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Mechano-Synthesized Orthoferrite Starting from Wüstite Assisted by SPS

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DOI: 10.4236/ampc.2014.43007    4,004 Downloads   5,452 Views  


Stoichiometric mixtures of FeO and Y2O3 were milled and heat treated to obtain yttrium iron garnet, Y3Fe5O12. Two types of heating systems were used: one, a spark plasma sintering machine and the second, an electrical oven. The magnetic properties of the resulting specimens have been analyzed and discussed as a function of the grain size and the particles’ morphology. The partial formation of garnet and orthoferrite phases was revealed on the obtained powder through microstructural analyses after 9 h of ball milling. The milled powders were transformed into the orthoferrite phase after the SPS-treatment at 700°C and 900°C. Magnetic-saturation studies revealed magnetic responses up to 12.7 emu/g for specimens SPS-treated at 700°C, whereas 2.1 emu/g for samples SPS-treated at 900°C. Conventionally treated specimens at 700°C developed 0.36 emu/g of magnetization, while 0.93 emu/g was registered for those treated at 900°C.

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Cortés-Escobedo, C. , Sánchez-De Jesus, F. , Bolarín-Miró, A. , Nowak, S. , Juárez-Camacho, E. , de la Torre, S. and Valenzuela, R. (2014) Mechano-Synthesized Orthoferrite Starting from Wüstite Assisted by SPS. Advances in Materials Physics and Chemistry, 4, 43-49. doi: 10.4236/ampc.2014.43007.


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