Fast synthesis of SrFe12O19 hexaferrite in a single-mode microwave cavity |
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| Affiliation: | 1. Laboratoire CRISMAT, UMR 6508 (CNRS/ENSICAEN/Normandie Université), 6 boulevard Maréchal Juin, 14050 Caen Cedex, France;2. Laboratoire LISV – Laboratoire d''Ingénierie des Systèmes de Versailles, EA 4048, Bâtiment Boucher – Pôle scientifique et technologique de Vélizy, 10-12 avenue de l''Europe, 78140 Vélizy, France;3. CNRS – Délégation Normandie, 6 boulevard Maréchal Juin, 14050 Caen Cedex 4, France;1. Department of Biochemistry and Molecular Biology, University of Bucharest, 91-95 Splaiul Independentei, Bucharest 050095, Romania;2. Department of Histology, Faculty of Medicine, Pharmacy and Dentistry, Vasile Goldis Western University of Arad, 1 Feleacului, Arad 310396, Romania;3. Laser Department, National Institute of Laser, Plasma and Radiation Physics, 409 Atomistilor, Bucharest-Magurele 077125, Romania;4. Department of Mathematics, University of Agriculture Sciences and Veterinary Medicine, 59 Marasti, Bucharest 011464, Romania;5. Department of Experimental and Applied Biology, Institute of Life Sciences, Vasile Goldis Western University of Arad, 86 Rebreanu, Arad 310414, Romania;1. School of Environmental and Chemical Engineering, Shenyang Ligong University, Shenyang 110159, PR China;2. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China;1. Department of Chemistry, Centre for Advanced Studies-I, Guru Nanak Dev University, Amritsar 143005, India;2. Department of Chemistry, DAV College, Amritsar, Punjab 143001, India;1. Research Institute of Physics, Southern Federal University, 194 Stachki, Rostov-on-Don, 344090, Russian Federation;2. Southern Scientific Center of the Russian Academy of Sciences, 41 Chehova, Rostov-on-Don, 344006, Russian Federation;3. The Smart Materials Research Centre, Southern Federal University, 178/24 Sladkova, Rostov-on-Don, 344090, Russian Federation;1. LIEC – Department of Chemistry, Universidade Federal de São Carlos, Via Washington Luiz, Km 235, P.O. Box 676, 13565-905 São Carlos, São Paulo, Brazil;2. Department of Chemistry, Universidade Estadual Paulista – Unesp, P.O. Box 473, 17033-360 Bauru, São Paulo, Brazil;3. NanO LaB–Department of Physics, Universidade Federal de São Carlos, Via Washington Luiz, Km 235, P.O. Box 676, 13565-905 São Carlos, São Paulo, Brazil;4. Institute of Chemistry, Universidade Estadual Paulista–Unesp, Araraquara, São Paulo, Brazil;1. Department of Materials Science and Engineering, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea;2. Division of Advanced Materials Science, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea;3. Graduate Institute of Ferrous Technology, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea |
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| Abstract: | The M-type SrFe12O19 hexaferrite has been synthesized by a microwave solid state reaction process – a fast heating process – in a home-made 2.45 GHz single-mode microwave cavity. Starting from SrCO3 and Fe2O3 mixtures (1:6 ratio), cold pressed samples have been heated up in the microwave electric field without needing any susceptor, demonstrating the good coupling of the precursors with this microwave mode in our experimental setup.After optimization of the experimental conditions, the properties of the obtained ceramics, including structure, microstructure and magnetic properties, are compared with those of ceramics synthesized by conventional solid state reaction. With that microwave process, it is found that SrFe12O19 ceramics prepared in less than 30 min exhibit magnetic properties similar to those of the same compound produced by a conventional process. This highlights the potentialities of the technique to synthesize hexaferrite ceramics. |
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| Keywords: | A. Microwave processing A. Powders: solid state reaction C. Magnetic properties D. Strontium hexaferrite |
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