Abstract
This article highlights the microwave absorption and dielectric attributes of synthesized polyaniline (PAni)-yttrium trioxide (Y
) composites. Temperature-dependent conductivity measurements were carried out in the temperature range of 300–473 K, which indicates the presence of hopping conduction. The PAni-Y
composites showed semiconductor behavior with the exponential variation of inverse temperature dependence of electrical conductivity. Microwave measurements were carried out in the X-band (8–12 GHz) frequency; the composites exhibit absorption-dominated shielding effectiveness (SE
) in the range -33 to -35 dB (>99% microwave attenuation) and minimum electromagnetic reflection. The
′ and
″ values of the composites are in the range of 81.5–97.5 and 80–118.5, respectively. The PAni-Y
composites showed significant improvement in microwave SE and complex permittivity of the composites, indicating the influence of Y
in PAni.