Synthesis of SiFeC Magnetoceramics from Reverse Polycarbosilane-Based Microemulsions

    Authors

    Y. X. Yu; L. N. An; Y. H. Chen;D. X. Yang

    Comments

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    Abbreviated Journal Title

    J. Am. Ceram. Soc.

    Keywords

    POLYMER-DERIVED CERAMICS; SINGLE-SOURCE PRECURSOR; MAGNETIC-PROPERTIES; BORAZINE PRECURSORS; SILICON-CARBIDE; COMPOSITES; PYROLYSIS; NANOPARTICLES; PARTICLES; NANOTUBES; Materials Science, Ceramics

    Abstract

    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 degrees-1200 degrees 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.

    Journal Title

    Journal of the American Ceramic Society

    Volume

    93

    Issue/Number

    10

    Publication Date

    1-1-2010

    Document Type

    Article

    Language

    English

    First Page

    3324

    Last Page

    3329

    WOS Identifier

    WOS:000282637200082

    ISSN

    0002-7820

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