Tantalum is the third most refractory metal after tungsten and rhenium, with a melting point of 2980℃. In addition, tantalum has a series of excellent properties such as low vapor pressure, good cold workability, high chemical stability, strong resistance to liquid metal corrosion, and large dielectric constant. Surface oxide film. Therefore, tantalum and tantalum wire have important applications in high-tech fields such as solid alloys, atomic energy, superconducting technology, automotive electronics, aerospace, medical care, scientific research, etc. In this article, we will learn about the classification and uses of tantalum wire.
Classification of Tantalum Wire
Tantalum wire can be classified according to its chemical purity, performance, use and state.
1. Tantalum wire can be divided into 3 categories according to its purity: metallurgical tantalum wire, purity 99.0%Ta; high purity tantalum wire, purity 99.0%-99.9%Ta; ultra-high purity tantalum wire, purity 99.9%-99.99%Ta.
2. Tantalum wire can be divided into 4 categories according to performance: chemical corrosion resistant tantalum wire; high temperature resistant and high strength tantalum wire; oxygen brittle tantalum wire; capacitor tantalum wire.
3. Tantalum wire for capacitors can be divided into 3 categories according to use: tantalum wire for solid tantalum electrolytic capacitor leads; tantalum wire for liquid tantalum electrolytic capacitor leads; tantalum wire for capacitors with reliability indicators.
4. According to the state, capacitor tantalum wire can be divided into three categories: soft state, tensile strength σb=300~600MPa; semi-hard state, tensile strength σb=600~1000MPa; hard state, tensile strength σb>1000MPa.
Uses of tantalum wire
1. Tantalum wire is most widely used in the electronics industry, mainly for anode leads of tantalum electrolytic capacitors. Tantalum capacitors are the best capacitors, and about 65% of the world’s tantalum is used in this field.
2. Tantalum wire can be used for muscle tissue compensation and suture of nerves and tendons.
3. Tantalum wire can be used for heating components in vacuum high-temperature furnaces.
4. Highly resistant to oxidation, brittle tantalum wire can also be used to make tantalum foil capacitors. It can work in potassium dichromate at high temperatures (100°C) and extremely high flash voltages (350V).
5. In addition, tantalum wire can also be used as a vacuum electron cathode emission source, ion sputtering, and spraying material.