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摘要
This article highlights the microwave absorption and dielectric attributes of synthesized polyaniline (PAni)-yttrium trioxide (Y2O3) 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-Y2O3 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 A) in the range -33 to -35 dB (>99% microwave attenuation) and minimum electromagnetic reflection. The epsilon' and epsilon '' values of the composites are in the range of 81.5-97.5 and 80-118.5, respectively. The PAni-Y2O3 composites showed significant improvement in microwave SE and complex permittivity of the composites, indicating the influence of Y2O3 in PAni.
- 出版日期2014-5
