| 摘要 |
PURPOSE:To prepare a silicon carbide sintered product not causing the generation of cracks, etc., even on the preparation of thick products by calcining a molded product comprising silicon carbide, a carbon source and an organic binder, allowing melted metal silicon to permeate into the calcined product from one side to the other to the thickness direction and subsequently successively sintering the product from one side to the other. CONSTITUTION:A molded product comprising silicon carbide, a carbon source (e.g. carbon powder) and an organic binder (e.g. a phenolic resin) as main components is prepared and calcined. A carbonaceous net 2 is disposed on the inner peripheral surface of the prepared calcination product 1 in a contact state and the lower end of the net 2 is extended downward. The combined product is placed in a sintering oven heated at a high temperature and the lower end of the carbonaceous net 2 is immersed in melted metal silicon 4 charged in a container 3 disposed in the sintering oven. The combined product is sintered while impregnating the calcined product with the melted metal silicon by a capillary phenomenon from the inner peripheral surface of the calcination product l toward the outer peripheral surface, thereby providing a silicon carbide sintered product without the generation of stress in the calcination product 1. |
