1、 Definition

Tantalum plate is a sheet made by rolling tantalum metal as raw material. Tantalum is a rare transition metal that often coexists with niobium in nature. It needs to be extracted through ore decomposition and tantalum niobium separation processes. Tantalum plates have high melting points, corrosion resistance, and excellent plasticity, and are widely used in fields such as chemical engineering and electronics.

2、 Nature

1. Physical properties

Basic parameters: density of 16.68 g/cm ³, melting point of 2980 ℃, extremely low coefficient of thermal expansion, low vapor pressure at high temperatures.

Processing performance: Good ductility, annealed hardness of about 140 HV, can be cold-rolled to thin foils below 0.01 mm or drawn into fine wires.

Thermal conductivity: After cold rolling, the thermal conductivity is stable and suitable for high-temperature heat dissipation scenarios.

2. Chemical properties

Corrosion resistance: It has almost no reaction to strong acids such as hydrochloric acid, concentrated nitric acid, aqua regia, etc. at room temperature. Corrosion resistance comes from the dense Ta ₂ O ₅ oxide film on the surface.

Exception environment: High temperature concentrated sulfuric acid, hydrofluoric acid, and molten strong alkali can corrode tantalum plates.

High temperature stability: Stable in air below 500 ℃, oxidation intensifies at higher temperatures, requiring inert gas protection for processing.

3、 Summary

Tantalum plate, with its unique physical and chemical properties, has become the preferred material for extreme corrosion and high temperature environments. However, due to cost and processing difficulties, it is mostly used in high value-added fields.