PRODUCTION OF SILICON CARBIDE POWDER

摘要

PURPOSE:To produce SiC powder of high-purity and having uniform particle diameter by allowing SiO2 to react with C in plasma flames in a method for performing the reaction. CONSTITUTION:A couple of electrodes 2, 3 provided on the inside of a reaction vessel 1 are connected with a power source 5 and plasma flames 4 are generated in the space between both electrodes. At least one of both electrodes, for example the electrode 2 is made of a hollow electrode and the powder 7 of a mixed raw material consisting of arbitrary amount of SiO2 and C is introduced into the plasma flames 4 via the hole 2a of the hollow part of the electrode 2 from a microfeeder 6 together with carrier gas incorporated in a cylinder 8. SiO2 powder is allowed to react with C powder to produce SiC and CO and this produced SiC powder is carried to the upper part by both carrier gas and CO of reaction gas and collected in a cyclone 9.