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Physics
The new technology process for production of nanopowders of different substances in different gases is proposed. The process includes the evaporation of solid natural (or industrial) raw materials (like quartz in case of silica) with the consequent fast cooling of the high temperature vapor and condensation of nanoparticles. The size of them can be different (in the range from 10 to 500 nanometers).
For the evaporation the electron beam accelerator of continuous action is employed. The main component of the pilot facility - one of the ELV-series electron beam accelerators (with power 100 kilowatt), which are widely exported by BINP (Novosibirsk) - is the high-tech part of the process. It has a system of outlet of concentrated electron beam directly into the atmosphere with the power density up to 5000 kilowatt per square centimeter outside a vacuum (at atmospheric pressure). The process provides the temperature which is enough for the evaporation of any material, with heating rate higher then 1000 degree per second, so, the fine powders of the variety of materials can be produced. The process developed is environmentally friendly and does not include any hazardous and toxic materials and ingredients, in difference with existing commonly used industrial processes. It includes less number of stages that is the additional advantage.
Through the developed technique the variety of nanopowders of different substances can be produced at the large yield (up to tens of kilograms per hour). At the moment the following substances had been manufactured: oxides - silica and silicon oxide (SiO2, SiO), magnesia (MgO), alumina (Al2O3), copper oxide (Cu2O); metals – tantalum (Ta), molybdenum (Mo), nickel (Ni), aluminum (Al), silver (Ag), and some others, in different gases; semiconductor – silicon (Si); nitrides – of aluminum (AlN), of titanium (TiN); and other substances, in particular, fullerens. The gases used: air, argon, nitrogen, helium, xenon.
The method has the clear advantages and can be used as the base for the industrial scale technology. The marketing study for the nano- silica had been conducted and different variants of establishment of new enterprise had been estimated through the completion of business plan. The results show the high efficiency of nanopowder manufacturing under this process. The nanopowders then can be used in many different applications.
Note. Abstracts are published in author's edition
Last update: 06-Jul-2012 (11:52:45)