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Abstract
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In the present work, the synthesis of Barium hexaferrite (BaFe12O19) nanoparticles in
the presence of a large excess amount of OH− anions by the hydrothermal method in
the presence and absence of surfactants such as sodium dodecyl benzene sulfonate
and Triton X-114 was reported. The optimized temperature in the absence of
surfactant was determined (200 °C) and then Barium hexaferrite nanoparticles were
synthesized by assistance of surfactants at this temperature. In this way, it was
confirmed that the secondary re-crystallization can be totally suppressed with the use
of surfactant and addition of surfactant leads to the synthesis of uniform and ultrafine
nanoparticles with excellent super paramagnetic properties. Barium hexaferite
nanoparticles have a disc-like shape. The structure, morphology and magnetic
properties of samples were characterized and investigated by powder X-ray
diffraction (PXRD), scanning electron microscopy (SEM) and vibrating sample
magnetometer (VSM) techniques.
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