Sonochemical assisted synthesis of SrFe12O19 nanoparticles |
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| Affiliation: | 1. Área Académica de Ciencias de la Tierra y Materiales, UAEH, Carr. Pachuca-Tulancingo Km. 4.5, C.P. 42184 Pachuca, Hidalgo, Mexico;2. Centro de Investigación e Innovación Tecnológica del Instituto Politécnico Nacional, Cerrada Cecati s/n Col Sta. Catarina, C.P. 02250 Azcapotzalco, D.F., Mexico;3. ITODYS, UMR-CNRS 7086, Université de Paris-Diderot, 75205 Cedex 13 Paris, France;1. National University of Science and Technology MISIS, Leninskiy Aven. 4, Moscow 119049, Russian Federation;2. Science and Technology Institute of Interbranch Information, Sorge, St. 22, Moscow 125252, Russian Federation;1. Department of Chemistry, Fatih University, B.Çekmece, 34500 İstanbul, Turkey;2. Department of Polymer Engineering, Yalova University, 77100 Yalova, Turkey;3. TUBITAK-UME, National Metrology Institute, PO Box 54, Gebze, 41470 Kocaeli, Turkey;4. Department of Physics, Hitit University, Çevre Yolu Bulvarı, 19030 Çorum, Turkey;1. Department of Physics, University College of Science, Osmania University, Saifabad, Hyderabad 500004, India;2. Solid State Physics Division, Bhabha Atomic Research Center (BARC), Mumbai, India;3. School of Physics, University of Hyderabad, Gachibowli, Hyderabad 500046, India;4. Nanotechnology Centre, College of Science, University of Bahrain, P.O. Box 32038, Bahrain;5. Department of Physics, College of Science, University of Bahrain, P.O. Box 32038, Bahrain;6. Materials Research Centre, Indian Institute of Science, Bangalore 560012, India;1. Department of Chemistry, Sahyadri Science College, Kuvempu University, Shivamogga, Karnataka 577203, India;2. Department of Science, Government Polytechnic, Ramanagara, Karnataka 562159, India;3. Department of Chemistry, University of Mysore, Mysore, Karnataka 570005, India;1. Department of Physics, College of Science, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia;2. Department of Biophysics, Institute for Research & Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia;3. Department of Nano-Medicine Research, Institute for Research & Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia;4. Department of Physics, Hitit University, Çevre Yolu Bulvarı, 19030 Çorum, Turkey |
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| Abstract: | We present the synthesis of M-type strontium hexaferrite by sonochemistry and annealing. The effects of the sonication time and thermal energy on the crystal structure and magnetic properties of the obtained powders are presented. Strontium hexagonal ferrite (SrFe12O19) was successfully prepared by the ultrasonic cavitation (sonochemistry) of a complexed polyol solution of metallic acetates and diethylene glycol. The obtained materials were subsequently annealed at temperatures from 300 to 900 °C. X-ray diffraction analysis shows that the sonochemical process yields an amorphous phase containing Fe3+, Fe2+ and Sr2+ ions. This amorphous phase transforms into an intermediate phase of maghemite (γ-Fe2O3) at 300 °C. At 500 °C, the intermediate species is converted to hematite (α-Fe2O3) by a topotactic transition. The final product of strontium hexaferrite (SrFe12O19) is generated at 800 °C. The obtained strontium hexaferrite shows a magnetization of 62.3 emu/g, which is consistent with pure hexaferrite obtained by other methods, and a coercivity of 6.25 kOe, which is higher than expected for this hexaferrite. The powder morphology is composed of aggregates of rounded particles with an average particle size of 60 nm. |
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| Keywords: | Strontium hexaferrite Sonochemical synthesis Sonochemistry Hexaferrite nanoparticles |
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