MANUFACTURING METHOD OF SILICON CARBIDE NANOFIBERS FROM EXFOLIATED GRAPHITE AND AMORPHOUS SILICA

摘要

PURPOSE: A manufacturing method of silicon carbide nano fiber is provided to mass produce by having a simple manufacturing process and using low price raw materials, thereby applying in various fields such as a composite material and the like. CONSTITUTION: A manufacturing method of silicon carbide nano fiber comprises the following steps: (1 step) manufacturing expanded graphite by heat treating graphite which goes through an acid treatment; (2 step) mixing amorphous silica with organic solvent and uniformly dispersing the same to manufacture a mixture; (3 step) inserting amorphous silica powder between the expanded graphite layers by using vacuum desiccators after mixing the expanded graphite obtained in the previous step 1 with the amorphous silica solution obtained from step 2; (4 step) synthesizing graphite-silicon carbide nano fiber by heat treating under a reduction condition after drying the composite powder obtained from the step 3; and removing the graphite by heat treating the composite powder (graphite-silicon carbide) obtained from the previous step 4 under an oxidizing condition.