Ta

1. Introduce – Tantalum is a high-melting-point metal with high density, low thermal expansion, and resistance to acids and alkalis (it is not very reactive with aqua regia at temperatures below 150°C, but it corrodes in high-concentration strong acids at high temperatures) – When added to alloys, it raises the melting point, increases strength, and improves ductility, making it a material used in superalloys for jet engines, nuclear reactors, and missiles – It forms the most stable anodic oxide film among all metals; approximately 70% is used in the manufacture of electronic...