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Proceedings Paper

Effect of annealing temperature of nano-sized BaFe[sub]12[/sub]O[sub]19[/sub] in Novolac phenolic resin on microwave properties for use as EMI shielding material in X-band
Author(s): S. Ozah; N. S. Bhattacharyya
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Paper Abstract

Nanosized barium ferrite (BaFe12O19) powders are synthesized using co-precipitation technique at three different annealing temperatures. The X-Ray Diffraction pattern indicates the presence of hexagonal structure for all the three samples. Transmission electron microscopy (TEM) shows the particles are hexagonal in shape. The synthesized BaFe12O19 powder samples are mechanically mixed with Novolac phenolic resin (NPR) with filler to polymer weight ratio of 30:60 to prepare pellets of BaFe12O19/NPR composites of dimensions, 10.38 mm x 22.94 mm x 4 mm. The complex permittivity, εr and complex permeability, μr of the developed samples are measured at X-band by Nicolson-Ross method using Agilent E8362C vector network analyzer. The effect of the annealing temperature on the complex permittivity and permeability in the X-band is studied. The maximum dielectric constant and permeability is obtained of the BaFe12O19/NPR composite with BaFe12O19 annealed at 9000C as 6 and 2 respectively. The composite is a good candidate for microwave absorption study.

Paper Details

Date Published: 28 January 2013
PDF: 7 pages
Proc. SPIE 8760, International Conference on Communication and Electronics System Design, 87600Q (28 January 2013); doi: 10.1117/12.2010423
Show Author Affiliations
S. Ozah, Tezpur Univ. (India)
N. S. Bhattacharyya, Tezpur Univ. (India)


Published in SPIE Proceedings Vol. 8760:
International Conference on Communication and Electronics System Design
Vijay Janyani; M. Salim; K. K. Sharma, Editor(s)

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