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Synthesis of SiFeC Magnetoceramics from Reverse Polycarbosilane‐Based Microemulsions
Author(s) -
Yu Yuxi,
An Linan,
Chen Yaohan,
Yang Daxiang
Publication year - 2010
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/j.1551-2916.2010.03869.x
Subject(s) - microemulsion , materials science , amorphous solid , transmission electron microscopy , ceramic , chemical engineering , nanoparticle , phase (matter) , heptane , aqueous solution , microanalysis , pulmonary surfactant , nanotechnology , chemistry , organic chemistry , composite material , engineering
In this paper, we report the synthesis of iron‐containing SiC(O) magnetoceramics using a reverse microemulsion technique. First, an aqueous iron nitrate solution as the internal phase and a polycarbosilane (PCS)–heptane solution as the continuous phase were emulsified in the presence of a surfactant to synthesize iron‐containing PCS (Fe‐PCS) reverse microemulsion systems. After the removal of water and heptanes, the Fe‐PCS precursors were pyrolyzed at 600°–1200°C to produce magnetoceramics. The structures and magnetic properties of the ceramics obtained were characterized by using X‐ray diffraction, transmission electron microscopy, electron probe microanalysis, and superconducting quantum interference device. The results showed that the ceramics contained Fe 3 Si nanoparticles, which dispersed in SiCO amorphous matrix. This unique structure makes the ceramics excellent soft ferromagnetic materials with a high magnetizability and negligibe hysteresis loops.