| abstract |
A method for producing ultrafine solid particles, comprising: (a) introducing a solid precursor into a plasma chamber; (b) heating the precursor by means of a plasma as the precursor flows through the reaction chamber, yielding a gaseous product stream; (c) contacting the gaseous product stream with a plurality of quench streams injected into the reaction chamber through a plurality of quench gas injection ports, wherein the quench streams are injected at flow rates and injection angles that result in the impingement of the quench streams with each other within the gaseous product stream, thereby producing ultrafine solid particles; and (d) passing the ultrafine solid particles through a converging member. |