Enhanced electromagnetic absorption in ferrite and tantalum pentoxide based polypyrrole nanocomposite

Publication date: Available online 16 April 2019Source: Progress in Natural Science: Materials InternationalAuthor(s): Preeti Gairola, L.P. Purohit, S.P. Gairola, Preetam Bhardwaj, Shivani KaushikAbstractThe electromagnetic interference (EMI) shielding properties of polypyrrole/barium ferrite/tantalum pentoxide nanocomposite were studied in the X-band frequency range from 8.2 GHz to 12.4 GHz. The nanocomposites were chemically synthesized at room temperature and then characterized by various techniques. The dielectric material parameters were calculated based on the experimental scattering parameters using Nicholson–Ross and Weir algorithms. The synthesized nanocomposites demonstrated that the shielding effectiveness up to 50 dB depended upon the dielectric loss and weight fraction of ferrite and Ta2O5 in the polymer matrix.Graphical abstract
Source: Progress in Natural Science: Materials International - Category: Materials Science Source Type: research