High Quality Graphite Soft Felt and Hard Felt for High Temperature Applications

• Customization: Available
• Classification: Graphite Felt
• Feature: Chemical Corrosion Resistance, Corrosion Resistance, Good Abrasion Resistance, Good Insulation Performance, High Mechanical Strength, Thermal Shock Resistance
• Model NO.: CZKBSMZ003
• Usage: High-Temperature Furnaces
• Bulk Density (G/Cm³ ): 0.1-0.23G/Cm3
• Materials: Carbon or Graphite Felt
• Size and Shape: Customer Request
• Color: Black Grey
• Advantages: Corrosion Resistance
• Place of Origin: Hebei, China
• Product Name: Graphite Felt
• Advantaes: High Temperature Resistance/ Acid Resistance/ Alka
• Application: High Temperature Furnace
• Composition: High Pure
• MOQ: 1 PCS
• Customized Service: Support
• Lead Time: to Be Negotiated
• Transport Package: Plywood Box
• Specification: customized
• Trademark: KB
• Origin: China
• Production Capacity: 800000 Pieces/Month

Product Description

Graphite felt, also known as graphite fiber felt, is mainly used as a thermal insulation and refractory material for various industrial furnaces including single crystal furnaces, carbonized furnaces, quartz furnaces, vacuum furnaces, thermal balance reaction furnaces, heat treatment furnaces, sintering furnaces, welding furnaces, and high-pressure furnaces for metallurgy, machinery, and chemical engineering industries. It is also used as a filter material for high-purity corrosive chemical reagents.

Graphite felt has a carbon content of over 99%, which is higher than carbon felt. Under non-oxidizing atmosphere conditions, its working temperature can be over 2000 °C. It works with graphite composite boards and graphite special-shaped parts to form the insulation layer of industrial furnaces.

Graphite felt is divided into soft graphite felt and rigid graphite felt. In addition, carbon felt before high-temperature graphitization is also an excellent high-temperature thermal insulation material and has good adsorption properties for inorganic gases.
Soft Graphite Felt - Flexible Refractory Insulating Material

• High purity, high thermal stability.
• Low thermal conductivity coefficient, no static electricity.
• Easy cutting and machiningSoft graphite felt is a flexible insulating material for high temperature applications in inert or vacuum atmosphere and is entirely made of carbon fibers. When used as an insulation material for high-temperature industrial furnaces, it can be bound and stitched with carbon ropes woven through special process. Due to its controlled internal structure and electrical conductivity, soft felts can also be used for energy storage like redox flow cells. Soft graphite felts are divided into PAN-based soft graphite felts, rayon based soft graphite felts, and soft felts for battery.

The base material for the production of carbon and graphite soft felt is felt made of needled cellulose fibers. They are processed into carbon soft felts by thermal treatment at temperature 800-1000°C. If these felts are treated at higher temperatures >2000°C, they become graphite soft felt.
 

Rigid Graphite Felt - Thermal Insulation Materials for Industrial Furnaces
Typical properties of rigid graphite felt:

• High temperature stability.
• Low thermal conductivity
• good thermal insulation effect.
• thermal shock resistance.
• Erosion resistance

Rigid felt is a rigid insulation material with low thermal conductivity based on carbon fibers. A carbon based bonding material locks the fibers in a rigid structure, that can be offered in any shape (for example, plates, cylinders, barrels, disks).

Rigid felt is produced by mixing and pressing of fiber material and binder, followed by high temperature treatment at temperature up to 2800 °C. In the final production step the rigid felt is machined to the desired dimensions.

Surface coating can be: CFC, graphite foil or carbon cloth. 

Rigid graphite felt is generally divided into pitch-based rigid graphite felt, PAN-based rigid graphite felt and rayon-based rigid graphite felt. Comparing with rayon-based rigid graphite felt, PAN-based rigid graphite felt has bigger strength, better oxidation resistance, higher density, but weaker flexibility, better insulation properties.
Technical Data of Graphite Soft Felt: 
 

Material		PAN-CF	Rayon Graphite Felt
Volume  density ( g/cm^3)		0.1-0.16	0.10-0.12
Carbon Content  (%)		≥99	≥99
Thermal conductivity(800ºC)W/mk		0.13-0.31	0.09-0.21
Ash  ( %)		≤0.05	≤0.02
Processing temperature (ºC)		≥2200	≥2200
Operating Condition	in the air(ºC)	≤400
	in the vacuum (ºC)	≥2200
	in the inert atmosphere (ºC)	≥3400

Technical Data of Graphite Rigid Felt: 

Material		PAN-CF Graphite Rigid Felt	PAN-YZ Interger  Graphite Rigid Felt	Rayon Graphite Rigid Felt
Volume  density ( g/cm^3)		0.16-0.35 can be adjusted	0.14-0.21 can be adjusted	0.18-0.23 can be adjusted
Thermal conductivity(800ºC)W/mk		0.2-0.3	0.12-0.25	0.12-0.25
Carbon Content  ( %)		≥99	≥99	≥99
Processing temperature (ºC)		≥2200	≥2200	≥2200
Operating Condition	in the air(ºC)	≤400
	in the vacuum (ºC)	≥2200
	in the inert atmosphere (ºC)	≥3400

Technical Data of Graphite Material: 
Isostatic Graphite

Property	KBD-5	KBD-6	KBD-7	KBD-7B	KBD-8	Unit
Apparent Density	1.85	1.90	1.82	1.82	1.90	g/cm^3
Max Grain Size	13-15	8-10	8-10	13-15	8-10	µm
Ash value	≤500	≤500	≤500	≤500	≤500	ppm
Specific Electrical Resistivity	8-10	8-9	11-13	11-13	11-13	μΩm
Flexural Strength	46	55	51	59	60	Mpa
Compressive Strength	85	95	115	121	135	Mpa
Shore Hardness	48	53	65	70	70	HSD
Thermal Expansion (room temperature to 600ºC)	4.75	4.8	5.8	5.8	5.85	10-6/ºC

Molded Graphite 

Property	KBG-4	KBG-5	Unit
Apparent Density	≥1.80	≥1.85	g/cm3
Ash value	≤500	≤500	ppm
Shore Hardness	≥40	≥45	HSD
Specific Electrical Resistivity	≤12	≤12	μΩm
Flexural Strength	38	41	Mpa
Compressive Strength	81	87	Mpa
Max Grain Size	25	25	μm

Vibration Graphite

Property	TSK	GSK	Unit
Apparent Density	≥1.70	≥1.72	g/cm3
Max Grain Size	≤2	≤0.8	mm
Specific Electrical Resistivity	8-10	≤8.5	μΩm
Flexural Strength	≥12.5	≥15	Mpa
Compressive Strength	≥28	≥35	Mpa
Porosity	≤24	≤20	%
Ash value	≤0.3	≤0.3	%

Advanced Production Equipments 

Strict Quality Control Ensures High Quality Products

  

Safe Packing 


Question and Answer:

Q:Are you a manufacturer or trading company?
A:We are a manufacture for graphite material and graphite machined products.

Q:How can you gurantee the quality?
A:We have the most advanced equipments in our Lab and professional quality control team.We can gurantee each batch of the product with the stable quality.

Q:Can you offer samples?
A: Yes, we offer samples to test

Q: Delivery time?
A:Around 10 days.

Q: Shipping pot
A: Tianjin or main port in China

Q:Payment terms
A:T/T,LC at sight