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Tungsten (W) Evaporation Material, Pellets, 99.99%, 1-3 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 material requires e-beam deposition in vacuum using a water-cooled copper hearth with compatible liners. The high melting point (3,410°C) and Z-ratio (0.163) demand precise power control and crystal monitor calibration.
- Deposition Source Compatibility: Use e-beam evaporation with a water-cooled copper hearth and select liners from graphite, Al2O3, BN, or Ta to avoid contamination.
- Pellet Size and Loading: The 1-3 mm pellet form is suitable for direct loading into the hearth without additional processing.
- Z-Ratio Correction: Apply a Z-ratio of 0.163 when calibrating the quartz crystal microbalance for accurate film thickness monitoring.
- Procurement Confirmation: Confirm model, purity, form, size, pack size, and deposition-source compatibility before ordering to ensure proper match.
How does the pellet size of 1-3 mm influence the evaporation rate and film uniformity in e-beam deposition of tungsten?
The 1-3 mm pellet size is deliberately chosen to balance source loading convenience and evaporation rate control. Smaller pellets increase surface area, potentially accelerating evaporation but risking non-uniform feeding, while larger pellets may slow evaporation. The specified size range supports consistent evaporation review and deposition process matching for high-purity tungsten films.
What liner materials are compatible with e-beam evaporation of tungsten pellets from a water-cooled copper hearth?
Compatible liner materials include graphite, Al2O3, BN, and Ta. These liners are selected to withstand the high melting point of tungsten (3,410 °C) and prevent contamination of the 99.99% pure evaporation material. The water-cooled copper hearth is the preferred evaporation source.
What is the Z-ratio of tungsten evaporation pellets and why is it important for process control?
The Z-ratio of tungsten is 0.163. This parameter is critical for accurate thickness monitoring using a quartz crystal microbalance (QCM) during e-beam evaporation. An incorrect Z-ratio leads to systematic errors in film thickness measurement, especially for high-density materials like tungsten (density 19.35 g/cm³).
Tungsten (W) pellets with 99.99% purity and 1-3 mm size are suitable for e-beam evaporation in high-temperature thin-film deposition, requiring water-cooled copper hearth and compatible liners for thermal management.
Positive
- High purity 99.99%: The 99.99% purity specification minimizes contamination in deposited films, supporting repeatable thin-film properties for research and device fabrication.
- Controlled pellet size 1-3 mm: The defined pellet size range facilitates consistent source loading and uniform evaporation rate in e-beam systems, reducing process variability.
Trade-offs
- High melting point 3410°C: The extremely high melting point requires robust e-beam power and water-cooled copper hearth to prevent thermal damage, increasing infrastructure demands.
- High density 19.35 g/cm³: The high density of tungsten pellets may cause uneven loading or require careful crucible design to avoid source depletion effects during evaporation.
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).
