absorption along the x-band frequency.
Highlights
In recent years, merged metal oxide nanoparticles with spinel structure (AB2O4) have attracted considerable attention because of their wide variety of applications [1,2,3,4,5]
The results indicated that full width at half maximum (FWHM) of the (012), (104), (110), and (116) crystal planes related to the CuCrO2 structure was decreased or disappeared by increasing the temperature
All the crystal phases of CuCr2O4 nanoparticles at 850 °C corresponded to the [34-0424] standard cart and confirmed that the nanoparticles were formed
Summary
In recent years, merged metal oxide nanoparticles with spinel structure (AB2O4) have attracted considerable attention because of their wide variety of applications [1,2,3,4,5]. Copper chromite spinel structure (CuCr2O4) has attracted large attention due to thermal and chemical stability and various applications such as: photocatalytic degradation, photocatalytic H2 production, oxidation of carbon monoxide, and water treatment. In this method, metal oxides of nanoparticles were used as precursors and were ball milled and sintered in high temperature. Due to the widespread application of the CuCr2O4 nanoparticles in recent years, the heat treatment effect on the purity of the crystal structure of spinel nanoparticles has been. Microwave absorption properties of the prepared nanoparticles were studied using silicone rubber as polymeric matrix
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