Low-Temperature Short-Time SPS Processes to Produce Fine-Grained High-Coercivity Barium Hexaferrite Ceramics from Polyol Nanoparticles

Journal Article · Thu Feb 15 04:00:00 EST 2018 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-017-4219-X· OSTI ID:22774121

Flores-Martínez, N.; Franceschin, G.; Nowak, S.; Ammar, S. ^[1]; Valenzuela, R. ^[2]

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1. Université de Paris-Diderot, Laboratoire ITODYS, Sorbonne Paris Cité, CNRS-UMR (France)
2. Universidad Nacional Autónoma de México, Instituto de Investigaciones en Materiales (Mexico)

Barium hexaferrite (BaFe{sub 12}O{sub 19}) ceramics were obtained by combination of polyol-synthesized precursors subsequently consolidated by spark plasma sintering (SPS) at a low temperature (800 {sup ∘}C). X-ray powder diffraction studies showed the influence of the experimental parameters to produce a virtually single- or multiphase material. The room temperature magnetic properties exhibited interesting variety of properties, including exchange coupling (spring magnet) between hexaferrite and other magnetic phases. The saturation magnetization and coercive field, at room temperature, are in the 34–70 emu/g and 4.1–5.0 kOe ranges, respectively. The combination of strong coercive field and magnetization resulted in a maximum energy product [(BH)max] = 10.9 kJ/m{sup 3} for the sample with the highest BaFe{sub 12}O{sub 19} content.

• OSTI ID: 22774121
• Journal Information: Journal of Superconductivity and Novel Magnetism, Journal Name: Journal of Superconductivity and Novel Magnetism Journal Issue: 2 Vol. 31; ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM COMPOUNDS
CERAMICS
COERCIVE FORCE
COUPLING
FERRITES
MAGNETIC PROPERTIES
MAGNETIZATION
NANOPARTICLES
NANOSTRUCTURES
PERMANENT MAGNETS
SINTERING
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K
X-RAY DIFFRACTION