|EC / List #:||215-238-2|
|Market Focus:||High Purity Thin Film Coating|
A high index coating material, with transmission from the near ultra-violet to the infrared, (8um). Due to its refractive index being < 2 it is well suited for HL multilayer coatings in conjunction with silicon dioxide for laser applications. This oxide also finds applications in electronics Special mixtures containing tantalum oxide can be custom synthesized.
|Formula Mass:||441.89 g/mol|
Available as a powder or tablets (White & Black - High Laser Damage Threshold).
|Refractive Index:||2.1 at 500nm|
|Transmission Range:||350 - 8000nm|
|Evaporation Source:||Tantalum or graphite liner with electron-beam evaporation. 0.5nm/sec is a typical deposition rate for good crystallinity at a 300oC 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.|