Structural and Magnetic Properties of BaMg2Fe10O19 Hexaferrite Particles

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BaMg2Fe10O19 hexaferrite particles were synthesized by using a Stearic acid gel method. The prepared Ba-Mg hexaferrite particles were calcinated at Microwave frequency (2.45 GHz, power 900W, 5 min.) as well as at 650°C, 750°C, 850°C and 950°C. Decomposition behavior and the phase associated therein are investigated by means of thermal analysis (DTA, TGA, DSC) and XRD, respectively. The X-ray diffractograms of prepared samples calcinated at 650°C, 750°C, 850°C and 950°C show the presence of M and α- Fe2O3 Phases, whereas the sample heated in a microwave oven shows only single M-phase. Surface morphology of nonporous particles has been examined by using SEM. The samples prepared by conventional heat treatment produces agglomerated clusters of various size particles whereas, the sample heated in a microwave oven shows separate particles with size ranging from 80-240nm. There is significant change in crystallite size of the resultant Ba-Mg hexaferrite particles prepared at microwave frequency. It was observed that heat treatment condition plays a very crucial role in controlling morphology of prepared Ba-Mg hexaferrite particles. Room temperature magnetic measurements were carried out using VSM. Magnetic study reveals that prepared BaMg2Fe10O19 particles possess single magnetic domains.

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Periodical:

Edited by:

S. Ray, S.K. Nath, A. Kumar, R.C. Agarwala, V. Agarwala, G.P. Chaudhari, B.S.S. Daniel

Pages:

137-142

DOI:

10.4028/www.scientific.net/AMR.67.137

Citation:

R. B. Jotania et al., "Structural and Magnetic Properties of BaMg2Fe10O19 Hexaferrite Particles", Advanced Materials Research, Vol. 67, pp. 137-142, 2009

Online since:

April 2009

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$35.00

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