Nano Crystalline La Substituted Barium Hexaferrite Synthesized by Coprecipitation Method

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La substituted barium hexaferrite Ba1-yFe12LayO19 with 0≤ y ≤0.5 was synthesized by chemical co-precipitation method using aqueous solutions of metallic chlorides at ambient temperature. NaOH was used as a precipitant. The co-precipitated products were annealed at 900 and 1000°C. The effects of La addition on the phase composition, morphology and thermal behavior of samples were studied using XRD, SEM and DTA/TGA, respectively. XRD results indicated that barium hexaferrite forms together with some intermediate phases in samples annealed at 900°C and the amount of intermediate phases decreased significantly by increasing annealing temperature to 1000°C. XRD results also showed that in sample annealed at 1000°C, the crystallite size of magnetic phase decreases from 98 to 64 nm by increasing the amount of La. Thermal analysis (DTA/TGA) implies that formation temperature of barium hexaferrite is increased with addition of La.

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Periodical:

Advanced Materials Research (Volumes 264-265)

Edited by:

M.S.J. Hashmi, S. Mridha and S. Naher

Pages:

795-800

DOI:

10.4028/www.scientific.net/AMR.264-265.795

Citation:

A. Ataie and S. Moslemi, "Nano Crystalline La Substituted Barium Hexaferrite Synthesized by Coprecipitation Method", Advanced Materials Research, Vols. 264-265, pp. 795-800, 2011

Online since:

June 2011

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$38.00

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