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Tungsten (W) Evaporation Material, Pellets, 99.95%, 3-6 mm
Product Type: Pure Metal Evaporation Material
Research-grade laboratory product
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LABORATORY PROCUREMENT SUPPORT
For material selection, deposition-source matching, pack-size confirmation or quotation support, contact our technical sales team.
INQUIRY: inquiry@atomfair.com
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Manufacturer: Atomfair LLC
Brand: ATOMFAIR®
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Tungsten evaporation pellets require a vacuum e-beam system with water-cooled copper hearth and a compatible liner for deposition. The material's high melting point and Z-ratio impose specific process calibration and thermal management requirements.
- Deposition Source Compatibility: Use only with water-cooled copper e-beam hearth and a compatible liner (graphite, Al2O3, BN, or Ta).
- Process Calibration: Calibrate the thickness monitor using the Z-ratio of 0.163 for accurate film thickness measurement.
- Thermal Management: Ensure sufficient e-beam power and hearth cooling to handle the material's melting point of 3410°C.
- Pellet Loading: Load pellets of 3-6 mm size uniformly into the source to maintain consistent evaporation rate.
- Application Matching: Match evaporation source hardware and process route to the material's melting point, density, and film requirements.
How does the Z-ratio of 0.163 affect film thickness monitoring during e-beam evaporation of this tungsten pellet?
The Z-ratio of 0.163 is a material-specific acoustic impedance factor used in quartz crystal microbalance (QCM) sensors to correct for the mass of the deposited film. For tungsten, with a density of 19.35 g/cm³ and melting point of 3410°C, the Z-ratio is explicitly provided to ensure accurate real-time thickness measurement. Without this value, the QCM reading would be off by a factor related to the material's acoustic properties, which is critical for achieving precise film thickness in vacuum deposition.
What are the recommended liner materials for evaporating this tungsten pellet, and why must a water-cooled copper hearth be used?
The product description states that a water-cooled copper e-beam hearth is preferred, with compatible liners including graphite, Al2O3, BN, and Ta. Tungsten's extremely high melting point of 3410°C requires a water-cooled hearth to prevent melting of the copper crucible and to maintain thermal stability. The listed liners provide chemical inertness and thermal resistance to avoid contamination and ensure consistent evaporation.
What is the significance of the 3-6 mm pellet size for this tungsten evaporation material in terms of source loading and deposition uniformity?
The pellets are specified as 3-6 mm in size, which is suitable for loading into e-beam hearths and liners without bridging or uneven packing. This size range ensures consistent melt pool formation and stable evaporation rates. The product description explicitly lists this dimension as part of the technical specifications, and buyers are advised to confirm deposition source geometry before ordering.
Tungsten (W) pellets at 99.95% purity, 3-6 mm size, are suitable for e-beam evaporation in research-grade thin-film deposition, but require careful compatibility verification with existing deposition hardware and high-temperature infrastructure.
Positive
- High-purity 99.95% tungsten pellets: The 99.95% purity ensures minimal contamination for thin-film deposition, suitable for applications requiring defined material composition.
- Compatible with e-beam evaporation: Specified for use with water-cooled copper e-beam hearth and liners such as graphite, Al2O3, BN, or Ta, enabling integration into standard vacuum deposition systems.
Trade-offs
- Deposition source compatibility verification required: Buyers must confirm that their evaporation source geometry, liner material, and process parameters are compatible with these pellets, as the material is not universally compatible across all systems.
- High melting point demands robust equipment: With a melting point of 3,410°C, the material requires high-power e-beam sources and effective cooling, increasing infrastructure and operational demands.
Every advanced material, component, equipment, and instrument in our catalog is backed by rigorous testing. We maintain strict internal quality management frameworks and align with CE conformity metrics to deliver transparent, reproducible performance data via our public open-science repository.
To request raw batch performance data, submit formal vendor registration paperwork, or execute a fast-turnaround R&D manufacturing loop, contact us at inquiry@atomfair.com.
Item is dispatched under the Atomfair Shipping & Delivery Framework (Free worldwide shipping on orders over $59 USD excl. heavy equipment). Return is governed by the Atomfair Return & Refund Policy (7-day technical return window).
