Apparatus for continuously preparing nanopowder in which evaporation amount and speed of raw material are adjusted

Abstract

An apparatus for continuously preparing nanopowder in which an evaporation amount and speed of a raw material are adjusted is proposed. In one aspect, the apparatus includes a reaction chamber evaporating a raw material using a plasma electrode and a crucible, and a raw material supplier connected to a first side of the reaction chamber and supplying the raw material to the reaction chamber. The apparatus may also include a conveying film moving along a closed loop while capturing and conveying the raw material that has been evaporated or nanopowder that has been crystallized at an upper portion in the reaction chamber. The apparatus may further include a collector connected to a second side of the reaction chamber and collecting the nanopowder conveyed by the conveying film.

What is claimed is: 
     
         1 . An apparatus for continuously preparing nanopowder in which an evaporation amount and speed of a raw material are adjusted, the apparatus comprising:
 a reaction chamber configured to evaporate a raw material using a plasma electrode and a crucible;   a raw material supplier connected to a first side of the reaction chamber and configured to supply the raw material to the reaction chamber;   a conveying film configured to move along a closed loop while capturing and conveying the raw material that has been evaporated or nanopowder that has been crystallized at an upper portion in the reaction chamber; and   a collector connected to a second side of the reaction chamber and configured to collect the nanopowder conveyed by the conveying film,   wherein the reaction chamber includes a rotation-elevation device including:   a rotator configured to rotate the crucible; and   an elevator configured to independently move up and down the crucible and the plasma electrode,   wherein the crucible is configured to be rotated and the crucible and the plasma electrode are configured to be moved up and down by the rotation-elevation device such that an evaporation amount and an evaporation speed of the raw material that is evaporated in the reaction chamber are adjusted.   
     
     
         2 . The apparatus of  claim 1 , wherein the rotator includes:
 a first gear coupled and fixed to a lower end portion of a crucible center shaft connected to the crucible through the reaction chamber; and   a second gear being in mesh with the first gear and being rotated by operation of a motor.   
     
     
         3 . The apparatus of  claim 1 , wherein the elevator includes:
 a first elevation plate connected to a lower end of the crucible center shaft extending downward from the crucible electrode connected to the crucible, fitted on lower ends of a plurality of support rods extending downward from a fixed plate; and   a second elevation plate coupled to a lower end of the electrode center shaft of the plasma electrode passing through the fixed plate and the first elevation plate, and thread-fastened to a screw shaft, which is rotated by operation of a motor, to be moved up or down by clockwise or counterclockwise rotation of the screw shaft.   
     
     
         4 . The apparatus of  claim 3 , wherein the second elevation plate and first elevation plate are configured to be moved up and down simultaneously or with an interval. 
     
     
         5 . The apparatus of  claim 1 , wherein the plasma electrode includes:
 a tip fastened to a longitudinal front end adjacent to the crucible and made of tungsten or graphite;   an electrode center shaft vertically extending from another longitudinal end; and   a connection port disposed on a side of the electrode center shaft and connected with a power source.   
     
     
         6 . The apparatus of  claim 1 , wherein the crucible includes:
 a first track recessed downward;   a second track having an inner circumference larger than an outer circumference of the first track and recessed downward; and   an isolation projection disposed between the first track and the second track and configured to isolate the first track and the second track from each other.   
     
     
         7 . The apparatus of  claim 1 , wherein the raw material supplier includes an automatic feeder including:
 a feeding housing;   a feeding screw spirally disposed in the feeding housing;   a feeding motor configured to operate the feeding screw; and   a feeding nozzle connected to the feeding housing and configured to supply the raw material into the reaction chamber.   
     
     
         8 . The apparatus of  claim 7 , wherein the automatic feeder comprises a plurality of automatic feeders and is configured to supply the raw material of the same substance or the raw material of different substances to a first track and a second track of the crucible. 
     
     
         9 . The apparatus of  claim 1 , wherein each of both sides of the conveying film is supported by a conveying shaft that is horizontally elongated, and wherein cooling water is configured to be supplied into the conveying shaft. 
     
     
         10 . The apparatus of  claim 1 , wherein the collector includes:
 a first capturer configured to capture nanopowder separated from the conveying film;   a second capturer connected with the first capturer and configured to capture and transfer nanopowder captured through the first capturer; and   a powder receiver configured to receive nanopowder moved through the second capturer.