Synthesis of Ultrafine SiC Powders from Carbon-Silica Hybridized Precursors with Carbothermic Reduction
作者： Masaki Narisawa
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摘要: Inorganic-organic hybrid gels were prepared by simultaneous condensation of the liquid mixture ethyl silicate, borate and water soluble phenol resin with low molecular weight. The mixtures changed into lightly colored transparent after a catalyst addition stirring. obtained crushed, dried fired in controlled conditions to yield inorganic precursors. Since tailored precursors mainly consisted SiO2 carbon, silicon carbide was formed heat treatments an Ar atmosphere beyond 1773 K carbothermic reduction. properties morphology powders terms starting precursor compositions reduction investigated SEM, XRD TG-DTA analysis.
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