METHOD OF PREPARING HIGH-PURITY NANOPOWDERS AND DEVICE TO THIS END Russian patent published in 2010 - IPC B82B3/00 B22F9/12 B23K26/12 H01S3/02 

FIELD: physics.

SUBSTANCE: method involves heating a workpiece in a focal zone using combined laser-optical radiation. Heating is done using a polychromatic radiation source which activates the near-surface volume of the workpiece and a high-power concentrated pulsed radiation laser. After that the vaporous material is placed in a cooled coil for coagulation and nanopowder particles are precipitated. The device has a reactor, a gas pipe for feeding gas into the reactor, a radiation source, an expansion chamber with a cooled coil for coagulation of the evaporated material, and fitted with a cone-shaped dust collector. The radiation source is composite and consists of a light-beam type source of polychromatic radiation and high specific power concentrated coherent pulsed radiation laser.

EFFECT: obtaining nanopowder with given range of dimensions, wide field of use of the powder.

2 cl, 7 dwg