銅 99.95 粉末

Overview of Cu 99.95 Powder

Cu 99.95 powder, also referred to as electrolytic tough pitch (ETP) copper powder, is a high purity copper powder containing a minimum of 99.95% copper.

It has excellent electrical and thermal conductivity combined with good mechanical properties. Key applications include electrical contacts, brushes, welding products, brazing, friction materials and diamond tools.

Some key properties and advantages of Cu 99.95 powder include:

Cu 99.95 Powder Properties and Characteristics

プロパティ	詳細
構成	99.95% minimum copper
密度	8.94 g/cc
粒子形状	不規則、角張っている
サイズ範囲	2-150 microns
見かけ密度	最大 50% の真密度
流動性	Low to moderate
導電率	Excellent electrical and thermal conductivity
焼結性	Good sinterability in H2 atmosphere
純度	High purity copper

Cu 99.95 provides an optimal balance of conductivity, mechanical properties, sintering characteristics and cost for fabrication of parts via pressing and sintering.

Cu 99.95 Powder Composition

Typical composition of Cu 99.95 powder:

Cu 99.95 Powder Composition

エレメント	重量 %
銅（Cu）	99.95% min
酸素 (O)	0.05%最大
鉛(Pb)	0.005% max
その他の不純物	0.005% max

• Copper provides excellent conductivity and ductility
• Oxygen present as impurity affects conductivity and sintering
• Lead and other impurities carefully controlled

High copper content gives excellent electrical and thermal conductivity combined with good mechanical properties after sintering.

Cu 99.95 Powder Physical Properties

Cu 99.95 Powder Physical Properties

プロパティ	価値観
密度	8.94 g/cc
融点	1083°C
熱伝導率	400 W/mK
電気抵抗率	1.72 μΩ-cm
再結晶温度	200-300°C
キュリー温度	-269°C

• High density compared to iron and aluminum
• Excellent thermal conductivity for heat removal
• Low electrical resistivity provides high conductivity
• Resistivity increases above Curie temperature
• Recrystallization enables sintering and improves ductility

The physical properties make Cu 99.95 suitable for applications like electrical contacts and brushes requiring high conductivity.

Cu 99.95 Powder Mechanical Properties

Cu 99.95 Powder Mechanical Properties

プロパティ	価値観
引張強さ	220-340 MPa
降伏強度	70-190 MPa
伸び	35-60%
硬度	45-90 HB
弾性係数	110-130 GPa
圧縮強度	500-700 MPa

• Good combination of strength and high ductility
• Relatively low hardness and high malleability
• Moderate strength levels compared to high strength alloys
• Properties depend on factors like porosity and grain size

The mechanical properties make Cu 99.95 suitable for softer conductive components that require deformation and compressive strength.

Cu 99.95 Powder Applications

Typical applications of Cu 99.95 powder include:

Cu 99.95 Powder Applications

産業	応用例
Electrical and electronics	Contacts, connectors, brushes, RF shielding
自動車	Brushes, bushings, bearings
インダストリアル	Welding electrodes, casting molds, metal matrix composites
製造業	Brazing and soldering, tooling components
Friction products	Brake pads, clutch discs

いくつかの具体的な用途:

• Sliding electrical contacts and brushes
• Structural components requiring conductivity
• Jewelry crafting and artisanal products
• Diamond tools with copper metal matrix
• Welding rods and brazing paste formulations
• Mold liners for casting reactive alloys

The excellent balance of conductivity, mechanical properties, formability and cost make Cu 99.95 suitable for this broad range of applications.

Cu 99.95 Powder Specifications

Key specifications for Cu 99.95 powder include:

Cu 99.95 Powder Specifications

スタンダード	説明
ASTM B602	Standard specification for undeformed, wrought, electrolytic tough pitch copper
JIS H3125	Electrolytic copper and copper alloy powders
ISO 3497	Copper powders for general purposes
ASTM B Guidance	Apparent density, flow rate, particle size distribution

これらの標準では以下が定義されています。

• Minimum 99.95% copper content
• Limits on impurities like O, Pb
• Required powder characteristics
• Production method – electrolytic process
• 許容可能な粒度分布
• Testing methods for powder properties

Compliance ensures the powder meets the required purity and properties for the intended application.

Cu 99.95 Powder Particle Sizes

Cu 99.95 Powder Particle Size Distribution

粒子径	特徴
2-20 microns	Very fine powder used in microelectronics
5-30 microns	Fine powder for sintering and injection molding
15-150ミクロン	Coarse powder suitable for pressing

• Finer powder sizes provide greater sintered density
• Coarse powder has better flowability for automated filling
• Size range tailored based on part requirements
• Both irregular and spherical powder shapes are available

Controlling particle size distribution allows optimizing pressing characteristics, sintered density and properties.

Cu 99.95 Powder Apparent Density

Cu 99.95 Powder Apparent Density

見かけ密度	詳細
最大 50% の真密度	不規則な粉末形態の場合
3.5-5.0 g/cc typical	Compacts to nearly full density after pressing and sintering

• より高い見掛け密度により、粉末の流れと圧縮性が向上します
• 不規則な形態により最大充填密度が制限される
• 最適化された球状粉末により60%まで可能
• High green density after compaction enables good sintering

Higher apparent density improves manufacturing productivity and part quality.

Cu 99.95 Powder Production Method

Cu 99.95 Powder Production

方法	詳細
電解	Copper cathodes dissolved anodically into Cu+ ions which are deposited onto stainless steel cathodes
研削	Coarse powder broken down and classified into specific size ranges
アニーリング	Softens the powder particles and improves compressibility
Reducing atmosphere	Prevents oxidation of particles during production

• Automated electrolytic process allows high purity powder production
• Grinding and sieving provides controlled particle size distribution
• Annealing enables easy compaction into high density parts
• Strict process control ensures reliable and consistent powder quality

Cu 99.95 Powder Pricing

Cu 99.95 Powder Pricing

ファクター	価格への影響
純度グレード	高純度グレードはより高価
粒子径	Ultrafine is more expensive
注文数量	Price decreases with bulk orders
製造方法	Additional processing increases cost
パッケージング	Special packaging like vacuum sealing adds cost

参考価格

• Cu 99.95 fine powder: $8-12 per kg
• Cu 99.95 coarse powder: $7-10 per kg
• Reduced pricing applicable for bulk orders >500 kg

Pricing depends on order volume, particle size, production method, purity level and packaging.

Cu 99.95 Powder Suppliers

Cu 99.95 Powder Suppliers

会社概要	所在地
カイメラ・インターナショナル	アメリカ
GGP Metalpowder	ドイツ
アメリカン・ケメット・コーポレーション	アメリカ
上海CNPC粉末材料	中国
Nuclead	フランス
Libo Metals	中国

サプライヤーの選択要素：

• Powder purity levels and grades offered
• 生産能力とリードタイム
• Average particle size ranges
• Customization of size distribution
• Packaging and minimum order quantity
• 注文量に応じた価格設定
• Compliance with international specifications

Cu 99.95 Powder Handling and Storage

Cu 99.95 Powder Handling

推薦	理由
吸入を避ける	呼吸器への刺激の可能性
Use masks, gloves	Prevent ingestion
十分な換気の確保	浮遊粒子を減らす
発火源を避ける	可燃性粉塵の危険性
静電気防止手順に従ってください	静電気放電による火災の防止
火花の出ない工具を使用する	Avoid ignition during handling
Store in cool, dry location	酸化と吸湿を防ぐ

ストレージに関する推奨事項

• Store in sealed containers away from acids or chlorides
• 気温を27℃以下に保つ
• Limit exposure to:
  • Oxidizing acids like nitric acid
  • Hot sulfuric acid
  • Hydrogen sulfide
  • Ammonia solutions
  • Chlorinated hydrocarbons

Proper handling and storage helps preserve purity and prevent reactivity or fire hazards.

Cu 99.95 Powder Inspection and Testing

Cu 99.95 Powder Testing

テスト・タイプ	詳細
化学分析	ICP analysis to verify composition
粒度分布	レーザー回折分析
見かけ密度	ASTM B212に準拠したホール流量計テスト
粉末形態	SEMイメージング
タップ密度	Measured after mechanical tapping
流量分析	指定ノズルを通る重力流量

Stringent testing ensures the powder meets chemical, physical and morphological specifications required for the application.

Cu 99.95 Powder Pros and Cons

Advantages of Cu 99.95 Powder

• Excellent electrical and thermal conductivity
• Good ductility and malleability
• Cost-effective compared to pure silver or gold
• Good corrosion resistance and bio-compatibility
• Easy to sinter and compress into high density parts
• リサイクル可能で環境に優しい

Limitations of Cu 99.95 Powder

• Lower strength than high strength alloys
• 適度な高温耐酸化性
• Heavy compared to magnesium and aluminum
• Not suitable for highly stressed load-bearing components
• Surface tarnishing over time if uncoated
• Restricted food contact applications

Comparison With CuCrZr Powder

Cu 99.95 vs CuCrZr Powder

パラメータ	Cu 99.95	CuCrZr
密度	8.94 g/cc	8.8 g/cc
強さ	220-340 MPa	450～650MPa
導電率	素晴らしい	中程度
熱安定性	フェア	素晴らしい
コスト	低い	高い
用途	Electrical, thermal,moderate load	High strength structural parts

• Cu 99.95 has better conductivity and lower cost
• CuCrZr provides higher strength and thermal stability
• Cu 99.95 suitable for softer conductive components
• CuCrZr preferred for high load structural parts

Cu 99.95 Powder FAQs

Q: What are the main applications of Cu 99.95 powder?

A: The main applications include electrical contacts, brushes, welding products, diamond tools, brazing alloys, friction materials, and metal matrix composites. It is widely used in electronics, automotive and industrial products.

Q: What affects the properties of Cu 99.95 powder parts?

A: Key factors affecting properties are apparent density, amount of lubricant, compacting pressure, sintering time/temperature, powder composition, particle size distribution, and presence of impurities.

Q: What precautions should be taken when handling Cu 99.95 powder?

A: Recommended precautions include avoiding inhalation, ensuring proper ventilation, wearing protective gear, controlling static discharge, using non-sparking tools, avoiding ignition sources, and storing in a cool, dry location in sealed containers.

Q: How does Cu 99.95 powder differ from bronze and brass powders?

A: Bronze and brass are copper alloys with tin and zinc while Cu 99.95 is pure copper. It has higher conductivity but lower strength than bronze or brass. Cu 99.95 is more cost-effective.