Zero-Porosity Curved Alumina for Reactive Melts & Clean Pouring
Alumina Curved Crucibles
Stop dealing with thermal stress fractures at sharp corners and contaminated melts. Engineered with a smooth arc profile, our slip-cast curved alumina crucibles provide optimal thermal distribution and seamless pouring for reactive fluids. Delivering 0% water absorption and extreme lead/acid resistance up to 1750°C, you secure premium metallurgical carriers directly from the manufacturer—bypassing all distributor markups.
Key Features of Curved Crucibles
Zero Slag Trapping & 100% Pouring
90-degree corners in standard crucibles trap expensive alloys and create cleaning nightmares. Our precision-cast arc bottom eliminates dead zones, ensuring a seamless, gravity-assisted pour and 100% material recovery for high-value melts.
Thermal Stress Distribution
Sharp structural angles are the primary cause of thermal shock fractures. The smooth U-shape geometry naturally disperses thermal expansion stress, significantly reducing the risk of catastrophic bottom cracking during demanding cooling cycles.
Up to 99.95% Purity Control
Select from reliable 99.1%-99.4% standard alumina or upgrade to ultra-pure 99.95% grades. By using top-tier imported powders, we guarantee ppm-level contamination control without any carbon residue during extreme heating cycles.
1750°C Factory-Direct Economics
Engineered for long-term continuous use at 1700°C with tested endurance up to 1750°C. Stop paying massive distributor markups and secure heavy-duty metallurgical labware directly from the manufacturing source.
Factory Inventory & Specs
Standard Dimensions & Slip-Cast Tolerances
We stock standard curved sizes for immediate lab dispatch (1-2 days). Please note: To achieve our signature 0% water absorption, our traditional slip-casting process involves natural firing shrinkage. This results in standard industrial tolerances (typically ±1-3mm).
| Capacity (ml) | Top (Outer) Diameter (mm) | Height (mm) | Wall Thickness (mm) | Notes |
|---|---|---|---|---|
| 10 | 28 | 34 | 2-2.3 | - |
| 20 | 35 | 41 | 2.3 | - |
| 30 | 39 | 47 | 2.6 | - |
| 50 | 50 | 60 | 3-3.5 | - |
| 100 | 58 | 70 | 3.8 | - |
| 150 | 68 | 78 | 3.8 | - |
| 200 | 72 | 88 | 4 | - |
| 300 | 84 | 108 | 4.3 | - |
| 350 | 89 | 102 | 4.3 | - |
| 500 | 100 | 118 | 4.5-5 | - |
| 750 | 110 | 130 | 4.5-5 | - |
| 1000 | 119 | 150 | 5 | - |
| 1300 | 129 | 150 | 5-5.5 | - |
| 1500 | 140 | 177 | 5.5 | - |
| 2000 | 163 | 155 | 6.5 | - |
| 3300 | 220 | 155 | 7-7.5 | - |
Customization
Custom Arc & U-Shape Prototyping
Bypass massive US distributor mold fees. We manufacture non-standard arc sizes and heavy-duty labware directly from your CAD/PDF drawings.
- Heavy-Wall Slip-Casting: We cast custom radii, diameters, and extreme wall thicknesses (up to 12mm) to maximize your crucible's thermal lifespan.
- Ultra-Purity Options: Purity grades up to 99.95% to ensure zero cross-contamination for your specific reactive melts.
- Refundable Tooling: Custom mold fees are transparently priced (typically $200 - $400) and are fully refunded on production batch orders (500+ pcs).
Related Alumina Products
Alumina Cylindrical Crucibles
Alumina Rectangular & Square Crucibles (Saggars)
