Tantalum wire of the same specifications is produced by using different metallurgical grade tantalum powder as raw material through the same processing technology. After analyzing the mechanical properties, oxygen brittleness resistance, hydrogen brittleness resistance and surface quality of tantalum wire products, it is determined that ordinary tantalum powder must be used to make tantalum wire for vapor deposition. In addition, the tensile strength of tantalum wire can be increased by increasing the processing rate.
50%-70% of the world's tantalum in the form of capacitor grade tantalum powder and tantalum wire is used to make tantalum capacitors. Because the surface of tantalum can form a dense and stable amorphous oxide film with high dielectric strength, it is easy to accurately and conveniently control the anodic oxidation process of capacitors, and the tantalum powder sintered block can obtain a large surface area in a small volume. Therefore, tantalum capacitors have high capacitance, low leakage current, low equivalent series resistance, good high and low temperature characteristics, long service life, and excellent comprehensive performance, which is difficult to compare with other capacitors. It is widely used in communications (switches, mobile phones, pagers, fax machines, etc.), computers, automobiles, home and office appliances, instrumentation, aerospace, national defense and other industrial and technological sectors.
Tantalum wire is a kind of filamentous tantalum material made by rolling, drawing and other plastic processing methods. The process flow of tantalum wire is: raw material (tantalum powder)→ mixing → molding → vertical melting → rotary forging → intermediate annealing → drawing → finished product annealing → quality inspection → packing and storage.
Tantalum has a series of excellent properties such as high melting point, low steam pressure, good cold working performance, high chemical stability, strong resistance to liquid metal corrosion, and high dielectric constant of surface oxide film. Therefore, tantalum has important applications in high-tech fields such as electronics, metallurgy, steel, chemical industry, cemented carbide, atomic energy, superconducting technology, automotive electronics, aerospace, medical health and scientific research, and is an extremely versatile functional material.
