纯铝粉

纯铝粉概述

纯铝粉含有 99% 或更高含量的铝。它密度低，具有良好的延展性、导电性和耐腐蚀性。

Key properties and advantages of pure aluminum powder include:

Pure Aluminum Powder Properties and Characteristics

属性	详细信息
组成	99% or higher Al content
密度	2.7 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	出色的导电性和导热性
耐腐蚀性	Good due to protective oxide layer

Pure aluminum powder is suitable for applications like thermite welding, diamond tools, conductive coatings, pyrotechnics, and metal injection molding.

Pure Aluminum Powder Composition

Typical composition of pure aluminum powder:

Pure Aluminum Powder Composition

要素	重量 %
铝 (Al)	99% min
硅 (Si)	0.5% 最大值
铁（Fe）	0.5% 最大值
铜 (Cu)	0.05% 最大值
锰 (Mn)	0.05% 最大值
镁（Mg）	0.05% 最大值
其他杂质	0.05% 最大值

• Aluminum provides low density, ductility and conductivity
• Impurity levels of other elements are carefully controlled
• High aluminum purity provides optimal electrical and thermal conductivity

The high aluminum content ensures excellent conductivity combined with good corrosion resistance and moderate strength.

Pure Aluminum Powder Physical Properties

Pure Aluminum Powder Physical Properties

物业	价值观
密度	2.7 克/立方厘米
熔点	660°C
导热性	237 W/mK
电阻率	2.65 μΩ-cm
CTE	23.1 x 10^-6 /K
Reflectivity	87% at 400 nm wavelength

• Very low density compared to most metals
• High reflectivity and thermal conductivity
• 电阻率低，导电性强
• 相对较高的热膨胀系数要求在设计时必须加以考虑
• Maintains strength up to moderately high temperatures

The properties make pure aluminum suitable for lightweight applications needing electrical/thermal conductivity.

Pure Aluminum Powder Mechanical Properties

Pure Aluminum Powder Mechanical Properties

物业	价值观
拉伸强度	90-100 MPa
屈服强度	35-45 MPa
伸长率	35-40%
硬度	25-35 HB
疲劳强度	50-90 MPa
剪切强度	60-65 MPa

• Relatively low tensile and yield strength
• Very high elongation provides excellent ductility
• Low hardness compared to most metals
• High fatigue strength suited for cyclic loading
• Properties can be enhanced through alloying additions

The properties make pure aluminum suitable for soft, ductile applications requiring conductivity and formability.

Pure Aluminum Powder Applications

Typical applications of pure aluminum powder include:

Pure Aluminum Powder Applications

行业	用途
Thermite welding	Rail welding, metal joining
快速成型制造	Low strength components
Explosives and pyrotechnics	Thermite compositions
Powder coatings	Conductive and resistant coatings
金刚石工具	Metal matrix with diamond particles
Fireworks	Fuel and pyrotechnic compositions

一些具体的产品用途：

• Thermite mixtures for in-situ metal joining and welding
• Low melting point casting alloys
• Electrically conductive coatings and RF shielding
• Aluminum-diamond tools for stone cutting
• Flash powder and pyrotechnic compositions
• Metal injection molding of non-structural parts

The ductility, conductivity and reactivity make pure aluminum suitable for these niche applications.

Pure Aluminum Powder Specifications

Key specifications for pure aluminum powder include:

Pure Aluminum Powder Specifications

标准	说明
ASTM B787	Standard for pure aluminum powders
ASTM B859	Specs for aluminum and aluminum alloy powders
DIN 1718-1	Designation system for aluminum and aluminum alloys
GJB320B	Chinese military standard for aluminum and aluminum alloy powders

这些定义

• Minimum 99% aluminum content
• Limits on impurities like Fe, Si
• Powder characteristics like apparent density and particle size distribution
• Approved production methods like atomization
• Sampling and testing protocols

Meeting the standards ensures suitability for applications needing high purity aluminum powder.

Pure Aluminum Powder Particle Sizes

Pure Aluminum Powder Particle Size Distribution

尺寸	特点
1-10 microns	Ultrafine grade used in printing pastes
10-45 微米	Fine grade suitable for coatings, pressing
45-150 微米	Coarse grade offers better flowability

• Finer sizes provide a smooth finish and high reactivity
• Coarser powder has improved flow for automated processing
• Both spherical and irregular particle shapes are available
• Size distribution depends on targeted use

Controlling particle size distribution optimizes processing behavior, density, reactivity, and finish.

Pure Aluminum Powder Apparent Density

Pure Aluminum Powder Apparent Density

表观密度	详细信息
真实密度高达 50%	用于不规则形态粉末
1.3-1.7 g/cc	Higher for spherical powder

• Spherical powder shape provides higher apparent density
• Irregular particles have lower density around 30-40%
• Higher density improves powder flow and compactibility
• 通过优化球形粉末，可达到 60% 值

表观密度越高，生产效率和零件质量就越好。

Pure Aluminum Powder Production

Pure Aluminum Powder Production

方法	详细信息
雾化	Molten aluminum stream broken into fine droplets that solidify into powder
球磨	Mechanical milling classifies coarse powder into fine powder
退火	Removes internal stresses and improves powder compressibility
筛分	将粉末分级为不同大小的馏分

• Atomization allows large volume production with controlled particle sizes
• Milling provides lower cost size reduction of coarse powder
• Annealing and sieving provide customized powder sizes and shapes

Combination of methods produces high purity aluminum powder with application-specific characteristics.

Pure Aluminum Powder Pricing

Pure Aluminum Powder Pricing

系数	对价格的影响
纯净	高纯度等级的成本更高
颗粒大小	超细粉更贵
订单量	Bulk orders get discounted pricing
生产方法	Complex methods increase cost
包装	Special packaging adds cost

指示性定价

• Fine pure aluminum powder: $3-6 per kg
• Coarse pure aluminum powder: $2-4 per kg
• Large volume pricing can be up to 30% lower

Pricing depends on purity, particle size, order quantity, production method and customization requirements.

Pure Aluminum Powder Suppliers

Pure Aluminum Powder Suppliers

公司名称	地点
Advanced Chemical Company	美国
Micron Metals	美国
Baohua Metal Materials	中国
Hengxing Metallurgical	中国
Shanghai ShuiDing Powder Material	中国
Reade Advanced Materials	美国

供应商的选择因素：

• Purity levels and grades available
• 生产能力和交付周期
• 平均粒径范围
• Customization of particle distribution
• 包装选项
• Pricing levels based on order quantities
• Compliance with international standards

Pure Aluminum Powder Handling and Storage

Pure Aluminum Powder Handling

建议	原因
Use proper ventilation	Avoid concentrated dust environment
Employ grounding systems	Prevent static discharge during handling
Limit moisture exposure	Prevents oxidation of particles
遵循安全协议	减少健康和火灾隐患
避免火源	Flammable powder risk
使用不产生火花的工具	防止点火的可能性

存储建议

• Store in dry, inert sealed containers
• Maintain storage temperatures below 27°C
• Limit exposure to oxidizers like nitric acid

Proper precautions during handling and storage help preserve purity and prevent oxidation or ignition risks.

Pure Aluminum Powder Inspection and Testing

Pure Aluminum Powder Testing

测试	详细信息
化学分析	XRF or ICP testing 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
流速分析	通过指定漏斗的重力流速
湿度测量	干燥试验损耗

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

Pure Aluminum Powder Pros and Cons

Advantages of Pure Aluminum Powder

• Low density provides lightweight properties
• 出色的导电性和导热性
• 良好的耐腐蚀性
• High ductility and excellent formability
• 可回收、环保
• Cost-effective compared to other conductive powders

Limitations of Pure Aluminum Powder

• Low strength limits load bearing structural applications
• Moderate high temperature mechanical strength
• Requires protective coatings in corrosive environments
• Sensitive to contamination from moisture and other powders
• 发火特性要求小心处理
• Gradually oxidizes over time if uncoated

Comparison With Al-Mg Alloy Powder

Pure Al vs Al-Mg Alloy Powder

参数	纯铝	铝镁
密度	2.7 克/立方厘米	2.7 克/立方厘米
实力	90-100 MPa	150-220 MPa
电导率	优秀	良好
耐腐蚀性	良好	优秀
费用	低	高
用途	Thermite welding, pyrotechnics	Structural components

• Pure Al offers better conductivity and lower cost
• Al-Mg alloy provides higher strength
• Pure Al suited for electrical applications and pyrotechnics
• Al-Mg preferred for structural lightweight components

Pure Aluminum Powder FAQs

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

A: Main applications include thermite welding, conductive coatings, pyrotechnic compositions, diamond tools, metal injection molding of non-structural parts, and low-melting casting alloys.

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

A: Recommended precautions include proper ventilation, avoiding ignition sources, explosion-proof equipment, grounding systems, non-sparking tools, protective gear, safe protocols, and inert storage sealed away from contaminants.

Q: How does pure aluminum powder differ from aluminum alloy powders?

A: Pure aluminum has 99% or higher Al content while alloy powders contain other elements like magnesium, silicon, zinc. Pure Al offers high conductivity but lower strength than alloys.

Q: What affects the properties of pure aluminum powder components?

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