Direct combustion synthesis of SiC powders

摘要

In this study,we examine the possibility to directcombustion synthesize SiC powders from elements using fourreactant combinations (Si and graphite; Si and carbon black;ground Si and carbon black; both Si and carbon black ground)under two reacting environments (heated by an oxy-acetylene torchin air, and heated by tungsten coils in vacuum). The experimentalresults showed that high-purity SiC product with no oxide presentwas obtained if pellet, made of Si and carbon black, was burned byan oxy-acetylene torch in air. Also, ground reactant particlesyielding deteriorated effect on product conversion is also discussed.