Combining Soft Chemistry and Spark Plasma Sintering to Produce Highly Dense and Finely Grained Soft Ferrimagnetic Y3Fe5O12 (YIG) Ceramics |
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Authors: | Thomas Gaudisson Ulises Acevedo Sophie Nowak Nader Yaacoub Jean‐Marc Greneche Souad Ammar Raul Valenzuela |
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Affiliation: | 1. ITODYS, Université Paris Diderot, PRES Sorbonne Paris Cité, CNRS UMR‐7086, , Paris, 75205 France;2. DMMC, Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, , Ciudad de México, 04510 México;3. LUNAM, Université du Maine, Institut des Molécules et Matériaux du Mans CNRS UMR‐6283, , Le Mans, 72085 France |
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Abstract: | We report the synthesis of yttrium iron garnet (YIG) combining soft chemistry route, namely the polyol process, and spark plasma sintering (SPS) technique. The polyol process produced an intermediary amorphous phase containing both iron and yttrium cations in the desired ratio. They were annealed at 400°C in air to decompose the organic content of the reaction (polyol and acetate). To achieve the garnet phase, the polyol‐obtained precursor was subjected to reactive SPS treatment at a temperature of 750°C, far below the typical temperatures (1350°C) used in the classic solid‐state reaction process. In 15 min pure and high‐density Y3Fe5O12 ceramic, with about 100 nm sized crystalline grains, was obtained. We report as well the characterization of the initial amorphous phase and the obtained YIG by X‐ray diffraction, scanning electron microscopy, Fourier‐transform infrared spectroscopy, 57Fe Mössbauer spectrometry, and magnetization measurements. |
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