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2005
Technology of materials
V 1500
Optimized Synthesis of the Elusive ε-Fe2O3 Phase via Sol—Gel Chemistry. —
of the title compound embedded in a SiO2 matrix with ε-Fe 2O3 phase per11- 245 Nanoparticles
centages exceeding 93% are synthesized using Fe(NO3)3 and Si(OEt)4 as precursors.
Optimized ε-Fe2O3 nanoparticles are ferrimagnetic and exhibit remarkably high values
of room-temperature coercitivity (HC = 20 kOe). The room-temperature magnetic
properties of the nanocomposites can be adjusted to obtain soft or hard magnetic
materials by controlling the particle size. — (GICH*, M.; et al.; Chem. Mater. 16
(2004) 25, 5542-5548; Inst. Cienc. Mater., CSIC, E-08193 Bellaterra, Barcelona,
Spain; Eng.) — W. Pewestorf
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