Rigid Boards



Graphite Board with Foil.

What is Carbon & Graphite Insulating Rigid Boards?

Rigid boards are made of rigidized Pan long fiber felt or 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. Our office recommends rigidized felt for heat treating vacuum furnaces and hot pressing due to the materials courses fiber, oxidation resistance, lower price point, and the same great performance.

Additionally, our office offers foil layered graphite insulation boards that are manufactured with alternating layers of rigidized felt and graphite foil with foil on both sides of the board. This creates a very stiff and dimensionally stable strong material that provides excellent erosion resistance, thermal uniformity, and great machining capabilities. These boards can be produced up to 10″ thick x 60″ x 60″ and fabricated into large cylinders. Manufactured to order but our office does stock 1″ x 40″ x 60″ boards.

Benefits

  • 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.
Custom Size Graphite Rigid Boards

Applications

  • 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

Useful Charts.

Rigid Board Properties
PropertyMeasured Value
Bulk Density0.35
Carbon Content≥ 95
Thermal Conductivity0.15 - 0.25
Specific Resistance0.18 - 0.22
Strength of Bending1.1
Ash Content≤ 0.6
Processing Temperature1200-2000
Environment To Use1250-3000
SizeMax 1.5m (60" x 60")
Standard Size40" x 60"
ThicknessUp to 20"
Rigid Board Info & Pricing
Rigid
Boards
Process Temp.
(℃)
Size
(in)
Density
(g/cm³ | lb/ft³)
Weight per Board
(lbs)
Board
Pricing
Foil Coating
Pricing
Carbon
(Rigidized PAN Felt)
12001" x 40" x 60"0.2515.6122$750.00$800.00
(2 Sides)
12001.5" 40" x 60"0.2515.6132$1000.00$1050.00
(2 Sides)
12002" x 40" x 60"0.2515.6143$1,400.00$1,450.00
(2 Sides)
12004" x 40" x 60"0.2515.6186$2,600.00$2,650.00
(2 Sides)
Graphite
(Sliced Foam)
20001" x 24" x 52"0.2414.9811$450.00$500.00
20001" x 40" x 60"0.2414.9821$900.00$950.00
20001.5" x 24" x 52"0.2414.9816$630.00$680.00
20001.5" 40" x 60"0.2414.9831$1,200.00$1,250.00
20002" x 24" x 52"0.2414.9822$840.00$890.00
20002" x 40" x 60"0.2414.9841$1,600.00$1,650.00
20004" x 24" x 52"0.2414.9843$1,670.00$1,720.00
20004" x 40" x 60"0.2414.9883$3,200.00$3,250.00

Ready to order?

  • Carbon boards are stocked in 60 inch x 40 inch x all thicknesses above with foil on 2 sides for same day shipping.
  • Graphite boards 60 x 40 inch & 52 x 24 with foil on 1 side ship within 1 week.
  • The Boards can be covered on one or both surfaces with the following
    • Graphite foil (0.015″ thick) = $50 per side.
    • Carbon-fiber-composite (0.030″ thick) = ~$250-$450 per side.
  • Board thickness capability up to 20 inches thick.
  • Custom high temperature heat treatment up to 2600°C & halogen purification available.

If you have any additional questions or need a custom quote, our team is always available to help.