HIGH FLOW RATE ELECTROSTATIC FILTER RECOVERING NANOSTRUCTURED POWDERS SYNTHETIZED FROM LIQUID OR GASEOUS PRECURSORS BY LASER PYROLYSIS

摘要

The invention relates to a high flow rate electrostatic filter, recovering the nanostructured powders synthetized from liquid or gaseous precursors by laser pyrolysis, with applications in the technical field of electrostatic filters, nanotechnologies and laser technology. According to the invention, the filter comprises three stages of filtration, an electrostatic filtration, a gravity filtration, a mechanical and/or liquid filtration which are placed in a closed enclosure, with the pressure in the range of the preliminary vacuum, consisting of two metal covers (1, 7), made of stainless steel with connecting flanges (KF, CF) compatible with the upstream and downstream connected components, and a transparent cylindrical body (2) or a body with an eye slit, sealed from each other with resilient materials compatible with the materials to be processed, assembled by hollow rods (3); the closed enclosure is partitioned into two cylindrical components, an inner cylinder (6), made of stainless steel, and an outer cylinder (4), made of an electrically insulating material, and two electrically insulating transverse membranes (9, 11) with the function of supporting the cylindrical components and a hollow central electrode (13) with pre-ionizing electrodes (14) in its upper part and a fluid communication space; the mechanical or the liquid filter (8) is placed horizontally in the lower part and prevents the contamination of the surrounding environment with harmful nanostructured materials, and the voltage source (12) ensures a specific control adequate to each processed material in conformity with the accumulated experimental technical data.