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However, the nanopowders of niobium and tantalum obtained in the reconstruction of pentachloride have a reduced threshold of pyrophoricity due to the adsorbed layer of hydrogen chloride on their surface.
The main goal of this experimental research was to study and optimize the plasmochemical process of the production of tantalum and niobium nanopowders (20-150 nm) from their pentachlorides at pilot scale in the heated up to 3500 K hydrogen stream in a plasmatron.
The experimental studies and pilot scale tests of niobium and tantalum pentachlorides reduction were carried out in the heated up over 3000 K plasma stream from the arc plasmatron with a power of 15-100 kW.
To study this phenomenon, the rate of dosing pentachlorides was varied in the range from 1 to 10 g/min.
5a) indicated that increasing the pentachlorides dosing rate led to a reduction in the specific surface area of nanopowders.
During the chemical vapor deposition process, the tantalum metal crystallizes from tantalum pentachloride gas onto the three-dimensional lattice structure of the Hedrocel.