Verma, Meenakshi and Singh, Avanish Pratap and Sambyal, Pradeep and Singh, Bhanu Pratap and Dhawan, S. K. and Choudhary, Veena (2015) Barium ferrite decorated reduced graphene oxide nanocomposite for effective electromagnetic interference shielding. Physical Chemistry Chemical Physics, 17 (3). 1610 -1618. ISSN 1463-9076
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Abstract
There is an increased interest in the development of high performance microwave shielding materials against electromagnetic pollution in recent years. Barium ferrite decorated reduced graphene oxide (BaFe12O19@RGO) nanocomposite was synthesized by a high energy ball milling technique and its electromagnetic properties were investigated in the frequency range of 12.4-18 GHz (Ku band). The results showed that barium ferrite (BaFe12O19) nanoparticles with an average particle size of 20-30 nm were well distributed and firmly anchored onto the surface of the reduced graphene oxide sheets. The obtained nanocomposite exhibited a saturation magnetization of 18.1 emu g(-1) at room temperature. The presence of BaFe12O19 nanoparticles in the nanocomposite enhances the space charge polarization, natural resonance, multiple scattering and the effective anisotropy energy leading to a high electromagnetic interference shielding effectiveness of 32 dB (similar to 99.9% attenuation) at a critical thickness of 3 mm. The results suggested that the as-prepared BaFe12O19@RGO nanocomposite showed great potential as an effective candidate for a new type of microwave absorbing material.
| Item Type: | Article |
|---|---|
| Subjects: | Chemistry > Physical Chemistry Physics > Atomic and Molecular Physics |
| Divisions: | UNSPECIFIED |
| Depositing User: | Dr. Rajpal Walke |
| Date Deposited: | 19 Sep 2016 06:32 |
| Last Modified: | 19 Sep 2016 06:32 |
| URI: | http://npl.csircentral.net/id/eprint/1727 |
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