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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Microstructure and magnetic properties of microwave-sintered chromium-doped barium hexaferrite

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W. S. Castro ; L. J. D. Costa ; R. R. Corrêa ; A. J. A. de Oliveira ; R. H. G. A. Kiminami
Total Authors: 5
Document type: Journal article
Source: Cerâmica; v. 60, n. 356, p. 563-568, Dez. 2014.

The purpose of this work was to sinter commercial barium hexaferrite ceramic in a microwave oven, aiming to obtain magnetic properties similar to those obtained by conventional sintering. Samples of barium hexaferrite were doped with chromium, isostatically pressed and sintered in a microwave oven and a conventional furnace for comparison. The sintered samples were characterized by X-ray diffraction, scanning electron microscopy, bulk density, and magnetic hysteresis curves. Microwave sintering of the barium hexaferrite took less than 20% of the time spent in conventional sintering. The microwave sintered samples showed a somewhat smaller grain size, but their density and saturation magnetization were similar to those obtained by conventional sintering, indicating the promising potential of processing commercial barium hexaferrite by microwaves. The addition of chromium oxide to the barium hexaferrite samples improved their magnetic properties. (AU)

FAPESP's process: 12/24025-0 - Magnetic, electrical and magnetostrictive properties of multiferroic composites and dilute magnetic semiconductors oxides
Grantee:Adilson Jesus Aparecido de Oliveira
Support type: Regular Research Grants
FAPESP's process: 08/04025-0 - Nanostructured multifunctional multiferroic materials: synthesis, properties, phenomenology and applications
Grantee:José Antonio Eiras
Support type: Research Projects - Thematic Grants