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The production methods of niobium wire mainly include the following:
Vacuum carbon reduction : In a vacuum carbon tube furnace, the affinity of carbon to oxygen is greater than that of niobium. it uses carbon as a reducing agent to reduce Nb₂O₅ ₅ niobium ₅. It is further processed into niobium filament .
Thermite reduction : The reduction melting reaction is carried out in a vessel without external heating. products are separated and purified, can be processed into niobium filament. This method is simple and easy to use, , but the purity of the product is low, needs to be further purified .
Electrolysis method : includes two methods: molten salt electrolysis and aqueous solution electrolysis. the equipment for producing niobium powder by molten salt electrolysis is simple and the cost is low . is one of the important methods for producing niobium wire .
Chemical vapor deposition (CVD method) : gaseous chemicals are degraded into solid materials under high temperature, is deposited on the surface of niobium powder into niobium filaments by controlling reaction conditions.
Each of these methods has advantages and disadvantages, which method is chosen depends on the production scale, cost, purity requirements and other factors.
