Tungsten shield  is very good material for high temperature Hot-Zone construction. 

The heat shielding is make up of multiple layers of molybdenum sheet with spaces between each layer. Generally, a heat shielding often consists of 3 - 5 layers of molybdenum sheet backed by stainless steel sheet. For higher operation temperatures, the number of molybdenum layers is increased as well as the thickness of each layer.

Application:

cylindrical furnace, chamber furnace

Material:

We also supply heat shield make of TZM, MoLa and Mo1.