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TA-5160

Tantalum Pentoxide

  • Formula: Ta2O5
  • |
  • CAS No: 1314-61-0
  • |
  • EC No: 215-238-2
Other Identifiers
Categories: Oxides
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Tantalum Pentoxide Physical Properties
  • Molecular Weight
    441.89 g/mol
  • Typical Purity
    99.99
  • Form

    Available as a powder or tablets (White & Black - High Laser Damage Threshold).

  • Theoretical Density
    8.2 g/cm³
  • Melting Point
    1,872°C (3,401.6°F)
Tantalum Pentoxide Optical Properties
  • Refractive Index
    2.1 at 500nm
  • Transmission Range
    350nm - 8µm
  • Evaporation Temperature
    1,950ºC
  • Evaporation Source
    Tantalum or graphite liner with electron-beam evaporation. 0.5nm/sec is a typical deposition rate for good crystallinity at a 300°C substrate temperature. As with all oxides that lose oxygen during the heat-up step, preconditioning is to be recommended. This requires a slow sweep of the e-beam over the tablets so that melting and loss of oxygen is controlled.
Tantalum Pentoxide Picture
Tantalum Pentoxide tablets

A layer of a batch of Tantalum Oxide tablets in a high temperature furnace