Common Specifications of Carbon Fiber Powder
A brief introduction to the common specifications of carbon fiber powder.
Common Specifications of Carbon Fiber Powder
Carbon fiber powder is a powdery material produced by pulverizing carbon fiber filaments; it serves as a functional filler in applications such as conductive plastics, anti-static coatings, and thermally conductive composite materials. Its key parameters include fiber length, diameter, and carbon content.
Fiber Length
Fiber length influences both the reinforcing effect and dispersibility.
Category | Range | Characteristics | Applications |
Chopped Fiber Grade | 80-200 μm | Retains Reinforcement Effect | Engineering Plastics Modification |
Standard Powder Grade | 30-80 μm | Balanced Dispersion and Reinforcement | General-purpose Conductive Fillers, Coatings |
Fine Powder Grade | 5-30 μm | High Dispersibility | Films, High-Performance Coatings |
Ultrafine Powder Grade | <5 μm | Nearly Spherical | Electromagnetic Shielding, Specialty Coatings |
Common Industrial Applications: 100–150 μm for conductive plastics; 30–50 μm for coatings.
Fiber Diameter
The diameter depends on the specifications of the precursor filament, influencing both the specific surface area and wettability.
Category | Range | Corresponding Precursor Fiber | Characteristics |
Standard Diameter | 7-8 μm | T300、T700 | Most common; high cost-effectiveness |
Fine Diameter | 5-6 μm | T800、T1000 | High specific surface area; high reinforcement efficiency |
Coarse Diameter | 8-10 μm | Large-tow carbon fiber | Lower cost |
Common in Industry: 7 ± 1 μm is the mainstream standard.
Carbon Content
Carbon content determines electrical conductivity, thermal stability, and chemical stability.
Category | Range | Heat Treatment | Characteristics | Applications |
Standard Grade | 90%–95% | Carbonization | Low cost; moderate conductivity | General-purpose anti-static applications |
High-Carbon Grade | 95%-98% | High-temperature carbonization | Good conductivity; enhanced thermal stability | Thermally conductive materials; high-performance plastics |
Graphitization Grade | ≥99% | Graphitization | Excellent conductivity; high-temperature resistance | Conductive additives for lithium-ion batteries; high-end thermal management |
Typical Application Parameter Combinations
Application | Length | Diameter | Carbon Content |
Conductive Plastics (Injection Molding) | 100-150 μm | 7-8 μm | ≥95% |
Anti-static Coatings | 30-50 μm | 7-8 μm | ≥93% |
Thermally Conductive Gaskets | 50-100 μm | 7-8 μm | ≥98% |
Lithium Battery Conductive Additives | 5-15 μm | 5-7 μm | ≥99% |
Rubber Reinforcement | 80-150 μm | 7-10 μm | ≥93% |
Selection Guidelines
By Processing Method: Injection molding: 100-150 μm; Coating: 30-50 μm
By Conductivity Requirements: General antistatic: ≥93%; High conductivity: ≥99%
By Thermal Conductivity Requirements: Prioritize ≥98%, length 50-100 μm
By Cost: General grade: ≥93%; High-end custom grade: ≥99%
Summary
The performance of carbon fiber powder is determined by its length, diameter, and carbon content. Selection requires finding a balance among conductivity, thermal conductivity, reinforcement requirements, and processing technology. We are a Chinese carbon fiber material manufacturer. For more information, please contact us at annayu@169chem.ne or WhatsApp +8618909016373.