| 摘要 |
<p>A process for preparing silicon carbide by carbothermal reduction involves rapidly heating a particulate reactive mixture of a silica source and a carbon source to form a product which shows improved uniformity of crystal size. The product of this process can be used to form a densified part. The process comprises: (1) passing a particulate reactive mixture (2, 4) of a silica source and a carbon source into a reactor having (a) a reactant transport member (6), the reactant transport member having a wall defining a hollow conduit, the wall having a cooling means and being further characterized as having a concentric inner wall defining an inner annular space (20), the inner annular space having an inlet and being open at the bottom such that a gas can be flowed therethrough; (b) a reactor chamber (1, 6), the reactor chamber having a wall (2, 6) defining a reaction zone (2, 8), the chamber being in fluid connection with the reactant transport member.</p> |
