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Electrolytic copper powder · Dendritic high-purity copper powder · Cu
Electrolytic production · High specific surface area · Specialized for powder metallurgy and oil-impregnated bearings -300 mesh / -500 mesh / -600 mesh
Process Advantages
High purity
High copper content, stringent control of total impurities, and low levels of critical impurities ensure stable electrical conductivity and catalytic performance.
Dendritic morphology · High specific surface area
The unique dendritic structure produced by the electrolytic method exhibits a large specific surface area, high green‑body strength, and excellent sintering activity.
Low oxygen content
Oxygen content is well controlled, with excellent oxidation resistance; it resists oxidation during long-term storage, ensuring stable sintering and electrical conductivity.
Particle size is flexibly adjustable.
Standard particle sizes: -300 mesh, -500 mesh, and -600 mesh; particle size range is adjustable, with support for custom grading and narrow distribution ranges.
Product Real-World Photos & Microscopic Morphology
SEM of dendritic electrolytic copper powder
Typical dendritic morphology, large specific surface area, and strong mechanical interlocking.
High-magnification dendritic structure
Fine dendrites are abundant, sintering activity is high, and green compact strength is excellent.
Real-life photos of the powder
Rose-red powder, vacuum-packed, with batch traceability.
Electrolytic copper powder: dendritic high-purity copper powder
Electrolytic copper powder is produced via an electrolytic refining process, in which current density and electrolyte composition are carefully controlled to yield a distinctive dendritic morphology. This morphology exhibits an exceptionally high specific surface area, strong mechanical interlocking between particles, and results in green compacts with high strength after pressing. Moreover, it demonstrates excellent sintering activity, enabling robust densification even at low temperatures. TIJO’s electrolytic copper powder features tightly controlled copper content, low oxygen levels, and trace impurities such as Fe, Pb, Zn, As, and Sb—all maintained at very low concentrations in compliance with GB/T 5246. Standard particle sizes include −300 mesh (≤48 μm), −500 mesh (≤25 μm), and −600 mesh (≤23 μm), making it suitable for applications such as powder‑metallurgy oil‑impregnated bearings, copper‑based friction materials, diamond tools, carbon brushes, electrical contacts, and chemical catalysts. The product offers high batch-to-batch consistency and supports customized particle size specifications.
Chemical Composition (wt%, GB/T 5246 Standard)
| element | Cu (%) | Impurity content (ppm, not exceeding) |
|---|---|---|
| Indicator | ≥99.8 | — |
| Fe | — | 100 |
| Pb | — | 400 |
| Zn | — | 40 |
| As | — | 40 |
| Sb | — | 50 |
| Bi | — | 20 |
| Ni | — | 30 |
| Sn | — | 40 |
| S | — | 40 |
| Cl⁻ | — | 40 |
| H₂O | — | 400 |
| Nitrate-insoluble matter | — | 500 |
| Sum | — | 2000 |
* Oxygen content is well controlled and can be further reduced through reduction treatment. All impurities comply with the GB/T 5246-2016 standard for electrolytic copper powder.
Key Particle Size Specifications & Physical Properties
| Particle size specification | Corresponding mesh count | D50 range (μm) | Loose packing density (g/cm³) | Tap density (g/cm³) | Flowability (s/50g) | Typical Applications |
|---|---|---|---|---|---|---|
| -300 mesh | ≤48μm | 20-45 | 1.8-2.5 | 2.5-3.5 | ≤35 | Oil-impregnated bearings, powder metallurgy structural components, diamond tools |
| -500 mesh | ≤25μm | 10-20 | 1.5-2.2 | 2.2-3.0 | ≤38 | Fine powder metallurgy, carbon brushes, conductive materials, catalysts |
| -600 mesh | ≤23μm | 8-15 | 1.4-2.0 | 2.0-2.8 | ≤40 | Ultrafine oil-impregnated bearings, friction materials, and high‑specific‑surface‑area catalysts |
* The branched morphology results in a lower tapped density but higher green strength. Customization is available to meet customer requirements.
| Parameter item | Numerical value | Note |
|---|---|---|
| Density (theoretical) | 8.92 g/cm³ | The density of the sintered part can reach 8.5–8.8 g/cm³. |
| Melting point | 1083℃ | — |
| Boiling point | 2595℃ | — |
| Electrical conductivity (annealed state) | ≈58 MS/m (100% IACS) | Excellent electrical conductivity |
| Thermal conductivity (20°C) | ≈401 W/(m·K) | Excellent thermal conductivity |
Dendritic electrolytic copper powder vs. atomized spherical copper powder
| Performance Dimension | Dendritic Electrolytic Copper Powder (TIJO) | Atomized spherical copper powder |
|---|---|---|
| Appearance | Branch-like/irregular, with a large specific surface area | Spherical, with a smooth surface |
| Loose packing density | Lower (1.5–2.5 g/cm³) | High (3.0–4.5 g/cm³) |
| Green compact strength | High (mechanical interlock) | Low |
| Sintering activity | High | Medium |
| Forming pressure | Low, easy to suppress | Requires higher pressure |
| Recommended Apps | Powder metallurgy, oil-impregnated bearings, friction materials | Conductive pastes, 3D printing, thermal spraying |
Dendritic electrolytic copper powder offers unique advantages in compaction and sintering densification, making it the preferred choice of copper powder for conventional powder metallurgy processes.
Process Recommendations and Parameters
| Craftsmanship | Recommended particle size | Key parameters | Typical Product Performance |
|---|---|---|---|
| Oil-impregnated bearing, pressed and sintered | -300 mesh | Pressing pressure: 200–350 MPa; sintering at 800–900°C in a reducing atmosphere. | Oil content: 18–22%; crush strength: ≥200 MPa. |
| Diamond tools | -300 mesh / -500 mesh | Mixed with diamond and a binder, then hot-pressed and sintered. | Tire carcass hardness: HRB 80–100; high flexural strength. |
| Powder Metallurgy Structural Components | -300 mesh | Press at 400–600 MPa, sinter at 850–950°C. | Density ≥ 7.8 g/cm³, excellent electrical conductivity |
TIJO provides process‑technology support and sample testing, helping customers achieve stable production quickly.
Typical application areas
Powder metallurgy
Oil-impregnated bearings, copper-based friction materials, electrical contacts, carbon brushes, and powder metallurgy structural components
Diamond tools
Diamond cutter heads, grinding wheels, wire saws, and drill bit matrix materials
Chemical catalysis
Catalyst support, methanol synthesis catalyst, chemical reaction additive
Electronics industry
Conductive pastes, electromagnetic shielding materials, and conductive adhesive fillers
Automotive industry
Brake pads, clutch discs, friction-reducing materials
Thermal management
Thermal conductive filler, heat-dissipating coating
End-to-end testing capability
Each batch of electrolytic copper powder is tested for copper content, key impurities, particle size distribution, oxygen content, and tapped/loose bulk density. A Certificate of Analysis (COA) is provided, in compliance with the GB/T 5246 standard.
Packaging & Delivery
Powder packaging
Vacuum-sealed in a double-layer aluminum foil pouch (to prevent oxidation), with an outer iron or plastic drum.
Specifications: 1 kg, 5 kg, 10 kg, 25 kg, 50 kg per drum
Export packaging
Export orders are packed in wooden crates or palletized and reinforced to protect against moisture and impact.
Compatible with sea freight, air freight, and international express delivery.
Delivery time
Standard particle size in stock; ships within 2–5 days after order confirmation.
Custom particle size or special grading: 7–12 days
Batch Traceability
For each batch, a sample is retained, and the COA report is shipped with the goods.
Supports third-party testing (e.g., SGS)
Free sample
Free samples are provided for process validation.
Small-batch samples; bulk supply upon quality confirmation.
Customized Services
Custom particle size, custom oxygen content
Meets special operating conditions and equipment requirements
Shipping documents
COA, MSDS, ingredient list, packing list
Meets export customs clearance requirements and customer in-plant inspection standards.
Technical Support
Provide guidance on powder metallurgy process parameters.
Assist in resolving issues encountered during use.
Inquire Now for Free Samples
Fill out the form on the right or contact us directly; we will provide product samples, technical data sheets, and price quotes to help you quickly complete your additive manufacturing process validation.
Address: No.39, Liandong Yougu lnd. Park, Bachelor Street,Changsha City,Hunan Province, China.
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Address: No.39, Liandong Yougu lnd. Park, Bachelor Street,Changsha City,Hunan Province, China.
