Nano Crystalline La Substituted Barium Hexaferrite Synthesized by Coprecipitation Method

Abolghasem Ataie; S. Moslemi

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

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 264-265Nano Crystalline La Substituted Barium Hexaferrite...

Nano Crystalline La Substituted Barium Hexaferrite Synthesized by Coprecipitation Method

Abstract:

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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Advanced Materials Research (Volumes 264-265)

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795-800

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https://doi.org/10.4028/www.scientific.net/AMR.264-265.795

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Online since:

June 2011

Authors:

Abolghasem Ataie, S. Moslemi

Keywords:

Barium Hexaferrite, Co-Precipitation, La Substitution

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