Rigid Graphite Fiber Board

The graphite fiber board is a very good thermal insulator and is used in the majority of vacuum furnace linings. To cut down particle emissions from the material we can offer it supplied foiled one side or both sides as well as coated.

Graphite Fiber board is available in standard thickness – 1”, 1.5” 2” and 2.5” at standard lengths of 42” and 52”.

Graphite Rigid Insulation Technical Data

J.C.Cole & Associates, Inc provides its customer with a graphite fiber insulating material, using lightweight carbon bonded fibers to provide low thermal conductivity and vapor pressure with excellent insulating characteristics to reduce heat loss. It can withstand furnace temperatures up to 5400°F (3000°C) and virtually eliminates voids or hotspots found with other materials. It is easy to handle, easy to install, machines freely and is able to hold fine detail.

Typical Applications

• Vacuum furnace insulation
• Inert gas furnace insulation
• Inert gas atmosphere process equipment insulation

Sizes
Board stock 1” x 24’ x 42” – 1” x 24” x 52” – 1” x 25” x 60” – 1” x 30” x 50” and all thicknesses surrounding these sizes. We do specialty cuts also, please call with requests. Additional sizes and shapes available upon request.

Multi-piece board stock and large diameter barrel stave cylinders can be fabricated by machined “shiplap” joint techniques. When bonded with graphite cement and cured the joints can be stronger than the insulation and will not lose joint integrity in normal usage.

Carbon & Graphite Felt

J.C. Cole and Associates, Inc. offers Carbon and Graphite Felts in standard widths and standard thicknesses to meet a wide range of applications. These products are easy to cut and install. The felts can be sewn in place using carbon cordage. Felt material is generally used as thermal insulation in inert and vacuum furnaces. For special applications, this felt is available with graphite coatings which will reduce the permeability of the felt and improve its resistance to erosion.

This felt can be surface coated with graphite foil bonded or combined with carbon/carbon face plates to provide an insulation system that is utilized with operations such as rapid gas quenching, resulting in longer useful life of the insulation system.

Carbon Cordage

J.C. Cole and Associates, Inc can provide a variety of braided carbon cordage for use in sewing carbon or graphite felts in vacuum or inert atmosphere furnaces. Typically, the cords are comprised of 12k, 18k and 24k individual filaments in a braided structure, sold in 150m/spool. Exporting is available on this product.
Please call 603-234-6374, or contact us for pricing and availibility.

Available in 12K, 18k and 24k – 150 mm spools.

Die Cuts

Cost saving feature for the end user. We provide specialty die cut Carbon and Graphite felt using 1/4″, 1/2″ and 1″ carbon and graphite felts. Send your specifications for a delivery and price quote.

Carbon and graphite felts are designed for use as high temperature insulation in resistance or induction heated vacuum furnaces and inert gas furnaces. Made of carbon or graphite fibers, these materials have low thermal conductivity and vapor pressure. They are used
in oxidizing atmospheres up to 350°C (662°F) and in protective atmosphere or vacuum up to 3000°C (5432°F).

Carbon and graphite felts are considerably less expensive and more effective than metallic radiation shields and may be used to replace them, with power savings of up to 75%. The low specific heat and low density permit rapid heating and cooling of furnaces. Although carbon and graphite felts are slight electrical conductors, in a inductive field under 12 kilohertz, they do not couple and heat up. At higher frequencies, the tendency to couple can be reached by placing longitudal slits in the felt. Carbon and graphite felts are used as backing strips for soldering and welding. Carbon and graphite felts are easy to cut using scissors or knife and have small bending radii. The felts have high purity levels with low sulfur content and have virtually no outgassing and are not wetted by most molten metals.

They are available in a variety of thicknesses and widths. Carbon Felt is premium quality carbon felt exhibiting greatly reduced gas evolution and higher oxidation resistance than standard carbon grades. It is not equal to graphite in these respects, but it is a lower cost solution for applications of lower temperatures where chemical purity is not as critical. Carbon Felt is processed to a minimum temperature of 1400°C. Graphite Felt is preferred for vacuum service because of its negligible gas evolution when heated to 3,000°C. It also exhibits the greatest oxidation resistance in the presence of trace oxidizing elements in the atmosphere. Shrinkage and water absorption are negligible. Graphite Felt has been processed to a minimum temperature of 2,500°C.

Type G-027 is a water based graphite paint specifically formulated to provide a superior lubricating and release film for high temperature applications. This paint provides maximum protection against galling, soldering and seizing.

Type G-027 graphite paint offers excellent coverage and superior adhesion and abrasion resistance.

We offer this in quarts/gallons and 5 gallon containers.

Mica Electrical Insulation – Mica flake impregnated to make an electrical insulation for use with induction heat treating or any application requirement to isolate electrical current.

• Thermal-Mica can withstand temperature in excess of 1000°C/1830°F (Phlogopite), it is flame-retardant, non-flammable, does not give off fumes, and conducts very little heat, especially perpendicular to its strata.
• Electrical-Natural mica has a dielectric strength greater than 25kV/mm (625V/mil), has good resistance to arcing and electrical erosion, and is permeable to microwaves.
• Chemical-Mica is tolerant of water and most chemical agents, such as solvents, acids, bases and mineral oils.