Zirconium Cups
Ultimate corrosion-resistant material selection: high-purity precision zirconium cup
Quartz, platinum or stainless steel containers are often limited by chemical attack or high cost in extreme chemical corrosion such as strong acid, strong alkali and high temperature molten salt analysis. Our High-Purity Zr702 Zirconium Cups/Zirconium Melting Crucibles are designed for chemical analysis, sample pretreatment, Sodium Peroxide melting, semiconductor coating, and high-temperature strong corrosion reactions. They are metal containers with both super corrosion resistance and high cost performance.
Manufacturing Process and Design Highlights
As shown in the physical picture, the appearance of this series of miniature zirconium cups presents a smooth and consistent metallic silver color, with excellent wall thickness uniformity and bottom flatness. We refuse to use coil tube machining with welds, but instead use high-purity Zr702 zirconium sheets/bars, molded in one go by Seamless Deep Drawing or precision CNC integral turning processes.
Seamless One-Piece Construction: The seamless molding process completely eliminates the hidden danger of intergranular corrosion in the heat affected zone (HAZ) and welds. Even under high temperature molten strong alkali or strong acid, the zirconium cup can also have structural integrity, prevent trace leakage of the sample, and ensure the repeatability and accuracy of the experimental analysis results.
Excellent resistance to sodium peroxide and strong alkali melting (Superior Alkali Resistance): Zirconium metal will quickly form a dense and extremely stable zirconia (ZrO ₂) passivation film on its surface in oxidizing and strong alkali molten salts. This makes the zirconium cup a standard container for melt analysis reagents such as sodium peroxide (Na ₂ O ₂) and sodium carbonate (Na ₂ CO ₂), and its service life far exceeds that of nickel crucibles or iron crucibles.
Ultrasonic Deep Degreasing and Chemical Pickling (Ultra-Clean Surface Finish): The finished product undergoes strict pickling and passivation (Pickled & Passivated) or mirror polishing treatment to remove all oils, impurities and mechanical processing stresses on the surface, meeting the stringent requirements for low pollution in semiconductor grade and trace element analysis.
Laboratory sample pretreatment and Geological mineral analysis (Geological & Mineral Sample Preparation): In the sample digestion of refractories, silicate minerals, and insoluble metal ores, the zirconium cup can withstand the molten attack of sodium peroxide up to 550 °C-650 °C, and the analysis results will not introduce common interfering elements such as copper, iron, and nickel.
Vacuum Evaporation and Electron Beam Source (Vacuum Evaporation & E-Beam Crucibles): The miniature zirconium cup can be used as the liner (Crucible Liners) or miniature evaporation pan of the electron beam evaporation coating machine, with extremely low gas release rate under high vacuum, and is widely used in the manufacture of optical thin films and semiconductor devices.
Chemical Processing Components: In addition to serving as sample containers, precision micro-zirconium cups can also be used as valve seals, fluid metering micro-cups, and corrosion-resistant isolation cavities in medical/chemical instruments.
Core technical parameters and specifications
Properties of Basic Physics and Mechanical Property
| Property | Mo ≥ 99.95% | Notes |
| Grade | UNS R60702 (Zr702) (Industrial Pure Zirconium) UNS R60705 (Zr705) (zirconium-niobium alloy to improve tensile strength) | Conforms to ASTM B551/ASTM B550 international standards |
| Purity | Zr + Hf ≥ 99.2% (Hf content is usually ≤ 4.5%, nuclear grade products Hf ≤ 0.01%) | Strictly control trace impurities such as iron, chromium, hydrogen, nitrogen, etc. |
| Density | 6.51 g/cm³ | Lighter than tantalum and molybdenum, with excellent strength-to-weight ratio |
| Melting Point | 1855 ℃ (3371 ℉) | Small thermal coefficient and good thermal shock resistance |
| Thermal Conductivity | 22 W/(m·K) | Exerts uniform heat transfer and accelerates the melting digestion process |
| Working Temp. | ≤ 500 °C in air; Up to 1400 °C under high vacuum/inert gas protection | Recommended melt temperature of sodium peroxide 500 °C- 650 °C |
Dimensions, Specifications and Machining Techniques
|
Item |
Specification |
| Dimension |
Miniature Zirconium Cup: OD 5 mm-30 mm (bulk miniature components as shown in the picture) Regular/large crucible: capacity 10 ml-500 ml + (straight wall or tapered on demand) |
| Wall Tolerance | 0.2 mm-2.0 mm (thin wall fast heat transfer, thick wall wear and ablation resistance) |
| Tolerance | OD/height tolerances for miniature parts: ± 0. 02 mm-± 0. 05 mm; Wall thickness uniformity ≤ ± 0. 015 mm |
| Processing | High Quality Cold Rolled Zirconium Plate/Bar ➔ Seamless Deep Drawing/CNC Micron Turning ➔ Ultrasonic Cleaning ➔ Vacuum Stress Relief Annealing |
| Surface Finish | Pickled & Passivated, As-Machined, Polished |
| Standards |
ASTM B551 (Standard Specification for Zirconium and Zirconium Alloy Strip, Sheet, and Plate) ASTM B550 (Standard Specification for Zirconium and Zirconium Alloy Bar and Wire) |
Quality Control and Delivery Guarantee
All factory zirconium cups have undergone rigorous size measurement, surface flawless microscopic inspection and chemical composition testing to ensure no cracks, no flashes, and no grease residue, and can be accompanied by a material inspection report (MTC) that complies with EN 10204 3.1 standard).
In terms of packaging, the micro-zirconium cup products are sealed with classified dust bags, the inner layer is inlaid with soft shock-proof foam, and the outer layer is packaged in hard cardboard boxes or fumigated wooden boxes to ensure that the products will not be deformed or produced in cross-border logistics. Surface scratches. We fully support sample proofing and large-scale flexible customization based on STEP/DWG/PDF drawings, providing you with fast-response global supply support.
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