Overview
Atomized spherical copper powder is produced through gas or water atomization processes, where molten copper is broken into fine droplets that solidify into spherical particles. This morphology ensures superior flow characteristics compared to irregular powders, making it ideal for automated industrial processes like additive manufacturing. The powder's high electrical (5.96×10⁷ S/m) and thermal conductivity (401 W/m·K) drive its use in electronics and thermal management applications. Modern production techniques enable tight control over particle size distribution (PSD), typically ranging from 5-100μm. Aerospace-grade powders achieve purity levels exceeding 99.95% with minimal satellite particles. The spherical shape reduces internal porosity in sintered components, yielding densities over 98% of theoretical copper density.
Physical and Chemical Properties
The powder's sphericity (>0.9) and smooth surface morphology contribute to exceptional apparent density (4.5-5.5 g/cm³) and tap density (5.0-6.0 g/cm³), critical for powder bed fusion processes. Particle size distribution follows log-normal curves, with D50 values customized for specific applications – finer powders (10-25μm) for inkjet conductive inks, coarser (45-75μm) for cold spray coatings. Chemically, surface oxide layers (Cu₂O/CuO) typically measure 20-100nm thick. Advanced packaging methods using vacuum-sealed aluminized bags maintain oxygen content below 300ppm. The powder exhibits excellent sintering activity at 850-950°C in forming gas (95%N₂-5%H₂) atmospheres, with shrinkage rates carefully calibrated for net-shape manufacturing.
Main Applications
In binder jetting and selective laser melting (SLM) systems, spherical copper enables complex heat exchanger geometries with wall thicknesses below 200μm. The electronics industry utilizes it in copper-silver (Cu-Ag) composite pastes for die-attach applications, where its spherical shape prevents viscosity spikes during screen printing. Emerging applications include electromagnetic interference (EMI) shielding coatings for 5G devices, where copper's skin effect outperforms carbon-based materials at high frequencies. Thermal interface materials benefit from the powder's deformation characteristics under compression, achieving thermal resistances below 5 mm²·K/W in TIM formulations.
Safety and Storage
As a Category ST1 combustible dust (per ISO 80079-20-2), handling requires ATEX Zone 20 equipment with maximum surface temperatures below 150°C. Storage in humidity-controlled environments (<30% RH) prevents capillary bridging between particles. Nitrogen glove boxes are recommended for long-term storage of reactive grades (oxygen <100ppm). PPE should include P100 respirators and conductive footwear to prevent electrostatic discharge ignition. Spill containment follows Class D metal fire protocols – dry sand or copper-specific extinguishing powders (e.g., Met-L-X). Waste disposal must account for copper's aquatic toxicity (LC50 Daphnia magna 0.02 mg/L).
B2B Procurement Guide
Industrial buyers should specify: 1) Atomization method (gas > water for sphericity), 2) PSD span [(D90-D10)/D50] <1.5 for AM, 3) Hall flow rate (<25s/50g for critical applications), and 4) ICP-MS impurity profiles (Bi <5ppm to prevent hot cracking). Batch certification should include SEM micrographs with circularity analysis. For thermal management applications, request laser diffraction PSD data rather than sieve analysis. Consider ordering pre-alloyed powders (Cu-Cr-Zr, Cu-Ni-Si) for specialized metallurgical properties. Just-in-time delivery in 1-5kg sealed containers minimizes oxidation risks compared to bulk shipments.
Related Manufacturers
- 主营：耐磨焊条、耐磨焊丝、铬粉、纯铜粉、氧化铜粉、黄铜粉、青铜粉、白铜粉、锡粉、镍粉、钼粉、钨粉、碳化钨粉、钒粉、钴粉、氧化铬绿、碳化铬粉、铝粒、铁粉、氧化铝粉、碳化硅粉、不锈钢焊条、不锈钢焊丝、镍基合金粉
- 主营：钴粉、镍粉、铬粉、铜粉、钼粉、铅粉、铌粉、硼粉、铟粉、锡粉、钴基合金粉、不锈钢合金粉、冶金 喷涂喷焊金属粉末、铁基合金粉、镍基合金粉
- 主营：铜粉、镍粉、合金粉末、镍基合金粉末
- 主营：黑铬粉、tc4钛粉、粉碎机、纯铜粉、合金粉、目镍粉、纯锡粉、纯银粉、镀膜球、500目纯、高硅粉、钴基粉、铁锡粉、纯钨粉、镍粉球、目银粉、镍基粉、粉铬粒、锡焊粉、硅粉石、高铬粉、导电粉、氮化硅、纯铬粉、高纯铅粉
- 主营：等离子堆焊合金粉末、激光熔覆合金粉末、碳化钨合金粉、铜粉、镍基合金粉、铁基合金粉、钴基合金粉、喷涂铜焊丝、铝及铝合金焊丝、耐磨焊丝、不锈钢焊丝、金属工件涂层喷涂、硼铁合金粉、焊接车刀、铜合金焊条、铜焊丝、铝青铜合金粉、硼铁粉、球形镍粉、镍基合金粉末、氩弧焊材、超细硼粉、碳化硼粉末、不锈钢粉末、304不锈钢粉
- 主营：铜粉
- 主营：硼化铌、铜基粉、碳化钽、铜粉末、碳化钨、锰铁粉、催化剂、毛毡条、锂电池、锡铋粉、喷涂粉、硅铁块、解铌粉、铝青铜、合金粉、钼铁块、锗粉末、镍包铜、镍靶材、氧化锗、氧化锆、钴基粉、导热粉、细钒粉、纯银粉、锡半球
- 主营：高纯镍粉、导电镍基粉、钨粉、电解金属铜粉、铜粉、纯铜粉、氧化铜粉、钴粉、锡粉、铬粉、高纯铁粉、氧化铝粉、氧化铬绿、铝粒、铝颗粒、不锈钢焊条、不锈钢焊丝、耐磨焊条、耐磨焊丝、铸铁焊条、铝焊丝、钼粉、碳化钨粉、碳化硅粉、碳化铬粉
- 主营：金属铜粉厂家、氧化铜
- 主营：钨铁粉、铬铁粉、金属硅粉、雾化镍粉、铜粉、金属粉末铬粉、铁硅铝、铁硅铬、片状铁硅铝、片状铁硅铬、片状羰基铁粉、羰基铁粉、钴粉、镍基合金粉、钴基合金粉、钛铁粉、金属铬粉、钼铁粉、超细铁粉、铁粉、高碳铬铁粉、镍粉
- 主营：麦饭石粉、滑石粉、沸石粉、银铜粉、氧化钙、膨润土、白云石粉、橡胶粉、石英粉、硅微粉、碳酸钙、石墨、硅藻土、抗菌粉、氢氧化钙、消石灰、陶土、活性白土、金刚砂、木粉、磁粉、海泡石粉、二氧化硅、高岭土、负离子粉
- 主营：吡啶硫酮铜粉、全氟三丁胺、木质素、吉氏色素
- 主营：耐磨涂层、陶瓷喷涂、喷涂碳化钨、高纯铜粉、耐磨合金刀片、防腐纳米涂层
- 主营：全氟三丁胺、二苄叉山梨醇、六氟丙烯二聚体、六氟环氧丙烷二聚体、异丙醇铝、纳米勃姆石、二异戊基硫醚、隐色结晶紫、邻菲罗啉
- 主营：纳米铜粉、氧化铬绿
- 主营：架桥剂、YW100 锂萃取剂、端羧基液体丁腈橡胶、超细铜粉、10-羟基癸酸、苯乙烯磷酸、肉豆蔻酸镁、硬脂酸钴、全氟三丁胺、乙烯基磷酸二乙酯、磷酸锰铁锂、β-磷酸三钙、十一烯酸、钨酸铝、1-乙炔基环已醇、间二异丙苯、锂硅合金、溴甲酚绿、生物活性玻璃、溴代海因树脂颗粒、红铝、龙涎酮、原丁酸三甲酯
- 主营：叔碳酸、十八醛、溶菌酶、超细球形铜粉、海藻糖、癸二醇、氨基丙基、氢路噻嗪、邻苯二甲、乙基碳二、羟基癸酸、正十七烷、谷胱甘肽、烷二甲醇、松果体素、vc磷酸酯镁、2-甲基丁醛、朱栾倍半萜、丁烷四乙酸、表面活性剂、癸烷撑二醇、缩水甘油邻、10-羟基羊蜡酸、氢氯噻嗪杂质、盐酸邻菲罗啉、壳聚糖季铵盐
- 主营：有机原料、中间体、香精香料、催化剂、有机硅、表面活性剂
- 主营：氧化铝、镍铁粉、钨铁粉、雾化铜粉、白铅粉、氧化硼、锰铁粉、硅铁粉、二氧化锆、氧化钛粉、球形磁粉、钒铁粉末、氧化铋粉、钛铁合金、三氧化钼、氧化镁粉、三氧化二、氧化钴粉、耐火材料、二硫化钨、氧化铬绿、纳米氧化钛、纳米氧化锌、球形磁铁粉、四氧化三铁
- 主营：录放机、包里布、碳化钽、镀铜粉、导电膜、镭射浆、镀铜膜、灌封胶、泡沫铜、钨棒坯、镀铝膜、传感器、镀金片、隔磁片、金浆料、拉丝银、均热板、银溶胶、活性炭、通风板、导电胶、电镀镍、白银浆、高纯锡、高纯锌