| 摘要 |
A process for the production of beta -type silicon carbide whiskers comprises mixing carbon powder with silicon dioxide powder, packing the resultant mixture in a reaction container in a bulk density of not more than 0.23 g/cm<3>, and heating the mixture for reaction in an atmosphere of inert gas at a temperature in the range of 1,500 DEG to 2,000 DEG C. A continuous reaction furnace suitable for the process has a core tube 2 axially disposed through a furnace shell 1, coolers 3,3' and air tubes disposed fast around the core tube and paired near opposite open ends of the furnace shell, means 11 for feeding reaction containers 10 in a row disposed at the uppermost part of the core tube, and means 16 for supporting and carrying out the reaction containers 10a, 10b disposed at the lowermost part of the core tube, and, therefore, enables the mixture of raw materials under treatment held in the reaction containers to be continuously subjected to a thermal treatment therein. <IMAGE> |
