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 MSA  Vol.7 No.4 , April 2016
Synthesis and Characterization of Advanced Red Mud and MWCNTs Based EMI Shielding Material via Ceramic Processing
Abstract: For the first time in the world advanced multi layered Red Mud and MWCNTs (ARMC) based EMI shielding material has been developed at CSIR-AMPRI, Bhopal. Red mud provides oxides of titanium and iron as precursor and the MWCNTs provides electrical conductivity characteristics necessary for making desired EMI shielding materials. The novel process involves unique designing of chemical compositions and mineralogical phases of red mud, MWCNTs together with appropriate additive and solvent which results in the simultaneous and synergistic chemical reactions among various constituents thereby forming tailored precursor powder. Further, the ceramic processing of tailored precursor powder in appropriate environment enables formation of advanced ARMC shielding material having a variety of ceramic phases with multi elemental compositions and multi layered crystal structures. The synthesized material was characterized by various techniques namely XRD, PL, FESEM, EDXA. The reflection loss (R. L.) of the sample was calculated based on the measured complex permittivity and permeability. The advanced ARMC material with thickness t = 1.5 mm showed a minimum R. L. of -35.5 Db at 14.0 GHz with a response band width of 1.8 GHz. Thus, the developed advanced ARMC material acts as a good EMI wave absorber.
Cite this paper: Verma, S. , Amritphale, S. and Das, S. (2016) Synthesis and Characterization of Advanced Red Mud and MWCNTs Based EMI Shielding Material via Ceramic Processing. Materials Sciences and Applications, 7, 192-201. doi: 10.4236/msa.2016.74019.
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