LOW TEMPERATURE COMBUSTION FOR PREPARATION OF BaFe12-2x (Mn, Co)xTixO19 (x=0.0 and 1.5) POWDER MATERIALS

Priyono, Priyono and Ahyani, M and Manaf, A and Siradj, E.S. (2010) LOW TEMPERATURE COMBUSTION FOR PREPARATION OF BaFe12-2x (Mn, Co)xTixO19 (x=0.0 and 1.5) POWDER MATERIALS. PROCEEDINGS 5th Kentingan Physics Forum, International Conference on Physics and Its Applications " Environmentally Friendly Technology and Disaster Management" . ISSN ISBN : 979 - 978 - 3456 - 68 - 5

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Abstract

This papaer reports our recent works on preparation of Co and Ti substituted Barium Hexaferrite of BaFe12O19 and BaFe9Mn0.75CO0.75Ti1.5O19 compositions. Formation of single phase material was obtained through a sol-gel with ammonium nitrate melt technique followed by heating treatments below 1000 C. This was confirmed by their respective diffraction traces which consistenly showing a BaO.6(Fe2O3) compound though a slightly shift in some diffraction peak position for x > 0 was appreciated. In addition, micrographs of surface for deasified bulk materials showed a homogenous single phase of plate-like hexagonal grains with mean size of 5 - 10 µm. Results of magnetic evaluation by Permeagraph employing a magnetic field up to 2.15 T showed that the hysteresis loop for material with x = 0 was a typical of isotropic Barium Hexaferrite permanent magnet. However, for x = 1.5 the coercivity of magnetic material decreased drastically followed by a slight decrease in "total polarization" due to partial substitution of Fe ions with Mn, Co and Ti ions. A low coercivity with high polarization value combined with a high electrical resistance are properties which are particularly required for absorbtion of electromagnetic wave. It is shown that the low temperature combustion route could be a promising alternative technique for preparation of materials like Barium Hexaferrite based for high frequency application including Radar Absorbing Materials (RAM)

Item Type:Article
Uncontrolled Keywords:Barium Hexaferrite, Sol - Gel, Ultrahigh Frequency, Radar Absorbing Materials, microwave
Subjects:Q Science > QC Physics
Divisions:Faculty of Science and Mathematics > Department of Physics
ID Code:39479
Deposited By:Mr. Biologi Admin
Deposited On:16 Jun 2013 11:45
Last Modified:16 Jun 2013 11:45

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