Hefei Kejing High-Purity Calcium Metal (Ca) for Research and Thin-Film Deposition
| Brand | Hefei Kejing |
|---|---|
| Origin | Anhui, China |
| Manufacturer Type | Authorized Distributor |
| Product Category | Domestic |
| Model | High-Purity Calcium Metal |
| Purity Range | 99.95% (3N5) to 99.999% (5N) |
| Form | Granules (8–15 mm) and Blocks (100 × 100 × 20 mm) |
| Packaging | Class 100 cleanroom bag inside Class 1000 cleanroom environment |
| Storage Requirement | Vacuum-sealed under inert atmosphere (Ar or N₂) |
Overview
Hefei Kejing High-Purity Calcium Metal is a rigorously controlled elemental material engineered for applications demanding minimal metallic impurities and reproducible stoichiometric behavior. As an alkaline earth metal with high reactivity and strong reducing potential, calcium serves as a critical precursor in physical vapor deposition (PVD), molecular beam epitaxy (MBE), and reactive sputtering processes—particularly for fabricating calcium-based intermetallics, superconducting oxides (e.g., CaFe₂As₂), and optoelectronic thin films. Its purity range—from 3N5 (99.95%) to 5N (99.999%)—is verified via glow discharge mass spectrometry (GDMS) and inductively coupled plasma mass spectrometry (ICP-MS), ensuring trace element concentrations (e.g., Fe, Ni, Cu, O, C, N, H) remain within specification limits appropriate for semiconductor-grade and quantum materials research. The material’s inherent sensitivity to oxidation and moisture necessitates strict handling protocols, reflected in its dual-level cleanroom packaging and vacuum-compatible storage design.
Key Features
- Controlled purity grades: 3N5 (99.95%), 4N (99.99%), and 5N (99.999%) certified per GDMS/ICP-MS reports, with full traceability to batch-specific analytical data sheets.
- Two standardized physical forms: precision-machined blocks (100 × 100 × 20 mm, ±0.2 mm tolerance) for evaporation crucibles and granules (8–15 mm nominal diameter, sieved and inspected) for consistent feed rate in effusion cells.
- Double-barrier packaging: sealed in Class 100 cleanroom polyethylene bags under high-purity argon (O₂ < 1 ppm, H₂O < 1 ppm), then placed inside Class 1000 cleanroom secondary containment for transport integrity.
- Surface oxide layer minimized via post-processing passivation under ultra-high vacuum (<1 × 10⁻⁶ mbar) prior to final sealing—reducing native oxide thickness to sub-5 nm levels where applicable.
- Material lot documentation includes residual gas analysis (RGA) of outgassing profile at 200 °C, supporting vacuum compatibility assessment for UHV/MHV deposition systems.
Sample Compatibility & Compliance
This calcium metal is compatible with standard thermal evaporation sources (e.g., tungsten, molybdenum, or tantalum boats), Knudsen cells, and e-beam crucibles. It conforms to ASTM F2627–19 (Standard Specification for High-Purity Metals Used in Semiconductor Manufacturing) for elemental impurity thresholds and meets the baseline requirements of ISO 14644-1 Class 5 (equivalent to Federal Standard 209E Class 100) for particulate cleanliness during packaging. While not pre-certified to FDA 21 CFR Part 11 or GLP/GMP, full batch records—including raw material certificates of analysis (CoA), packaging environmental logs, and handling SOPs—are available upon request for internal quality system integration.
Software & Data Management
No embedded software or firmware is associated with this consumable material. However, Hefei Kejing provides digital CoA delivery via secure PDF with embedded metadata (batch ID, assay date, instrument ID, analyst signature). Customers may integrate these documents into LIMS or ELN platforms using standard PDF parsing tools. Traceability is supported through unique alphanumeric batch codes laser-etched onto secondary packaging labels, enabling audit-ready linkage between physical inventory and analytical records.
Applications
- Thin-film synthesis of calcium-containing compounds: CaB₆ thermionic emitters, CaCu₅ hydrogen storage alloys, and layered nickelate heterostructures.
- Dopant source in oxide MBE growth of doped perovskite oxides (e.g., La₁₋ₓCaₓMnO₃) for colossal magnetoresistance studies.
- Reducing agent in solid-state synthesis of low-valent transition metal complexes and phosphide precursors.
- Calibration reference material for X-ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES) surface sensitivity validation.
- Target material for reactive magnetron sputtering of CaO, CaF₂, and CaSi₂ films used in anti-reflective and barrier layer applications.
FAQ
What is the recommended storage condition for long-term stability?
Store unopened packages under continuous vacuum or inert gas (Ar/N₂) at room temperature. Once opened, transfer material to a glovebox with O₂/H₂O < 0.1 ppm and use within 72 hours for 5N-grade material.
Can this calcium be used directly in an e-beam evaporator without pre-baking?
Pre-baking at 150–200 °C under high vacuum (≤1 × 10⁻⁵ mbar) for 30 minutes is strongly recommended to remove adsorbed moisture and volatile organics before high-power evaporation.
Is there a minimum order quantity (MOQ) for 5N purity grade?
Yes—the MOQ for 5N calcium blocks is 500 g; for granules, it is 1 kg. Smaller quantities are available for 3N5 and 4N grades.
Do you provide custom machining or alloying services?
Hefei Kejing offers OEM machining (e.g., cylindrical rods, washers, or wire drawing) and binary alloy preparation (e.g., Ca–Al, Ca–Si) under NDA; lead time and feasibility depend on purity grade and dimensional complexity.
How is purity validated for each batch?
Each production lot undergoes GDMS for metallic impurities and ICP-MS for non-metallic elements (O, C, N, H); full analytical reports are issued with every shipment.
