From Brake Systems to Diamond Tools — Where Performance Matters
We're open to serve any industry needing electrolytic copper powder. Our technical team can support applications across automotive, aerospace, electronics, construction, chemical processing, and emerging technologies.
Friction materials convert kinetic energy to thermal energy through controlled friction. Copper powder plays multiple critical roles in both organic (resin-bonded) and metallic (sintered) friction materials.
| Application | Recommended Grades | Reason |
|---|---|---|
| Automotive brake pads | A123, A128, A135 | Good balance of properties |
| Heavy-duty truck pads | A135, A200 | Higher density, better flow |
| Railway brake pads (PM) | A200, A210 | Maximum density, flowability |
| Clutch plates | A123, A128 | Good compressibility |
| High-performance racing | A118, A123 | Maximum surface area for heat |
Typical Formulation: Automotive brake pads: 5–15% copper, 15–25% phenolic resin binder, friction modifiers. Hot pressing at 150–180°C, 20–35 MPa.
Powder metallurgy manufactures precision parts by compacting metal powders and sintering them. Copper powder serves both as primary material (bronze parts) and as alloying element (iron-copper parts).
| Application | Recommended Grades | Reason |
|---|---|---|
| Bronze bearings | A128, A135, A200 | Good mixing, sintering |
| Iron-copper parts | A135, A200 | Free-flowing for automation |
| Electrical contacts | A118, A123 | High purity, fine particle |
| Filters | A128, A135 | Controlled particle size |
| High-volume production | A200, A210 | Maximum flowability |
Sintering Conditions: Copper-rich alloys: 850–950°C | Copper-iron: 1100–1150°C | Bronze (Cu-Sn): 800–850°C. Reducing atmosphere essential (H₂ or N₂-H₂ blend).
Diamond tools use industrial diamonds held in a metal matrix (bond). Copper is a key matrix component due to thermal conductivity, toughness, and appropriate sintering characteristics.
| Diamond Grit Size | Recommended Grade | Reason |
|---|---|---|
| 400–800 mesh (fine) | A118, A123 | Fine matrix matches diamond size |
| 60–200 mesh (medium) | A128, A135 | General-purpose applications |
| 20–50 mesh (coarse) | A135, A200 | Coarse diamonds for construction |
| Application | Grades |
|---|---|
| Stone cutting (marble, granite) | A128, A135 |
| Concrete cutting | A135, A200 |
| Precision tools (glass, ceramics) | A118, A123 |
| High-volume production | A200 |
Hot Pressing Parameters: Temperature: 700–900°C | Pressure: 25–35 MPa | Time: 2–5 min | Atmosphere: Vacuum or N₂/Ar protective gas.
Copper powder is used in brazing alloys, welding consumables, and thermal joining applications, particularly in HVAC, refrigeration, and plumbing systems.
| Application | Grades | Reason |
|---|---|---|
| Brazing pastes | A128, A135 | Good mixing, flow |
| Self-fluxing alloys | A135, A200 | Uniform particle size |
| Welding rod cores | A128, A200 | Processing ease |
| Thermal spray | A200, A210 | Spheroidization behavior |
Brazing Paste Formulation: Copper powder: 80–90% | Phosphorus compounds: 5–10% | Binder/carrier: 5–10%. Application by brush, syringe, or screen printing. Heat to 700–800°C.
Copper powder is used in conductive inks, pastes, adhesives, and sintered electrical components where high electrical conductivity is essential.
| Application | Grades | Reason |
|---|---|---|
| Conductive inks | A118, A123 | Maximum surface area, fine particles |
| Printed electronics | A118, A123 | Smooth printing, good sintering |
| Die attach | A123, A128 | Balance of properties |
| EMI shielding | A128, A135 | Cost-effective |
| Sintered contacts | A123, A128 | High purity, good conductivity |
Conductive Ink Formulation: Copper powder (A118/A123): 75–85% | Organic binder: 5–10% | Solvent: 10–15% | Additives: 1–5%. Sintering at 250–400°C in reducing atmosphere.
Copper powder serves as catalyst, reagent, or reducing agent in various chemical processes and research applications, where high surface area and purity are critical.
| Application | Grades | Reason |
|---|---|---|
| Catalysis | A118, A123 | Maximum surface area |
| Organic synthesis | A118, A123 | High purity, fine particles |
| Research | A118, A123, A128 | Flexibility in particle size |
| Large-scale processes | A128, A135 | Cost-effective, good properties |
Research Note: Our A118 and A123 grades are particularly suited for research applications where maximum surface area and highest purity are required for reproducible results.
Carbon brushes are sliding electrical contacts used in motors, generators, alternators, and slip ring assemblies. Electrolytic copper powder is a critical ingredient in carbon brush formulations, significantly improving electrical conductivity, thermal management, and service life.
| Brush Type | Cu Content | Recommended Grade | Reason |
|---|---|---|---|
| Electrographitic | 10–25% | A118, A123 | Fine particles, high surface area for bonding with graphite |
| Metal-graphite | 25–60% | A123, A128 | Good compressibility, strong green compact |
| Copper-graphite | 40–80% | A128, A135 | Balanced density and flowability for pressing |
| High-current slip rings | 60–80% | A135, A200 | Free-flowing for automated production |
Typical Processing: Mix copper powder with graphite/carbon black → Cold press at 100–300 MPa → Sinter at 700–900°C in reducing atmosphere → Machine to final dimensions. Copper content directly controls resistivity (typically 0.5–50 μΩ·m for metal-graphite grades).
Key Data: Metal-graphite brushes with 40–60% Cu achieve contact resistance of 0.1–1.0 mΩ/cm² and current density up to 15–20 A/cm² — significantly better than pure carbon grades.
Brake system manufacturers, clutch manufacturers, PM part producers, Tier 1 & 2 suppliers
Railway brake system suppliers, metro/subway equipment, heavy vehicle brake producers
Bearing manufacturers, structural PM component producers, automotive PM parts suppliers
Stone cutting tool makers, construction tool producers, drilling tool manufacturers
Brazing alloy producers, welding wire manufacturers, HVAC/refrigeration suppliers
Printed circuit board producers, conductive ink manufacturers, flexible electronics companies
Chemical synthesis companies, catalyst manufacturers, research institutions, fine chemical producers
Universities, research labs, materials science departments, government research facilities
Carbon brush manufacturers, motor & generator OEMs, traction motor suppliers, power tool manufacturers
Our technical team can help you select the right grade and provide application-specific guidance for your process.
