Graphite Board
(Rayon Sliced Foam)


The graphite rigid boards are made of Rayon Sliced foam and are used as insulation for vacuum or protective atmosphere process furnaces. The boards are easily cut or machined to custom sizes and can be used in both square and round hot zones.

Optional foil lined boards increase radiant heat retention and minimize issues with furnace contaminant containment.

Boards must be shipped freight to ensure safe delivery. Please contact us directly for a custom shipping quote or place your order and a CeraMaterials’ representative will contact you to confirm shipping cost before processing your order.

SKU: N/A Categories: ,


Temperature Rating: 2000℃

Grade: Graphite Insulating Board

Product Documentation


  • The boards can be made in complex shapes and made to print in large sizes. Please contact us for a custom quote.
  • Surfaces and edges can be sealed using our GraphiSeal to reduce porosity and improve oxidation resistance.
  • Boards can have foil added to the surface(s) or layered internally to increase radiant heat retention significantly while reducing issues with furnace contaminant containment.
  • Added foil aids in decreasing pump down times and increasing the longevity of the insulation.
  • Similarly, CFC covering on the boards provide durability, impact and wear resistance.


  • Vacuum Furnaces
  • Powdered Metal Sintering
  • Annealing & Hot Pressing
  • Silicon / GaAs Crystal Growing Furnaces
  • Sputtering Targets
  • Fiber Optics Production.
  • CVD, CVI, and CVR Furnaces
  • Graphite Purification Furnaces
  • Carbon Fiber Heat Treating Furnaces


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