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Tantalum has high temperature resistance, good strength and stiffness, and is a high-quality material for making heating parts, heat-insulating parts and charging vessels for vacuum high-temperature furnaces. The main use of tantalum is to make capacitors. Tantalum capacitors are currently the best performing capacitors. Tantalum wire is used as the anode lead of tantalum capacitors because tantalum has excellent physical and chemical properties, such as high melting point, small thermal expansion coefficient, excellent toughness and ductility, especially its excellent corrosion resistance, and is resistant to hydrochloric acid, Concentrated nitric acid and “aqua regia” showed no reaction. Tantalum wire has also found important applications in the medical field. Because it is biocompatible, human muscles can grow on it, so it can be used to compensate for muscle tissue and suture nerves and tendons.

Tantalum and niobium are high-quality materials that are resistant to acid, alkali and liquid metal corrosion. They can be used in the chemical industry to make digesters, heaters, coolers, and various utensils and devices.

Metal niobium has high temperature resistance and strength, and it still has sufficient strength, good plasticity and thermal conductivity above 1000°C. Superconductivity is best at extremely low temperatures. For example, its resistance is close to zero at about minus 260°C. It is currently the most important superconducting material.

Niobium wire and niobium-zirconium alloy wire are widely used in fields such as chemistry, electronics, aviation and aerospace due to their high melting point, corrosion resistance, and good cold working properties. Adding zirconium to niobium can significantly improve the oxidation resistance and strength of the material. Niobium and niobium-zirconium alloy wire are widely used in the manufacture of high-pressure sodium lamps and electrolytic capacitor anode leads.