Materials overview
It barely dissolves in strong acids, and its surface oxide film is electrically stable. That is why electronic and semiconductor parts in corrosive environments use tantalum.
It is a refractory metal with a melting point of 3,017℃, and its corrosion resistance is close to that of glass.
It does not dissolve in most acids, aqua regia included, so it is used in chemical plant linings and heat exchangers, and its good biocompatibility takes it into medical implants as well.
Key Property Values
These are the values engineers check first at the design stage. Actual delivery specifications follow the per-lot test report.
| Item | Value | Description |
|---|---|---|
| Melting point | 3017 °C | After tungsten and rhenium |
| Density g/cm³ | 16.7 | A high-density metal |
| Thermal conductivity W/m·K | 57 | Low among the refractory metals |
| Thermal expansion µm/m·K | 6.3 | At room temperature |
| Corrosion environment | Strong acids | Barely reacts with hydrochloric or nitric acid |
| Supply grade | 1 | Pure Ta 99.95% |
Figures are representative values. The thermal expansion coefficient is taken from published literature and needs review before release.
Key Advantages
How these figures translate into advantages in actual processes.
Outstanding corrosion resistance
It barely reacts with aqua regia, nitric acid or sulfuric acid at room temperature. It is used as the inner wall material of plant handling corrosive chemicals.
High melting point · vacuum performance
A melting point of 3,017℃ and low vapor pressure suit heating elements and heat shield structures in high-vacuum environments.
Ductility · formability
Its ductility is good for a refractory metal, so thin sheet forming and deep drawing are possible. Even complex geometries come out of a single sheet.
Supply Forms · Machining Options
| Form | Specification |
|---|---|
| Wire · Rod stock | On request |
| Sheet · Plate | t 0.10 – 40.0 mm |
| Rod · Bar | Ø 3.0 – 120 mm |
| Ribbon · Strip | Width 1 – 360 mm |
Custom Machining Capability
- Cutting to drawing dimensions · CNC / MCT machining
- Wire EDM · laser machining · welded assemblies
- Forming (bending · deep drawing) and surface treatment
- The same tolerances from a single prototype to full production
Related Products · Applications
Semiconductor equipment parts
Structural parts for wet processes and corrosive in-chamber environments
Electrodes · Crucibles
High-temperature vessels for melting reactive metals
Sputtering targets
Ta targets for barrier thin-film deposition
Plate
Corrosion-resistant lining and heat exchange parts
