Electromagnetic interference of nickel ferrite and copper ferrite filled low-density polyethylene composite

Abstract

This study reports the preparation of nickel ferrite (NiFe₂O₄) and copper ferrite (CuFe₂O₄) filled low-density polyethylene (LDPE) composite through a melt mixing process for employing in electromagnetic shielding applications. The X-Ray diffraction (XRD) with different pH values 6, 8 and 10 resulted the formation of cubic structure for NiFe₂O₄ of cristallite size 21 nm, 25 nm and 40 nm, respectively and tetragonal structure for CuFe₂O₄ with crystallite size 27 nm, 24 nm and 91 nm, respectively. Electromagnetic interference (EMI) shielding measurements of the prepared samples LDPE/NiFe₂O₄ and LDPE/CuFe₂O₄ having different pH values 6, 8 and, 10 for 10% and 30% filler concentrations were analyzed over X-band with a frequency range from 8 GHz to 12.4 GHz. The pure LDPE exhibits the total shielding effectiveness (SE) of 11.6 dB whereas with the addition of NiFe₂O₄ and CuFe₂O₄, the composites exhibit increment in EMI shielding effectiveness up to the maximum value of 15.3 dB for LDPE/NiFe₂O₄ and 12.6 dB for LDPE/CuFe₂O₄ respectively.