Study of dielectric and electromagnetic shielding behaviour of BaTiO₃‐CoFe₂O₄ filled LDPE composite

Abstract

This paper reports the formation of BaTiO 3 /CoFe 2 O 4 (BT-CFO) filled lowdensity-polyethylene (LDPE) composite via the process of melt mixing and characterization for their dielectric and electromagnetic shielding behaviors. The X-Ray diffraction (XRD) result of synthesized CoFe 2 O 4 shows the cubic phase structure formation with a crystallite size of 28.6 nm. The BT nanopowder and synthesized nanopowder of Cobalt ferrite (CFO) were mixed together in an equal amount (50:50), and sintered at 800 C for 1 hour. A series of samples of BT-CFO was prepared by taking a different amount of BT-CFO (ie, 4, 8, 12, 16, and 20 wt%) with LDPE. The dielectric measurements of BT-CFO/LDPE composites were carried out at different temperatures using LCR meter at a frequency range from 40 Hz to 5 MHz. The dielectric behaviour of samples exhibited a change in dielectric constant with an increase in temperature and frequency. The electromagnetic shielding measurements were examined over X-band with a frequency range from 8.2GHz to 12.4GHz of the prepared BT-CFO/LDPE composites. The EMI shielding effectiveness of prepared BT-CFO/LDPE composites exhibited a maximum value of 17.9 dB.

Recent advancements in the electromagnetic interference shielding performance of nanostructured materials and their nanocomposites: a review

“…429 BaTiO 3 /PANI composite prepared by adding PANI (50 wt%) to BaTiO 3 (BaTiO 3 /PANI wt ratio ¼ 1 : 1) showed the minimum reection loss of À20 dB (23 Hz) and À27 dB (33 GHz). 430 PANI-tetragonal BaTiO 3 , 431 CNT (2 wt%)/BaTiO 3 (34.5 wt%)/ epoxy, 432 BaTiO 3 -CoFe 2 O 4 lled LDPE, 433 graphite nanoplatelets (6 wt%)/BaTiO 3 (30 wt%)/epoxy, 434 NiO@SiO 2 (15 wt%)/PVDF, 435 EPDM/BaTiO 3 (20 phr)/MWCNT (10 phr), 436 tetragonal BaTiO 3 (80 phr)/NBR, 437 CNT/BaTiO 3 /polyaniline, 438 445 and PANI/TiO 2 /g-Fe 2 O 3 , 446 have also been studied for their EMI shielding efficiencies.…”

“…Dielectric materials and their composites have also been used in blocking incoming EM waves. 406–437 Lu et al 406 studied the thickness dependence variation of reflection loss against ε ′ and ε ′′ (Fig. 18(a)) and microwave absorption properties of the composites loaded with 10 wt% ZnO@MWCNTs vs. the frequency and thickness at different temperatures (Fig.…”

“…PANI–tetragonal BaTiO 3 , 431 CNT (2 wt%)/BaTiO 3 (34.5 wt%)/epoxy, 432 BaTiO 3 –CoFe 2 O 4 filled LDPE, 433 graphite nanoplatelets (6 wt%)/BaTiO 3 (30 wt%)/epoxy, 434 NiO@SiO 2 (15 wt%)/PVDF, 435 EPDM/BaTiO 3 (20 phr)/MWCNT (10 phr), 436 tetragonal BaTiO 3 (80 phr)/NBR, 437 CNT/BaTiO 3 /polyaniline, 438 C/SiO 2 , 439 MgO–Al 2 O 3 –SiO 2 glass–ceramic system, 440 PANI/HA/TiO 2 /Fe 3 O 4 , 441 PANI-filled TiO 2 , 442 PANI/Sb 2 O 3 , 443 PANI/Y 2 O 3 , 444 SnO, 445 and PANI/TiO 2 /γ-Fe 2 O 3 , 446 have also been studied for their EMI shielding efficiencies.…”

Dielectric study of CoFe2O4/MWCNT/epoxy nanocomposites: Effect of temperature, concentration and irradiation

“…[ 9–14 ] Among all the magnetic particles cobalt ferrite (CFO) is extensively considered magnetic nanoparticles due to their excellent magnetic, mechanical, thermal, and dielectric properties. [ 15–17 ] Recently, integration of two or more material is in trend as a result of their complementary properties of each of the constituents added in development of composites. [ 18 ] Owing to excellent properties of multiwall carbon nanotubes (MWCNT), it is being utilized in various electronic devices.…”

Preferential localization of conductive filler in ethylene‐co‐methyl acrylate/thermoplastic polyolefin polymer blends to reduce percolation threshold and enhanced electromagnetic radiation shielding over K band region

“…In the technologically advanced age, the enormous utilization of contemporary electronic appliances and telecommunication systems, which operate at microwave and radio frequencies are responsible for the birth of a novel hazard known as electromagnetic interference (EMI), having detrimental effects on modern society. [1][2][3][4][5] EMI not only interferes with electronic gadgets but sometimes can be responsible for the severe catastrophe of revenue, energy as well as human life. Consequently, EMI shielding draws excellent attention in the research field and daily life to prevent the calamity of electromagnetic radiation in the microwave region.…”