| 摘要 |
PURPOSE:To produce an SiC whisker having the long fiber wherein the clearance distribution is uniform and the impurities are little by packing a mixed raw material such as Si, providing a production region of a produced aggregate to a position separated from the packed region and heating the mixed raw material. CONSTITUTION:A mixed raw material 2 contg. 1mol part SiO2, 1.5-5mol part C and 1/24-1/2mol part NaF is packed up to the height B in a base part of a crucible 1 made of graphite and a production region space 3 of just upper part thereof is constituted of a wall part made of graphite and >=5 times volume of the volume of the raw material 2 is held and a practically same shape as a shape of an article wherein an aggregate of an SiC whisker to be produced is used as a skeleton is formed. Then an inert gas such as Ar is introduced into the spaces 3, 13, 15 through the introduction pipes 11, 17 and an inflow port 18 and the mixed raw material 2 is heated at the temp. in the range within 1,400-1,700 deg.C for a prescribed period with a heater 6 in the nonoxidizing atmosphere. |
