Tantalum Foil

Tantalum foil is a flake material made of Tantalum. Tantalum is a gray metallic element with the chemical symbol Ta. Also a very rare noble metal, it is a chemical element in the fifth cycle with atomic number 73. Tantalum has a very high melting point and corrosion resistance, allowing it to withstand extreme environments, including strong acids and high temperatures. Therefore, Tantalum is an important structural material widely used in chemical, electronic, medical, aerospace and other fields

The chemical composition of tantalum strip is mainly tantalum element, and other impurity elements such as iron, copper, chromium, molybdenum, zirconium and so on. The content of these impurity elements is usually very low, less than 1%.

Tantalum foil has good chemical stability and will not react with most chemicals, including strong acid, weak acid, lye or hydrogen oxide. In addition, tantalum metal foil has excellent corrosion resistance and can be used in extreme environments, such as high temperature, high pressure and strong acid environments.

• High melting point: 2996°C;
• High density: 16.69g/cm³;
• Excellent chemical stability: it can be stored in oxygen, hydrogen, nitrogen, and water vapor for a long time without being oxidized, and it can also resist the erosion of corrosive substances such as acid, alkali, and oxygen chlorination;
• Extremely low thermal conductivity: very suitable for liquid helium refrigeration;

The production process of tantalum foil is as follows:

1) Raw material procurement and inspection: purchase high-purity tantalum block or tantalum powder, and conduct chemical analysis and physical performance testing.

2) Preparation of tantalum powder: put tantalum block or tantalum powder into a special reactor, and react with hydrogen or methane gas to prepare tantalum powder.

3) Preparation of metal tantalum: sinter tantalum powder under high temperature and high-pressure environment to produce tantalum billet.

4) Processing of tantalum billet: Cut the tantalum billet into appropriate size, and then perform hot rolling or cold rolling processing to prepare the tantalum plate or tantalum strip.

5) Surface treatment: The tantalum plate or tantalum metal foil is subjected to surface treatment such as mechanical processing and chemical polishing to make the surface smoothness meet the requirements.

 

Tantalum foil can be applied in the following fields:

1) Electronic industry: It is often used as the electrode of capacitors, especially in high-frequency circuits, because of its excellent high-temperature resistance, corrosion resistance, and stability.

2) Medical devices: Due to the biocompatibility of tantalum strip, it is widely used in the manufacture of medical devices in the human body, such as prostheses and cochlear implants in bone repair surgery.

3) Aviation and aerospace industry: Due to its high melting point and corrosion resistance, tantalum metal foil is used as a material in aviation and aerospace devices, such as parts in engines, boosters, rocket nozzles, etc.

4) Chemical industry: It can resist the corrosion of various chemical substances, so it can be used to manufacture parts and pipes in chemical reactors.

In general, tantalum foil has a wide range of applications, mainly in industrial and technological fields that require high performance and high reliability.

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