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http://cimav.repositorioinstitucional.mx/jspui/handle/1004/1002| Magnetite-cobalt ferrite nanoparticles for kerosene-based magnetic fluids | |
| OSCAR EDUARDO AYALA VALENZUELA | |
| JOSE ANDRES MATUTES AQUINO REBECA BETANCOURT GALINDO LUIS ALFONSO GARCIA CERDA | |
| Acceso Abierto | |
| Sin Derechos Reservados | |
| Cobalt | |
| Due to the magnetic anisotropy introduced by the Co2+ ion in octahedral sites of cubic spinel ferrites, it is possible to tailor the magnetic properties by changing the cobalt content. Magnetic fluids with magnetite-cobalt ferrite nanoparticles given by the formula Co(x)Fe(3-x)O4 with x = 0, 0.2 and 0.4 were prepared. Kerosene and oleic acid were used as liquid carrier and surfactant, respectively. Spherical magnetic nanoparticles were obtained by coprecipitation from metal salts and ammonium hydroxide; afterwards the magnetic fluids were obtained by a peptization process. Powder properties were characterized by X-ray diffraction (XRD), nitrogen adsorption–desorption isotherma (BET), vibrating sample magnetometry (VSM) and fluids by transmission electron microscopy (TEM), thermogravimetric analyzer (TGA), VSM and the short-circuited transmission line technique. | |
| 2005 | |
| Artículo | |
| OTRAS | |
| Versión revisada | |
| submittedVersion - Versión revisada | |
| Aparece en las colecciones: | Artículos |
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| Magnetite-cobalt ferrite nanoparticles for kerosene-based magnetic fluids PDF 2005.pdf | 208.14 kB | Adobe PDF | Visualizar/Abrir |