Patent ID: 9700990
Date: 2017-07-11
CPC Classifications: B24C

Claim:
1. A nozzle for generating high-speed, uniform nanoparticles by passing a particle generation gas formed of carbon dioxide through the nozzle, the nozzle comprising: a dilating portion of a shape increasing a cross-sectional area toward an outlet side of the nozzle; and an orifice provided at, an inlet of the dilating portion to expand the particle generation gas, wherein the dilating portion sequentially includes a first dilating portion and a second dilating portion, and an average dilation angle of the second dilating portion is wider than a dilation angle of the first dilating portion, wherein a connection portion for connecting the second dilating portion to the first dilating portion is formed to have a same dilation angle as the dilation angle of an outlet side of the first dilating portion, and wherein the connection portion is formed to gradually increase the dilation angle toward a center of the second dilating portion and decrease the dilation angle from the center toward the outlet side.