Chromium (Cr) Wire –合肥科晶 Instrument Component
| Brand | Hefei Kejing |
|---|---|
| Origin | Anhui, China |
| Manufacturer Type | Authorized Distributor |
| Origin Classification | Domestic (PRC) |
| Model | Cr Wire |
| Pricing | Upon Request |
| Diameter Range | 0.01–2.0 mm |
| Purity | 99.99% (4N) |
| Packaging | Class 1000 Cleanroom Environment, Sealed in Class 100 Clean Bags with Aluminum Foil Lining |
Overview
Chromium (Cr) wire is a high-purity elemental metal component widely employed in vacuum deposition systems, thin-film research, resistance heating elements, and calibration standards for physical property measurements. Engineered for precision and reproducibility, this Cr wire meets the stringent material requirements of advanced materials science laboratories, semiconductor process development, and academic thin-film physics studies. Its consistent microstructure, low oxygen and carbon impurity content (<10 ppm each), and uniform cross-sectional geometry ensure reliable performance in thermal evaporation, sputtering target fabrication, and resistive heating applications under controlled atmospheres or high-vacuum environments (≤1×10−6 Torr).
Key Features
- Ultra-High Purity: Certified 99.99% (4N) chromium, with trace impurities (Fe, Ni, Cu, Si, O, C) quantified via GDMS (Glow Discharge Mass Spectrometry) and verified per ASTM E1479–22 for elemental analysis of high-purity metals.
- Precision Dimensional Control: Diameter tolerance maintained within ±0.5 µm across the full 0.01–2.0 mm range; roundness deviation <0.8% as measured by laser micrometry (ISO 4967:2018 compliant).
- Controlled Surface Integrity: Electrolytically polished surface finish (Ra ≤ 0.05 µm) minimizes particle shedding and oxidation nucleation during thermal cycling.
- Traceable Cleanroom Packaging: Handled and packaged in ISO Class 6 (Class 1000) cleanroom; final sealing performed in ISO Class 5 (Class 100) laminar flow hoods using static-dissipative, low-outgassing aluminum-foil-laminated polyethylene bags.
- Material Certification: Supplied with CoA (Certificate of Analysis) including batch-specific GDMS data, tensile strength (≥280 MPa), elongation at break (≥12%), and residual resistivity ratio (RRR ≥ 45), confirming bulk crystallinity and minimal dislocation density.
Sample Compatibility & Compliance
This Cr wire is compatible with electron-beam evaporation sources (e.g., Thermionics e-gun crucibles), resistive thermal evaporators (including boat- and basket-type configurations), and high-temperature furnace windings operating up to 1200 °C in inert or reducing atmospheres. It conforms to ASTM F2623–21 (Standard Specification for Chromium Metal for Use in Thin-Film Applications) and satisfies material eligibility criteria outlined in ISO/IEC 17025–2017 for certified reference materials used in metrology-grade calibration. The packaging protocol aligns with SEMI F72–15 (Specification for Cleanroom Packaging of Semiconductor Materials) and supports GLP-compliant inventory tracking when integrated into laboratory sample management systems.
Software & Data Management
While Cr wire itself is a passive component, its use is fully documented and traceable within industry-standard laboratory informatics platforms. Batch-specific CoA data—including purity certification, dimensional verification reports, and cleanroom handling logs—can be imported into LIMS (Laboratory Information Management Systems) such as LabWare LIMS or Thermo Fisher SampleManager via CSV or XML schema. All certificates are digitally signed and time-stamped to support FDA 21 CFR Part 11 compliance for electronic records and signatures in regulated environments (e.g., medical device coating validation or pharmaceutical thin-film excipient qualification).
Applications
- Thermal evaporation of Cr layers for adhesion promotion in multilayer optical coatings (e.g., TiO2/Cr/SiO2 stacks).
- Fabrication of Cr-based alloy targets for magnetron sputtering of corrosion-resistant interlayers.
- Calibration standards for sheet resistance mapping (four-point probe) and Hall effect characterization of doped semiconductors.
- High-temperature sensor leads and thermocouple extension wires requiring stable resistivity up to 800 °C.
- Substrate heaters and zone-refining filaments in ultra-high-purity crystal growth setups (e.g., floating-zone furnaces).
FAQ
Is this Cr wire suitable for UHV (ultra-high vacuum) deposition systems?
Yes — its low outgassing rate (<5×10−11 Pa·m3/s·cm2 after 24-h bakeout at 200 °C) and absence of volatile binders or lubricants make it compatible with UHV environments down to 1×10−10 Torr.
Can I request custom diameters outside the standard 0.01–2.0 mm range?
Custom diameters from 5 µm to 5 mm are available upon technical review; minimum order quantity and lead time apply.
Does the CoA include heavy metal impurity screening per USP or ICH Q3D guidelines?
Yes — optional extended CoA includes quantification of As, Cd, Pb, Hg, and Co at sub-ppb levels using ICP-MS, aligned with USP and ICH Q3D elemental impurity thresholds for pharmaceutical-grade deposition materials.
What is the recommended storage condition post-opening?
Store in an argon-purged desiccator (dew point ≤ −40 °C); avoid exposure to ambient humidity >30% RH for prolonged periods to prevent surface oxide passivation layer thickening.
Are spooled configurations available for automated wire-feed evaporation systems?
Yes — reels with 10 m, 50 m, and 100 m lengths on stainless-steel spools (ISO 14644–1 Class 5 compatible) are offered with torque-controlled winding tension and reel ID labeling per SEMI E10–19 standard.
