Čistý měděný prášek

Overview of Pure Copper Powder

Čistý měděný prášek obsahuje 99,5% nebo vyšší obsah mědi. Poskytuje vynikající tepelnou a elektrickou vodivost v kombinaci s dobrou odolností proti korozi, pájitelností a biologickou kompatibilitou.

Key properties and advantages of pure copper powder:

Pure Copper Powder Properties and Characteristics

Vlastnosti	Podrobnosti
Složení	99.5% or higher copper content
Hustota	8.94 g/cc
Tvar částic	Sférické, nepravidelné
Rozsah velikostí	1-150 mikronů
Zdánlivá hustota	Až 50% skutečné hustoty
Vodivost	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

Živel	Hmotnost %
měď (Cu)	99.5% min
Kyslík (O)	0,05% max
Olovo (Pb)	0.005% max
Ostatní nečistoty	0.005% max

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

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

Vlastnictví	Hodnoty
Hustota	8.94 g/cc
Bod tání	1083°C
Tepelná vodivost	400 W/mK
Elektrický odpor	1.72 μΩ-cm
Teplota rekrystalizace	200-300°C
Curieho teplota	-269°C

• High density compared to magnesium or aluminum
• Excellent thermal conductivity for heat dissipation
• Low electrical resistivity provides high conductivity
• Recrystallization enables sintering and improves ductility
• 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

Vlastnictví	Hodnoty
Pevnost v tahu	220-340 MPa
Pevnost v tahu	69-172 MPa
Prodloužení	35-60%
Tvrdost	45-90 HB
Modul pružnosti	110-130 GPa
Pevnost v tlaku	500-700 MPa

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

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

Průmysl	Používá
Electricals	Contacts, brushes, welding electrodes
Elektronika	Conductive adhesives, RF shielding
Automobilový průmysl	Brushes, bushings, bearings
Průmyslový	Diamond tools, casting molds
Výrobní	Brazing alloys, powder metallurgy
Friction products	Brake pads, clutch discs

Některá specifická použití výrobku:

• Sliding electrical contacts and brushes
• 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

Standard	Popis
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

Ty definují:

• Minimum 99.5% copper content
• Limits on impurities like oxygen and lead
• Required powder characteristics
• 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

Velikost	Charakteristika
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

Zdánlivá hustota	Podrobnosti
Až 50% skutečné hustoty	Pro nepravidelnou morfologii prášku
3.5-5.0 g/cc typical	Zlepšuje se s větší hustotou balení

• Vyšší zdánlivá hustota zlepšuje tok a stlačitelnost prášku.
• Nepravidelná morfologie omezuje maximální hustotu balení
• 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

Metoda	Podrobnosti
Elektrolýza	Copper cathodes dissolved anodically into Cu+ ions and deposited on stainless steel cathodes
Ball milling	Coarse powder broken down and classified into specific sizes
Annealing	Softens the powder particles and improves compressibility
Reducing atmosphere	Prevents oxidation of particles during production

• 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

Faktor	Dopad na cenu
Stupeň čistoty	Vyšší čistota zvyšuje náklady
Velikost částic	Ultrajemný prášek je dražší
Objednané množství	Bulk orders have lower per unit pricing
Způsob výroby	Additional processing increases cost
Balení	Special packaging like vacuum sealing adds cost

Orientační ceny

• Ultrafine pure copper powder: $15-25 per kg
• Coarse pure copper powder: $10-15 per kg
• Large volume pricing can be 40% lower

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

Pure Copper Powder Suppliers

Pure Copper Powder Suppliers

Společnost	Umístění
Kymera International	USA
GGP Metalpowder	Německo
American Chemet Corporation	USA
Šanghaj CNPC Práškový materiál	Čína
Mitsui Kinzoku	Japonsko
Nuclead	Francie

Faktory výběru dodavatelů:

• Purity levels and grades offered
• Production capacity and lead times
• Average particle size ranges
• Customization of size distribution
• Packaging options and order quantities
• Pricing levels based on volume
• Compliance with international specifications

Pure Copper Powder Handling and Storage

Pure Copper Powder Handling

Doporučení	Důvod
Ensure proper ventilation	Prevent exposure to fine particles
Use appropriate PPE	Avoid accidental ingestion
Follow safe protocols	Reduce health hazards
Vyhněte se zdrojům vznícení	Nebezpečí hořlavého prachu
Ground equipment	Prevent static discharge
Používejte nejiskřící nástroje	Prevent possibility of ignition

Doporučení pro ukládání

• Store in stable containers in a cool, dry area
• Limit exposure to acids, ammonia, acetylene
• Maintain temperatures below 30°C

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

Pure Copper Powder Inspection and Testing

Pure Copper Powder Testing

Test	Podrobnosti
Chemická analýza	ICP or XRF verifies composition
Distribuce velikosti částic	Laser diffraction analysis
Zdánlivá hustota	Zkouška Hallovým průtokoměrem podle normy ASTM B212
Morfologie prášku	Zobrazení tvaru částic pomocí SEM
Tap density test	Hustota měřená po mechanickém vyklepání
Analýza průtoku	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

• Vynikající tepelná a elektrická vodivost
• Good corrosion resistance and bio-compatibility
• 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
• Moderate high temperature oxidation resistance
• 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

Parametr	Čistá měď	Brass/Bronze
Hustota	8.94 g/cc	8.7-8.8 g/cc
Síla	220-340 MPa	350-550 MPa
Vodivost	Vynikající	Dobrý
Odolnost proti korozi	Vynikající	Dobrý
Náklady	Nízký	Mírný
Používá	Elektrické, tepelné	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.