Carbon fiber powder is a powdery material processed from carbon fibers, which has excellent properties such as lightweight, high strength, high temperature resistance, and electrical and thermal conductivity. It is widely used in composite materials, conductive materials, friction materials, and other fields. Carbon fiber powder is a powdery material processed from carbon fibers, which has excellent properties such as lightweight, high strength, high temperature resistance, and electrical and thermal conductivity. It is widely used in composite materials, conductive materials, friction materials, and other fields

1. Basic characteristics
Ingredients: Mainly containing carbon (over 90%), made by crushing and grinding polyacrylonitrile (PAN), asphalt or adhesive based carbon fibers.

Form: Black powder, particle size usually between 1-100 microns (customizable).
Density: about 1.7-2.0 g/cm ³, much lower than metals.
Conductivity/Thermal Conductivity: Has good electrical and thermal conductivity.
Chemical stability: resistant to acid and alkali corrosion, anti-oxidation (requires protective atmosphere at high temperatures).

Product Performance of Carbon Fiber powder:

The performance of carbon fiber powder mainly depends on its raw materials (such as PAN based, asphalt based, or recycled carbon fiber), preparation process, and surface treatment method. The following are its core performance parameters and characteristics:

1. Physical properties
Density: 1.7-2.0 g/cm ³, much lower than metals (such as aluminum's 2.7 g/cm ³), suitable for lightweight applications.
Particle size distribution: usually 1-100 μ m (customizable at the nanoscale), affecting dispersibility and composite effect.
Specific surface area: 10-500 m ²/g (higher after activation treatment), related to adsorption and catalytic performance.
Color: Black powder with light absorption properties.

2. Mechanical properties
High strength: The tensile strength can reach 500~3000 MPa (depending on the raw material and fiber length).
High modulus: The elastic modulus is about 200-600 GPa, which is close to the mechanical properties of graphene.
Brittle: The powder form has no ductility and requires composite material design to avoid brittle fracture.

3. Thermal properties
High temperature resistance: It can withstand temperatures above 2000 ℃ in an inert atmosphere, and begins to oxidize at around 350-600 ℃ in an oxidizing environment (air).
Thermal conductivity: The thermal conductivity coefficient is about 5-400 W/(m · K) (asphalt based carbon fiber powder has higher thermal conductivity).
Low thermal expansion coefficient: about -1~1 × 10 ⁻⁶/K, excellent dimensional stability.

4. Electrical properties
Conductivity: The resistivity is about 10 ⁻³~10 ⁻Ω· m, close to graphite, suitable for conductive composite materials.
Electromagnetic shielding: It can absorb or reflect electromagnetic waves, with a shielding efficiency of 60-100 dB (depending on the filling amount).

5. Chemical properties
Corrosion resistance: acid, alkali, and organic solvents (excluding concentrated nitric acid/strong oxidants).
Surface activity: Inert surface, but after oxidation (such as nitric acid treatment), carboxyl/hydroxyl groups can be introduced to enhance hydrophilicity.

6. Functional characteristics
Adsorption: The high specific surface area version can adsorb gases or impurities (such as for water treatment).
Lubrication: The layered structure reduces the friction coefficient (μ ≈ 0.1~0.3) and is used as a lubricating additive.
Biocompatibility: Some medical grade carbon fiber powders can be used as human implant materials.

How is Carbon Fiber powder produced?
The production methods of carbon fiber powder mainly include physical crushing, chemical treatment, and special process methods, and the specific selection depends on the type of raw material, target particle size, and application requirements. The following is a detailed introduction to the main production methods:

1. Physical crushing method
Cutting and grinding carbon fibers through mechanical force is suitable for large-scale production with low cost, but may cause structural damage.

(1) Mechanical ball milling method
Principle: Use grinding balls in a ball mill (such as a planetary ball mill) to impact and friction crush carbon fibers.

characteristic:
It can produce powders ranging from 1 to 50 μ m.
Easy to introduce impurities (grinding ball wear), requiring subsequent purification.
Long term grinding may cause damage to the microcrystalline structure of graphite.

(2) Jet Milling method
Principle: High pressure airflow drives carbon fiber particles to collide and crush at high speed.

characteristic:
More uniform particle size (5-100 μ m), no pollution.
High energy consumption, suitable for high-purity requirements.

(3) Freeze crushing method
Principle: Crush carbon fibers after embrittlement at low temperature of liquid nitrogen (-196 ℃).

characteristic:
Reduce the impact of fiber toughness and avoid thermal damage.
Suitable for preparing nanoscale carbon fiber powder (requiring subsequent grading).

2. Chemical treatment method
Decomposing or modifying carbon fibers through chemical means is suitable for preparing ultrafine or functionalized powders.

(1) Liquid-phase oxidation method
Process: Treat carbon fiber with oxidants such as concentrated nitric acid and sulfuric acid to destroy its surface structure, and then disperse it into powder by ultrasonic treatment.

characteristic:
Nano scale dispersed powders (100 nm~1 μ m) can be obtained.
The increase of surface oxygen-containing functional groups (- COOH, - OH) enhances hydrophilicity.

(2) Gas-phase oxidation method
Process: Air or CO ₂ is introduced at high temperatures (400~600 ℃) to oxidize and peel off the surface of carbon fibers.

characteristic:
The product has high purity, but a wide particle size distribution.

(3) Electrochemical exfoliation method
Process: Using carbon fiber as an electrode, apply voltage in the electrolyte to cause interlayer delamination.

characteristic:
Graphene/carbon nanotube composite powder can be prepared, but the cost is high.

3. Special Process Method
(1) Chemical Vapor Deposition (CVD) Cracking Method
Process: Cracking hydrocarbon gases (such as methane) at high temperatures to directly generate nano carbon fiber powder.

characteristic:
The product has high purity and controllable particle size (50 nm~1 μ m), but the equipment is complex.

(2) Preparation of regenerated carbon fiber powder
Process: Recycling waste carbon fiber composite materials, removing resin through pyrolysis (500-800 ℃), and then crushing.

characteristic:
Low cost, but slightly inferior in performance to native carbon fiber powder.

4. Post processing technology
Surface modification:
Metal plating (such as nickel plating, silver plating): enhances conductivity (used for electromagnetic shielding).
Silane coupling agent treatment: improves the interfacial bonding strength with polymer materials.
Classification screening: Obtain the target particle size through vibrating screen or airflow classification.

Carbon Fiber powder

Technical Parameter of Carbon Fiber powder:

Product Name	Tensile strength	Density	Particle Size	Resistivity	Linear expansion coefficient	Purity
Carbon Fiber powder	3500Mpa	1.75g/cm3	1500mesh	1.5*10^-3 Ω /cm3	0.1*10^-6 1C	99.9%

Applications of Carbon Fiber powder:
It can be compounded with materials such as resin, plastic, metal, rubber, etc. to increase the strength and wear resistance of the material. It has been widely used as a conductive additive for positive and negative electrode materials of nickel hydrogen and nickel cadmium batteries, electronic chips, conductive plates, conductive flooring, electronic machinery, anti-static industries (coatings, floors, paints, inks), anti-static filter cartridges, national defense and military industries, building insulation, chemical food coarse filtration, motorcycle mufflers, air filtration in paint drying rooms, polytetrafluoroethylene and other fields.

Packing & Shipping of Carbon Fiber powder :

We have many different kinds of packing depending on the quantity of Carbon Fiber powder.

Carbon Fiber powder packing: vacuum packing, 100g, 500g, or 1kg/bag, 25kg/barrel, or as you request.

Carbon Fiber powder shipping: could be shipped out by sea, by air, or by express as soon as possible once payment is received.

Packing & Shipping

Hexagonal Carbon Fiber powder supplier

Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) is a trusted global chemical material supplier & manufacturer with over 12 years of experience in providing super high-quality chemicals and Nanomaterials, including boride powder, nitride powder, graphite powder, sulfide powder, 3D printing powder, etc.

If you are looking for high-quality Carbon Fiber powder powder, please feel free to contact us and send an inquiry.

FAQs of Carbon Fiber powder

Q: What is carbon fiber powder used for?
A: Milled carbon fibre is a black filler powder made from finely ground carbon fibres. It can be added to casting resins, tooling resins, thermoplastics, paints, adhesives and coatings to improve tensile strength, dimensional stability and electrical conductivity.

Q: Is carbon fiber safe for the body?
A: However, we do know that inhaling carbon fibre dust is harmful – especially when you work with it regularly. Just because it might not be as bad as asbestos doesn't mean that it's safe. The known potential health risks (even without asbestos style issues) are already severe enough to warrant protection.

Q: Why is carbon fiber so expensive?
A: Because carbon fibre is relatively new to the market, research is ongoing to cut the costs of its production – unlike many metals and plastics, which utilise a production refined over decades and even centuries. The manufacturing process is lengthy and complex, requiring skilled engineers to complete.

Carbon fiber powder Properties
Other Names	Carbon fiber powder
CAS No.	308063-67-4
Compound Formula	NA
Molecular Weight	NA
Appearance	NA
Melting Point	N/A
Boiling Point	N/A
Density	N/A
Solubility in H2O	N/A
Electrical Resistivity	N/A
Poisson's Ratio	N/A




Carbon fiber powder Health & Safety Information
Signal Word	Warning
Hazard Statements	H319-H335
Hazard Codes	Xi
Risk Codes	36/37
Safety Statements	26-36
RTECS Number	ED7800000
Transport Information	N/A
WGK Germany	3

Carbon Fiber powder CAS 308063-67-4

Carbon fiber powder Properties

Carbon fiber powder Health & Safety Information