Molybdenum Crucible
- Molybdenum Melting Point: 2623°C (4753°F)
- Molybdenum Density: 10.22 g/cm³
- Diameter: 10 – 700mm
- Height: 25 – 900mm
- Wall Thickness: 3-30mm
Molybdenum Crucible
Golden Sunbird Metals manufactures premium high-purity molybdenum crucibles (Mo ≥99.95%) known for outstanding thermal stability, superior creep resistance, and excellent thermal shock performance. Ideal for sapphire & laser crystal growth, rare-earth metal smelting, vacuum coating, high-temperature sintering, and precision laboratory evaporation.
We offer complete customization — from micro lab crucibles to large industrial vessels — using four advanced manufacturing processes: sintered, forged, spun (flow-formed), or machined/welded. Any shape (round, conical, rectangular, stepped, with ribs, etc.), ultra-tight tolerances (±0.1 mm), and surface finishes as fine as Ra 0.2 μm are possible.
Advantages
- Exceptional thermal stability up to 2100°C+ continuous operation.
- Highest creep resistance for long-term high-temperature use.
- Purity ≥99.95% with controlled trace elements for semiconductor/optical-grade applications.
- Four process options to match your exact needs: cost-effective large sizes (sintered), extreme conditions (forged), thin-wall lightweight (spun), or complex geometries (machined/welded).
- Flexible surface finishes: mirror polish, matte, or coated.
Technical Specifications
- Melting Point: 2623°C (4753°F)
- Density: 10.22 g/cm³ (process-dependent)
- Outer Diameter: 10–800 mm (larger sizes available)
- Height: 25–1000 mm
- Wall Thickness: 0.15–50 mm
- Tolerances: ±0.1 mm (precision) to ±3.0 mm (industrial)
- Surface Roughness: Ra 0.2–0.8 μm
Standard Size Ranges (100% Customizable)
| Category | Outer Diameter (OD) | Height | Wall Thickness | Typical Tolerances (OD / Wall) | Typical Applications |
| Miniature / Precision | Φ3 – 100 mm | 10 – 200 mm | 0.15 – 10 mm | ±0.1–1.5 mm / ±0.8 mm | Lab research, MBE sources, high-precision evaporation |
| Medium Industrial | Φ100 – 400 mm | 50 – 600 mm | 1 – 30 mm | ±2.0 mm / ±1.3 mm | Single-crystal growth, rare-earth & alloy melting |
| Large Custom | Φ400 – 800 mm* | 200 – 1000 mm | 1 – 50 mm | ±3.0 mm / ±2.5 mm | Large sapphire crystals, industrial furnaces |
*Larger diameters available upon request. All dimensions can be fully tailored.
Manufacturing Process Comparison
| Process | Density (g/cm³) | Typical OD (mm) | Wall Thickness (mm) | Key Features & Best For |
| Sintered | ≥9.8 | 10 – 500 | 1 – 30 | Cost-effective for very large sizes |
| Forged | ≥10.2 | 10 – 500 | 1 – 30 | Highest density & thermal shock resistance – extreme environments |
| Spun (Flow-formed) | ≥10.1 | 200 – 800 | 1 – 8 | Thin-wall, lightweight, excellent thermal conductivity |
| Machined / Welded | ≥10.2 | 3 – 600 | 0.15 – 50 | Unlimited shape complexity, tightest tolerances |
Selection
- Charge volume → determines inner diameter and height
- Furnace fit → allow 5–10 mm gap between crucible OD and heater
- Crystal growth → tall design (H ≥ 2×OD) for stable temperature gradient
- Fast experiments → short/wide design (H ≤ OD)
- Budget priority → sintered process for large sizes
- Maximum performance → forged or spun process
Applications
- Sapphire and laser crystal growth.
- Rare-earth metal and alloy smelting.
- Vacuum coating (optical & semiconductor).
- High-temperature sintering furnaces.
- Laboratory precision evaporation sources & MBE.
