Physical and Chemical Properties of Tantalum Wire
Mechanical Properties
Tantalum wire is known for its excellent mechanical properties. It has a high ductility, making it well suited for processes such as bending, stamping, and pressing. The material has high temperature strength and maintains its structural integrity even under extreme conditions. Tantalum wire has a tensile strength range of 300 to over 1000 MPa in soft, semi-hard, and hard states. It has an ultimate tensile strength of at least 25 KSI (172 MPa), a yield strength of at least 15 KSI (103 MPa), and an elongation of at least 25%.
Thermal Properties
Tantalum wire has excellent thermal properties, making it suitable for high temperature applications. It has a very high melting point of approximately 5463°F (3017°C), allowing it to withstand extremely high temperatures without melting. The material also exhibits low thermal expansion, with an average CTE of 3.60 µin/in-°F (6.48 µm/m-°C) over the range of 68-932 °F (20-500 °C). Additionally, the thermal conductivity of tantalum wire is 384 BTU-in/hr-ft²-°F (55.3 W/m•K) between 68-212 °F (20-100 °C), ensuring efficient heat dissipation.
Electrical and Conductive Properties
Tantalum wire is highly regarded in electrical applications due to its high electrical conductivity. It is known for its superconducting properties, making it a top choice for the production of tantalum electrolytic capacitors due to its excellent dielectric properties and ability to form a uniform, stable oxide. These properties ensure reliable performance and long life of electronic components.
Density and Specific Heat
Tantalum wire has a density of 0.6 lb/in³ (16.65 g/cm³), which helps it to be strong and durable. Its specific heat at 212°F (100°C) is 0.0336 BTU/lb-°F (0.141 J/g-°C). These properties are critical for applications that require a material that can withstand high energy and temperature fluctuations without degradation.
Corrosion Resistance
One of the most notable chemical properties of tantalum wire is its excellent corrosion resistance. Tantalum forms a protective oxide layer that protects it from acids and liquid metals. This makes it highly corrosion resistant and suitable for use in the chemical industry and other applications where corrosion resistance is critical.
Biocompatibility
Tantalum wire is highly biocompatible, meaning it will not react or cause irritation with body fluids. This makes it an ideal material for medical applications, including prosthetic implants and surgical sutures. Its biocompatibility ensures that it can be safely used in the human body without causing adverse reactions.
Reactivity
Tantalum has a low reactivity with most acids and bases, further enhancing its corrosion resistance. This low reactivity ensures that tantalum wire remains stable and durable in a variety of chemical environments, making it a reliable material for long-term applications.