Synthesis of SiC Ceramics from Coal Gangue


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The synthesis and the sintering of SiC from coal gangue by carbothermal synthesized in N2 atmosphere are studied. The material, 5 percent carbon black added and sintered at 1400°C for 2 hours, had good properties and a bending strength of 137.8MPa. Too high temperature or too long holding time made the properties of the material to decrease. β-SiC found by observing the microstructure is a major crystal phase in the synthesized ceramics, which would lead to fine mechanical properties.



Materials Science Forum (Volumes 486-487)

Edited by:

Hyung Sun Kim, Sang-Yeop Park, Bo Young Hur and Soo Wohn Lee




S. H. Jia "Synthesis of SiC Ceramics from Coal Gangue", Materials Science Forum, Vols. 486-487, pp. 378-381, 2005

Online since:

June 2005





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[4] 5 time /min density /g. cm -3 density 20 30 40 50 60 70 flexural strength /MPa flexural strength Fig. 5 Effect of the holding time on bulk density and flexural strength (1400℃℃℃℃).

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