Abstract
A new technique of mass-producing silicon carbide whiskers at a low cost is introduced in this paper. Silicon carbide whiskers are synthesized by double-heating technique with the activated carbon and silica gel as raw material and CoCl2 as catalyst. The results indicate that the silicon carbide whiskers with the average diameter of 0.2μm, length of 10-50μm and high content of 81% can be obtained at a lower temperature of 1300°C and a shorter time of 1.5h. Compared with the conventional heating, the double-heating technique is suitable for realizing the scaled production because of the lower whiskerssynthesizing temperature, shorter reaction time and greater output.
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