Magnetite-cobalt ferrite nanoparticles for kerosene-based magnetic fluids |
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| Affiliation: | 1. Centro de Investigación en Materiales Avanzados, Miguel de Cervantes Saavedra No. 120, Complejo Industrial Chihuahua, Chihuahua, Chih., México;2. Centro de Investigación en Química Aplicada, Blvd. Enrique Reyna Hermosillo No. 140 CP 25000 Saltillo, Coahuila, México;3. Department of Electronic and Electrical Engineering, Trinity College, Dublin 2, Ireland;1. Department of Mechanical Engineering, Babol Noshiravni University of Technology, Babol, Iran;2. Department of Mathematics, COMSATS Institute of Information Technology, Sahiwal 57000, Pakistan;1. Departamento de Ingeniería Eléctrica y computación, Universidad Autónoma de Ciudad Juárez, Ciudad Juárez, Chih., Mexico;2. Departamento de Ingeniería Industrial, Universidad Autónoma de Ciudad Juárez, Ciudad Juárez, Chih., Mexico;1. Department for Management of Science and Technology Development, Ton Duc Thang University, Ho Chi Minh City, Vietnam;2. Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam;3. Young Researchers and Elite Club, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran;4. Mechnaical Engineering Department, Dezful Branch, Islamic Azad University, Dezful, Iran;5. Faculty of Mathematics and Computer Science, Babeş-Bolyai University, 400084 Cluj-Napoca, Romania;1. Politehnica University Timisoara, Faculty of Industrial Chemistry and Environmental Engineering, 6 V. Parvan Blv., RO-300223, Timisoara, Romania;2. Politehnica University Timisoara, Research Institute for Renewable Energy, 2 Piata Victoriei, RO-300006, Timisoara, Romania;3. West University of Timisoara, 4 V. Parvan Blv., RO-300223, Timisoara, Romania;4. Politehnica University Timisoara, Faculty of Mechanical Engineering, 1 Mihai Viteazul Blv., RO-300222, Timisoara, Romania;1. Centro de Investigación en Química Aplicada, Blvd. Enrique Reyna Hermosillo #140, Saltillo 25294, Coahuila, México;2. Centro de Investigación en Nanomateriales y Nanotecnología, Avenida de la Vega 4-6, El Entrego, 33940, San Martin del Rey Aurelio, Asturias, España;3. Instituto Tecnológico de Saltillo, V. Carranza 2400, Saltillo 25280, Coahuila, México |
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| Abstract: | 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. |
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