纯铜粉

Overview of Pure Copper Powder

纯铜粉含铜量为 99.5% 或更高。它具有出色的导热性和导电性，并具有良好的耐腐蚀性、可焊性和生物相容性。

Key properties and advantages of pure copper powder:

Pure Copper Powder Properties and Characteristics

属性	详细信息
组成	99.5% or higher copper content
密度	8.94 克/立方厘米
粒子形状	球形、不规则
尺寸范围	1-150 microns
表观密度	真实密度高达 50%
电导率	Excellent, second only to silver
Solderability	Excellent due to oxidation resistance
Bio-compatibility	High, safe for food contact

Pure copper powder is ideal for applications like welding products, brazing alloys, friction materials, diamond tools, electrical contacts, and metal injection molding.

Pure Copper Powder Composition

Typical composition of pure copper powder:

Pure Copper Powder Composition

要素	重量 %
铜 (Cu)	99.5% min
氧气 (O)	0.05% 最大值
铅 (Pb)	0.005% 最大值
其他杂质	0.005% 最大值

• Copper provides excellent conductivity and corrosion resistance
• 作为杂质存在的氧气会影响导电性和烧结
• 严格控制铅和其他杂质

High copper content, low oxide, and minimal impurities result in excellent electrical and thermal conductivity combined with good mechanical properties.

Pure Copper Powder Physical Properties

Pure Copper Powder Physical Properties

物业	价值观
密度	8.94 克/立方厘米
熔点	1083°C
导热性	400 W/mK
电阻率	1.72 μΩ-cm
再结晶温度	200-300°C
居里温度	-269°C

• High density compared to magnesium or aluminum
• Excellent thermal conductivity for heat dissipation
• 电阻率低，导电性强
• 再结晶可实现烧结并提高延展性
• Resistivity increases above Curie point

These properties make pure copper suitable for highly conductive components like electrical contacts and brushes.

Pure Copper Powder Mechanical Properties

Pure Copper Powder Mechanical Properties

物业	价值观
拉伸强度	220-340 兆帕
屈服强度	69-172 MPa
伸长率	35-60%
硬度	45-90 HB
弹性模量	110-130 GPa
抗压强度	500-700 兆帕

• Good combination of strength and very high ductility
• 硬度相对较低，延展性较高
• Moderate strength compared to high strength alloys
• 特性取决于孔隙率和颗粒大小等因素

The properties make pure copper suitable for soft, highly conductive components requiring good deformation and compressive strength.

Pure Copper Powder Applications

Typical applications of pure copper powder include:

Pure Copper Powder Applications

行业	用途
Electricals	Contacts, brushes, welding electrodes
电子产品	Conductive adhesives, RF shielding
汽车	电刷、衬套、轴承
工业	Diamond tools, casting molds
制造业	Brazing alloys, powder metallurgy
摩擦产品	刹车片、离合器盘

一些具体的产品用途：

• 滑动电触点和电刷
• Heat sinks and thermal management components
• Welding rods, brazing pastes, and solder filler metal
• Metal matrix composites like diamond tools
• Net shape components made via metal injection molding
• Pump bushings, impellers, and other wear parts

The high conductivity, corrosion resistance, bio-compatibility and moderate strength make pure copper suitable for this diverse range of electrical, thermal, and moderate wear applications across all industries.

Pure Copper Powder Specifications

Key specifications for pure copper powder include:

Pure Copper Powder Specifications

标准	说明
ASTM B602	Specification for high purity electrolytic copper powder
JIS H2111	Specs for electrolytic copper and copper alloy powders
ISO 3497	Specification for general purpose copper powders
ASTM B243	Guidance on apparent density and flow rate

这些定义

• Minimum 99.5% copper content
• Limits on impurities like oxygen and lead
• 所需的粉末特性
• Apparent density and flow rate
• Approved production method – electrolytic
• Sampling and testing protocols

Meeting these specifications ensures suitability for applications needing high thermal and electrical conductivity combined with good mechanical properties.

Pure Copper Powder Particle Sizes

Pure Copper Powder Particle Size Distribution

尺寸	特点
1-10 microns	Ultrafine grade used in microelectronics
10-30 microns	Fine grade suitable for sintering
30-150 microns	Coarse grade has good flow for pressing

• Finer sizes provide higher sintered density
• Coarser powder has improved flowability
• Size range tailored based on targeted application
• Both spherical and irregular shapes available

Controlling particle size distribution optimizes pressing behavior, sintered density and final part properties.

Pure Copper Powder Apparent Density

Pure Copper Powder Apparent Density

表观密度	详细信息
真实密度高达 50%	用于不规则粉末形态
典型值为 3.5-5.0 g/cc	提高包装密度

• 更高的表观密度可改善粉末流动性和可压缩性
• 不规则形态限制了最大堆积密度
• Values up to 60% achievable with spherical powder
• High apparent density enables easier compaction

Higher apparent density leads to more efficient powder pressing and sintering to full density.

Pure Copper Powder Production

Pure Copper Powder Production

方法	详细信息
电解	Copper cathodes dissolved anodically into Cu+ ions and deposited on stainless steel cathodes
球磨	Coarse powder broken down and classified into specific sizes
退火	软化粉末颗粒，提高可压缩性
减少大气	防止颗粒在生产过程中氧化

• Automated electrolytic process allows large scale production
• Milling and sieving provides controlled particle size distribution
• Annealing facilitates pressing and handling
• Strict process control ensures high purity and repeatable quality

Pure Copper Powder Pricing

Pure Copper Powder Pricing

系数	对价格的影响
纯度等级	纯度越高，成本越高
颗粒大小	超细粉更贵
订购数量	Bulk orders have lower per unit pricing
生产方法	额外的处理增加了成本
包装	真空密封等特殊包装会增加成本

指示性定价

• Ultrafine pure copper powder: $15-25 per kg
• Coarse pure copper powder: $10-15 per kg
• 大批量生产价格可低 40%

Pricing depends on purity, particle size, production method, order quantity, packaging etc.

Pure Copper Powder Suppliers

Pure Copper Powder Suppliers

公司名称	地点
凯美拉国际公司	美国
GGP 金属火药	德国
美国凯美特公司	美国
上海中石油粉体材料有限公司	中国
Mitsui Kinzoku	日本
Nuclead	法国

供应商的选择因素：

• Purity levels and grades offered
• 生产能力和交付周期
• 平均粒径范围
• 尺寸分布定制
• Packaging options and order quantities
• Pricing levels based on volume
• 符合国际规范

Pure Copper Powder Handling and Storage

Pure Copper Powder Handling

建议	原因
确保适当的通风	Prevent exposure to fine particles
使用适当的个人防护设备	避免误食
遵循安全协议	Reduce health hazards
避免火源	易燃粉尘危险
Ground equipment	Prevent static discharge
使用不产生火花的工具	防止点火的可能性

存储建议

• Store in stable containers in a cool, dry area
• Limit exposure to acids, ammonia, acetylene
• 将温度保持在 30°C 以下

Proper precautions during handling and storage help preserve purity and prevent safety issues.

Pure Copper Powder Inspection and Testing

Pure Copper Powder Testing

测试	详细信息
化学分析	ICP or XRF verifies composition
粒径分布	激光衍射分析
表观密度	霍尔流量计测试符合 ASTM B212 标准
粉末形态	颗粒形状的扫描电镜成像
水龙头密度测试	机械敲击后测量的密度
流速分析	Gravity flow through a specified funnel

Testing ensures the powder meets the required purity levels, particle characteristics, density specifications, morphology and flowability as per applicable standards.

Pure Copper Powder Pros and Cons

Advantages of Pure Copper Powder

• Excellent thermal and electrical conductivity
• 良好的耐腐蚀性和生物兼容性
• High purity provides optimal performance
• Easy to sinter and compress into high density components
• Ductile and malleable
• Recyclable and environmentally sustainable

Limitations of Pure Copper Powder

• Lower strength than many alloy powders
• 适度的高温抗氧化性
• Heavy compared to magnesium or aluminum
• Not suitable for high wear or load bearing applications
• Sensitive to contamination from zinc and sulfur
• Gradually tarnishes over time if uncoated

Comparison With Brass and Bronze Powders

Pure Copper vs. Brass and Bronze Powders

参数	Pure Copper	Brass/Bronze
密度	8.94 克/立方厘米	8.7-8.8 g/cc
实力	220-340 兆帕	350-550 兆帕
电导率	优秀	良好
耐腐蚀性	优秀	良好
费用	低	中度
用途	Electrical, thermal	Hardware, decorative

• Pure copper has higher conductivity and ductility
• Brass/bronze offer higher strength
• Pure copper better suited for thermal management
• Brass/bronze used for hardware and decorative items

Pure Copper Powder FAQs

Q: What are the main applications of pure copper powder?

A: Main applications include electrical contacts and brushes, welding rods, brazing alloys, diamond tools, heat sinks, net shape components made via powder metallurgy, friction materials, and conductive adhesives.

Q: What precautions should be taken when working with pure copper powder?

A: Recommended precautions include proper ventilation, appropriate PPE, safe handling protocols, grounding equipment, avoiding ignition sources, using non-sparking tools, and storing in stable inert containers away from contaminants.

Q: How does pure copper powder differ from electrolytic tough pitch (ETP) copper?

A: Pure copper powder has 99.5% or higher copper content, while ETP copper powder has minimum 99.5% copper. Pure copper provides slightly higher conductivity but the two are mostly interchangeable for common applications.

Q: What affects the properties of parts made from pure copper powder?

A: Key factors are apparent density, powder composition, particle size distribution, compaction pressure, sintering parameters, presence of impurities, and final part porosity.