Niobium Crucible
At Sizen Limited, we provide high-purity niobium crucibles for industries worldwide. Known for their exceptional heat resistance and deformation resistance, these crucibles are widely used in rare earth smelting, high-temperature sintering, chemical-resistant containers, and sputtering evaporation processes.
Made from 99.95% pure niobium, our crucibles ensure stability in extreme conditions. We manufacture them using two methods:
Forging Process: Machined from solid niobium bars for precise dimensions.
Pressed-Sintered Process: Deep-drawn from niobium sheets for seamless, high-strength construction.
With custom sizes available and a commitment to quality, Sizen Limited is your trusted partner for reliable niobium crucibles. Contact us today for a quote.
Our Niobium Crucible Specifications
Niobium crucible Information
- Material: Pure Niobium
- Standards: ASTM B394-98
- Grade: RO4200-1, RO4210-2
- Purity: 99% - 99.99%
- Diameter: 10-500 mm
- Density: 8.57 g/cm³ @20°C
- Melting Point: 2477 °C
- Boiling Point: 4742°C
- Thermal Conductivity: 0.537 W/cm/K @ 298.2 K
- Electrical Resistivity: 12.5 microhm-cm @ 0 °C
Niobium Crucible Dimensions and Tolerance
| livery Condition | Size(mm) | Tolerance(mm) | Surface Roughness | |||
|---|---|---|---|---|---|---|
| Diameter (mm) | High (mm) | Wall Thickness (mm) | Diameter (mm) | High (mm) | Ra | |
| Sintering | 10-500 | 10-600 | 8-20 | +/-5 | +/-5 | 1.6 |
| Forging | 10-130 | 10-200 | 8-20 | +/-1 | +/-2 | 1.6 |
Chemical Composition (%) of Niobium Crucibles
| Grade | Main Composition (%) | Impurity Content (%) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nb | Fe | Si | Ni | W | Mo | Ti | Ta | O | C | H | N | |
| Nb1 | Niobium (Nb) ≥ 99.95% | 0.004 | 0.004 | 0.002 | 0.005 | 0.005 | 0.002 | 0.05 | 0.012 | 0.0035 | 0.0012 | 0.003 |
| Nb2 | Niobium (Nb) ≥ 99.9% | 0.01 | 0.01 | 0.005 | 0.02 | 0.01 | 0.004 | 0.07 | 0.015 | 0.005 | 0.0015 | 0.008 |
Why Choose SIZEN as Your Niobium Sputtering Target Supplier?
High-Purity Niobium
99.95% pure niobium for superior performance.
Customized Solutions
Tailored for specific project needs.
Optimized Strength & Thickness
Engineered for durability while maintaining efficiency.
Superior Surface Finish
Smooth, high-quality finish ensures purity and performance.
Strict Quality Control
Direct manufacturer with strict quality control
5 MAIN REASONS TO CHOOSE US
1
High-Purity Niobium for Maximum Performance
We use 99.95% pure niobium, ensuring exceptional heat resistance, corrosion resistance, and longevity in demanding applications.
2
Custom Sizes & Specifications
Our crucibles are engineered with an ideal balance between wall thickness and durability, allowing them to withstand extreme temperatures without excessive weight or material waste.
3
Optimized Strength-to-Thickness Ratio
Our crucibles are engineered with an ideal balance between wall thickness and durability, allowing them to withstand extreme temperatures without excessive weight or material waste—maximizing efficiency and cost-effectiveness.
4
Superior Surface Finish
Every crucible undergoes comprehensive inspections for purity, strength, and surface finish, guaranteeing superior quality.
5
Strict Quality Control
Our streamlined production process and reliable logistics ensure your niobium bars are delivered on schedule, so you can keep your projects moving forward without unnecessary delays.
Unique Properties of Niobium Crucible
High-Temperature Resistance
With a melting point of 2,477°C (4,491°F), niobium crucibles can handle extreme heat without melting or deforming, making them ideal for metal smelting, crystal growth, and vacuum coating.
Excellent Corrosion Resistance
Niobium naturally forms a protective oxide layer, which shields it from acid corrosion and oxidation, ensuring long-lasting performance in harsh environments.
Strong and Durable
Niobium is a tough metal that resists cracking and deformation, even under high stress or rapid temperature changes.
Non-Contaminating Material
Its high purity and chemical stability prevent contamination, making it perfect for semiconductor production, scientific research, and high-purity material processing.
Lightweight but Sturdy
Niobium offers a great strength-to-weight ratio, making crucibles easy to handle while maintaining excellent durability.
Get a Quote for High-Purity Niobium Metal
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Manufacturing Process of Niobium Crucible
The process starts with extracting high-purity niobium from its ores using advanced chemical methods. This guarantees that the niobium we use is of the highest quality, ensuring reliable performance in demanding applications.
Once extracted, niobium is converted into fine metal powder, which serves as the base material for further processing. This step ensures uniform composition and high purity in the final crucible.
The niobium powder is compacted into billets and heated in a controlled environment in a process called sintering. This step fuses the powder particles into a solid structure, enhancing the material's strength and preparing it for the next stage.
The sintered billets are heated and processed through hot rolling or forging to form niobium sheets or bars. This step enhances strength, flexibility, and precision, ensuring the material is well-prepared for crucible fabrication.
We manufacture niobium crucibles using two distinct methods, depending on size and application requirements:
- Forged & Machined Crucibles – Niobium bars are precisely machined into crucibles, ensuring dense, high-strength structures with precise dimensions.
- Deep-Drawn Crucibles – Niobium sheets are pressed and stretched into seamless crucibles, offering lightweight construction with uniform thickness.
To improve thermal and mechanical properties, the crucibles undergo a controlled heat treatment process. This enhances their resistance to deformation and ensures long-term durability in extreme temperatures.
After forming, the crucibles are polished and treated to achieve a smooth, contamination-free surface. This step ensures purity and precision, making them suitable for high-tech and scientific applications.
Every niobium crucible goes through thorough testing to ensure high quality. We check purity, making sure the niobium content is 99.95% or higher. Each crucible is measured for accurate size and shape, and the surface is carefully inspected to remove any defects. With strict quality control, we guarantee durable, high-performance crucibles for all applications.
Once approved, the crucibles are carefully packaged to prevent damage during transportation, ensuring they arrive in perfect condition, ready for use.
Mixing Machine
Sintering Furnace
Die Forging
Annealing Furnace
Cold Rolling Mill
Straightening Machine
CNC Deep Hole Drilling Machine
Grinding Machine
Wire Drawing Equipment
Wire Cutting Machine
Handheld XRF Analyzer
Scanning Electron Microscope
Niobium Crucible Applications: Versatility Across Industries
Rare Earth and Metal Smelting
Niobium crucibles are ideal for rare earth refining and metal smelting, as they withstand extreme heat without reacting with the processed materials.
Semiconductor and Electronics
In the semiconductor industry, niobium crucibles are used for thin-film deposition and sputtering to produce high-purity coatings for microelectronics and optical devices.
Crystal Growth for Optics and Electronics
Niobium crucibles offer a contamination-free environment for growing synthetic crystals like sapphire, silicon carbide, and lithium niobate, which are used in semiconductors, optics, and laser technology.
Chemical Processing
Niobium's natural oxidation resistance makes its crucibles ideal for handling highly reactive chemicals, acid solutions, and corrosion-sensitive materials in laboratory and industrial settings.
Nuclear and Energy Research
Niobium crucibles are used in nuclear fuel processing and high-temperature experiments, where material purity and heat stability are crucial for research and energy applications.
High-Temperature Sintering
Used in the ceramic and powder metallurgy industries, niobium crucibles help sinter advanced ceramics, hard metals, and specialty powders at extreme temperatures.
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