"TUNGST.BOAT 4X1/2""DIMPLE P/5"

Alumina Coated Evaporation Source

Replaces alumina crucibles for some specific applications. Good heat transfer yet has alumina inertness. Evaporant does not wet the alumina: no resistant change of the boat when evaporant melts. Due to the non-wetting characteristic, the evaporant forms a sphere when melted resulting in a point source.
4" L x 1/2" W (101 x 12mm). Trough is a dimple: 1/2" diameter and 1/8" deep (12 x 3mm).
Alumina coated thickness: 0.005" (0.127mm)
Tungsten thickness: 0.010" (0.25mm)
Settings: 1.29V/190A/245W for 1200°C