Nichrome Ni/Cr Evaporation Powder 99.95% <90 nm ATOMFAIR®

This powder is hygroscopic and may oxidize if exposed to ambient moisture or oxygen, requiring storage in an inert atmosphere or vacuum-sealed container. Deposition must use a water-cooled e-beam hearth with Al2O3/graphite liner to prevent crucible contamination and thermal runaway.

• Moisture Sensitivity: Store powder in a dry, inert-gas-purged container to prevent moisture absorption and particle agglomeration.
• Oxidation Risk: Minimize exposure to air during transfer to avoid surface oxidation that degrades film purity.
• Crucible Compatibility: Use only Al2O3 or graphite liners in a water-cooled e-beam hearth to avoid alloying with tungsten or tantalum boats.

This procedure describes loading Nichrome powder into a water-cooled e-beam hearth and performing evaporation under high vacuum. Proper handling prevents oxidation and ensures uniform film deposition.

Required Equipment: Water-cooled e-beam hearth with Al2O3 liner, Inert-gas glovebox or vacuum transfer vessel

1. Transfer powder to hearth
   Transfer the required mass of Nichrome powder from its sealed container to the Al2O3-lined e-beam hearth inside an inert-gas glovebox to prevent moisture pickup.
2. Evacuate chamber
   Evacuate the deposition chamber to a base pressure below 5×10⁻⁶ Torr to minimize residual gas contamination.
3. Preheat powder gradually
   Apply low e-beam power to outgas the powder for 5 minutes without melting, then ramp power to achieve a stable evaporation rate.
4. Monitor deposition rate
   Monitor the deposition rate using a quartz crystal microbalance and adjust beam current to maintain the target rate within ±5%.
5. Cool and vent chamber
   Allow the hearth to cool below 50°C before venting the chamber with dry nitrogen to prevent oxidation of residual material.

This Nichrome (Ni/Cr) evaporation material in powder form with < 90 nm particle size and 99.95% purity is optimized for e-beam evaporation using a water-cooled e-beam hearth with Al2O3/graphite liner, offering excellent performance for thin-film deposition; thermal/resistive evaporation requires RFQ confirmation.

Positive

• High-purity alloy powder: 99.95% purity and defined Ni/Cr composition ensure consistent film stoichiometry and reduce contamination risk in sensitive thin-film applications.
• Sub-90 nm particle size: Powder < 90 nm facilitates uniform source loading and controlled evaporation rates, particularly beneficial for e-beam deposition where fine powder improves thermal transfer and film uniformity.

Trade-offs

• E-beam evaporation preferred: Thermal/resistive evaporation requires RFQ confirmation, limiting direct drop-in compatibility for labs without e-beam hardware or those needing alternative deposition methods.
• Specialized liner required: Optimal performance demands a water-cooled e-beam hearth with Al2O3/graphite liner; labs lacking this specific setup must verify compatibility or risk hearth damage and reduced film quality.

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).