Journal of Industrial and Engineering Chemistry, Vol.13, No.1, 27-32, January, 2007
Superparamagnetic Si3N4-Fe-Containing Ceramics Prepared from a Polymer-metal Complex
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Functional non.oxide ceramics derived from liquid ceramic precursors with transition metal compounds have been studied for use under mechanically harsh conditions and high temperatures. Although the synthetic routes toward functional ceramics are challenging because of the reactivity and chemical properties of the elements, we introduced a simple route to fabricate magnetic non.oxide ceramics from commercially available sources. After dissolving ferric chlorides in THF, the polyvinylilazane (PVS) was added to the solution. The molecular weight started increasing within a few minutes at room temperature, and the color became dark yellow. Particles of the mixed compound were obtained through evaporation of the THF. Curing at 130 ℃ was then undertaken, and the cured compound was pyrolyzed in the 500∼1000 ℃ temperature range under a nitrogen atmosphere. The obtained ceramics were analyzed using XRD, FT.IR spectroscopy, TGA, and TEM.
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