How to prepare high-performance niobium wire in industry?

The preparation of niobium wire relies on high-purity raw materials (≥99.95%) and precision processing technology. The core steps include:
Surface treatment:
The niobium rod is pickled in a mixture of hydrofluoric acid + nitric acid + water (1:1:2), and the copper tube is cleaned in dilute nitric acid to ensure a clean interface.

Compound processing:
The oxygen-free copper tube is coated with the niobium rod, and the Cu/Nb interface is metallurgically bonded through a single-pass large deformation drawing (processing rate 20–30%).

Subsequent forming:
Multi-core wires need to be hot extruded or assembled in close-packed hexagonal form (bronze method).