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Combining Soft Chemistry and Spark Plasma Sintering to Produce Highly Dense and Finely Grained Soft Ferrimagnetic Y 3 Fe 5 O 12 ( YIG ) Ceramics
Author(s) -
Gaudisson Thomas,
Acevedo Ulises,
Nowak Sophie,
Yaacoub Nader,
Greneche JeanMarc,
Ammar Souad,
Valenzuela Raul
Publication year - 2013
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.12452
Subject(s) - spark plasma sintering , polyol , materials science , ferrimagnetism , amorphous solid , yttrium , yttrium iron garnet , analytical chemistry (journal) , fourier transform infrared spectroscopy , chemical engineering , phase (matter) , sintering , nuclear chemistry , magnetization , chemistry , crystallography , metallurgy , composite material , organic chemistry , polyurethane , physics , quantum mechanics , magnetic field , engineering , oxide
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 Y 3 Fe 5 O 12 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, 57 Fe Mössbauer spectrometry, and magnetization measurements.