DEVELOPMENT OF AL- DOPED STRONTIUM FERRITE/ LLDPE NANO COMPOSITE AND ITS MICROWAVE ABSORPTION PERFORMANCE IN X-BAND

Abstract

In the present work, aluminium doped strontium ferrite nanoparticles x=1,2,3,4) are used as inclusions in Linear Low Density Polyethylene (LLDPE) matrix to develop a composite.SrAl x Fe 12-x O 19 is prepared for three different annealing temperatures, i.e., 800ºC, 900ºC and 1000ºC.The X-ray diffraction study is conducted on SrAl x Fe 12-x O 19 .The complex permittivity and complex permeability is measured at X-band.Reflection loss of SrAl x Fe 12-x O 19 /LLDPE composite is determined using transmission line modelling (TLM) from the measured permittivity values.Thickness optimization carried out for the same sample from 1 mm to 4 mm, showed maximum reflection loss for 3 mm thickness and -10 dB bandwidth (i.e.90% absorption) of ~3.02 GHz (8.70 to 11.72 GHz) for SrAl x Fe 12-x O 19 /LLDPE composite (x=3).