| 摘要 |
The nitride and/or carbonitride of Ti and, if necessary, other metals in Gps. IVa, Va and VIa of the periodic table is mfd. in the form of spherical powder particles of an average size of more than 2 mu m and with a narrow grading spectrum, by heating a reaction mixt. of Ti and, if necessary, other metals in the form of the metal, the oxide, the carbide, the nitride and/or the carbonitride and, as required, a C-contg. material in a reactor, under a N-atmos. at 1400-2000 degrees C. Gaseous reaction prods. are removed and N2 or a N2-producing gas is passed through or over the reaction mixt.. The reactor is evacuated to a pressure of at most 10 mbar and then flooded with N2 to a pressure of 40-1000 mbar. The evacuation and flooding cycle is repeated up to 5 times and the reactor contents are then cooled. |
