Ag Wire (99.99% Pure) – Hefei Kejing Instrument Component
| Brand | Hefei Kejing |
|---|---|
| Origin | Anhui, China |
| Manufacturer Type | Authorized Distributor |
| Origin Category | Domestic (China) |
| Model | Ag Wire |
| Pricing | Upon Request |
| Diameter & Length Options | φ0.025 mm × 500 m |
| Packaging | Class 1000 Cleanroom-Packaged in Class 100 Clean Bags |
Overview
Ag Wire (99.99% pure silver) is a high-purity instrument-grade metallic component engineered for precision applications in scientific instrumentation, vacuum systems, electrical calibration standards, and thin-film deposition setups. Fabricated from electrolytically refined silver with controlled oxygen content and minimal interstitial impurities, this wire exhibits face-centered cubic (FCC) crystalline structure, exceptional ductility, and among the highest thermal and electrical conductivities of all elemental metals—second only to copper on a per-unit-mass basis and exceeding copper in absolute volumetric conductivity at room temperature. Its mechanical softness and superior workability enable reliable wire bonding, filament winding, and microelectrode fabrication without cold cracking or grain boundary fracture under standard handling conditions.
Key Features
- Ultra-high purity grade: 4N (99.99% Ag), certified via GDMS (Glow Discharge Mass Spectrometry) and verified against ASTM E1479–22 for trace metal impurity profiling
- Consistent dimensional tolerance: ±1.5% diameter control across full spool length; surface roughness Ra ≤ 0.15 µm as measured by contact profilometry
- Controlled metallurgical condition: Annealed state ensures uniform recrystallized grain structure (average grain size 15–25 µm) and optimal tensile elongation (>45% for φ0.3 mm)
- Cleanroom-compatible packaging: Supplied in ISO Class 6 (1000) cleanroom environment, double-bagged in ISO Class 5 (100) polyethylene laminated clean bags with nitrogen purge and desiccant
- Traceability documentation: Each lot includes CoA (Certificate of Analysis) listing residual elements (e.g., Cu, Fe, Ni, Pb, Sb, Bi < 1 ppm each) and oxygen content (< 5 ppm)
Sample Compatibility & Compliance
This Ag wire is compatible with ultra-high vacuum (UHV) systems operating down to 1×10−10 mbar, having undergone outgassing characterization per ASTM E1557–21. It meets material requirements for use in cryogenic sensor leads (4 K to 300 K), thermocouple extension wiring (Type T reference junctions), and sputtering targets for optical coatings. The product conforms to RoHS Directive 2011/65/EU Annex II maximum concentration values and is exempt from REACH SVHC candidate list inclusion per ECHA’s latest update. While not a finished instrument, it supports compliance pathways for end-user equipment subject to FDA 21 CFR Part 11 (when integrated into validated analytical hardware), ISO/IEC 17025 calibration chains, and GLP-regulated material synthesis workflows.
Software & Data Management
As a passive instrumentation component, Ag Wire does not incorporate embedded firmware or require driver software. However, its certified purity and metrological traceability data are digitally archived in Hefei Kejing’s LIMS (Laboratory Information Management System), accessible to qualified customers via secure portal login upon purchase order verification. Batch-specific CoA files are provided in PDF/A-1b and machine-readable CSV formats, supporting integration into enterprise QMS platforms such as TrackWise or MasterControl. All certificates include digital signatures compliant with eIDAS Regulation (EU No 910/2014) for legal validity in regulated environments.
Applications
- Reference electrodes and current collectors in electrochemical cells (e.g., rotating disk electrode studies per ASTM G102)
- Filament material for thermal evaporation sources in physical vapor deposition (PVD) systems
- Calibration standards for four-point probe resistivity mapping and Hall effect measurements
- Interconnect wiring in low-noise cryogenic amplifiers and quantum device packaging
- Substrate for epitaxial growth of superconducting oxides (e.g., YBCO) where lattice matching and thermal expansion compatibility are critical
- Component in custom-built Faraday cages and RF shielding gaskets requiring non-magnetic, high-conductivity filler wires
FAQ
Is this Ag wire suitable for UHV applications?
Yes—tested per ASTM E1557 for total mass loss (TML) < 0.05% and collected volatile condensable materials (CVCM) < 0.01% after 24 h at 125 °C under vacuum.
What is the maximum recommended operating temperature in inert atmosphere?
Continuous service up to 350 °C; short-term exposure (≤1 h) permissible to 500 °C with negligible grain coarsening or oxide formation under N2 or Ar.
Can custom diameters or spool lengths be supplied?
Yes—Hefei Kejing offers OEM spooling and precision drawing services for diameters from φ0.01 mm to φ2.0 mm, subject to minimum order quantity and lead time confirmation.
Does the CoA include oxygen content analysis?
Yes—oxygen is quantified via inert gas fusion infrared detection (ASTM E1019) and reported in all standard CoAs.
Is re-certification available for opened packages?
No—cleanroom integrity is compromised upon bag opening; users requiring re-verification must submit samples to an accredited third-party lab (e.g., SGS or Bureau Veritas) using ASTM E1479 methodology.
