Tantalum

Tantalum is a dense, ductile transition metal with atomic number 73. Its resistance to corrosion and ability to form a stable insulating oxide make it valuable in electronics and chemical-processing equipment.

Tantalum capacitor: An electrolytic capacitor that uses tantalum metal as its anode and a thin tantalum oxide layer as its dielectric. Its compact size and stable capacitance make this the metal’s best-known electronic application.
Passivation: The formation of a protective surface layer that slows a material’s further chemical reaction or corrosion. A tenacious oxide film protects tantalum in environments that attack many metals.
Anders Gustaf Ekeberg: A Swedish chemist who identified tantalum in 1802 while studying minerals from Scandinavia. Ekeberg’s analysis established tantalum as a distinct element.
Titanium: A strong, low-density transition metal with atomic number 22, known for corrosion resistance and use in aerospace and implants. Titanium offers a much lighter structural alternative, while tantalum excels in especially corrosive settings.
Tantalum carbide: A very hard, high-melting ceramic compound of tantalum and carbon used in cutting tools and high-temperature materials. Its heat resistance extends tantalum’s applications beyond corrosion-resistant metal equipment.
Dielectric: An electrically insulating material that can be polarized by an applied electric field. Tantalum pentoxide serves as the thin dielectric separating charge in tantalum capacitors.
Tantalite: A tantalum-rich oxide mineral, commonly occurring with niobium and iron or manganese. Tantalite is a principal natural source of tantalum.
Aluminum electrolytic capacitor: An electrolytic capacitor that uses aluminum foil and aluminum oxide as its anode and dielectric. Aluminum capacitors can offer higher capacitance or lower cost, while tantalum parts are often more compact and stable.
Tantalum implant: A medical implant or implant component made from tantalum, valued for biocompatibility and resistance to bodily corrosion. Tantalum’s compatibility with tissue supports specialized orthopedic and reconstructive implants.
Electrolytic capacitor: A capacitor that uses an oxide layer on a metal anode as its dielectric and an electrolyte as the counter-electrode. Tantalum capacitors are one metal-specific member of this capacitor family.

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