Niobium Crucible
The Niobium Crucible supplied by China Super Tech Co., Ltd. is produced through electron beam vacuum melting of raw materials. It is formed through sintering, forging and precision turning processes, with a purity of over 99.95%. It can operate stably in a 1500℃ high-temperature vacuum environment for a long time. The product has extremely strong corrosion resistance and chemical inertness, and does not react with most molten metals. It is specially designed for high-demand scenarios such as synthetic diamonds, semiconductors, and aerospace, and can be customized in sizes ranging from 5ml to 1000ml.
- Product Introduction
Characteristics
1.Under high-temperature conditions, the structure is stable and has strong anti-deformation ability.
The Niobium Crucible produced by China Super Tech Co., Ltd. is made from niobium material with a purity of up to 99.95%. Thanks to the high melting point of niobium (2468℃) and its low thermal expansion coefficient, it can maintain structural integrity even during repeated high-temperature cycles, effectively avoiding the common deformation and collapse problems of conventional crucibles during long-term heating.
2. Extremely low vapor pressure, effectively preventing smelting pollution at the source
Nickel has an extremely low vapor pressure under vacuum conditions, which means that during high-temperature smelting, the crucible itself hardly evaporates or releases metal ions, minimizing cross-contamination of the molten material. For processes such as high-purity alloy production and crystal growth that have zero tolerance for impurities, this characteristic directly determines the quality of the final product.
3. Controlled forming process, uniform wall thickness, excellent thermal shock resistance
Compared with the internal stress concentration problem that may remain in traditional direct machining solutions, China Super Tech adopts controlled forming combined with vacuum stress relief annealing treatment. This enables the grain distribution and wall thickness consistency to be significantly better than conventional products, thereby greatly reducing the risk of thermal cracking and effectively extending the service life of the crucible.
4. Excellent compatibility with vacuum and inert atmospheres
Nickel exhibits outstanding chemical stability in vacuum furnaces and argon protection systems, capable of withstanding multiple heating-cooling cycles without significant performance degradation. This helps customers significantly reduce operating costs resulting from frequent replacement of consumables.
5. CNC precision processing with controllable tolerance and high process repeatability
China Super Tech employs advanced CNC processing combined with full-scale inspection to ensure strict compliance with geometric accuracy and dimensional tolerance. The uniform wall thickness results in a more stable thermal field distribution, enabling higher process consistency and repeatability, whether for melting or crystal growth.
Application
1.Vacuum Melting of High-Purity Metals and Alloys
In vacuum induction melting and electron beam melting processes, the control of contamination sources within the furnace chamber is of utmost importance. The Niobium Crucible, with its extremely low gas emission characteristics, effectively reduces the sources of impurities within the furnace chamber, and is suitable for the melting and processing of special alloys, high-temperature alloys, and research-grade metals.
2.Semiconductor-grade material preparation
Semiconductor materials have extremely high requirements for the cleanliness of the processing environment. Even a small amount of metal contamination can lead to the failure of electrical performance. China Super Tech's Niobium Crucible, with its dual advantages of high purity and low vapor pressure, provides reliable container protection for the preparation of electronic-grade compounds and special semiconductor materials.
3.Production of rare earth and new functional materials
The high-temperature treatment of rare earth compounds is usually carried out under strictly controlled atmospheres. The Nb crucible, with its excellent thermal stability and chemical compatibility, ensures the consistency of product batches while preventing unexpected reactions between the container and the material.
4.Single crystal growth system
Monocrystalline growth requires strict requirements for both thermal field stability and container cleanliness. The niobium crucible structure provided by China Super Tech Co., Ltd. is uniform in shape and precise in size, capable of supporting a stable temperature field environment, and helping to improve the quality of crystal growth.
5.Scientific research experiments and new material development
When universities, research institutions and enterprise R&D laboratories are exploring new materials, they often encounter working conditions that exceed the temperature tolerance limits of ceramic or stainless steel containers. The Niobium Crucible can operate stably at temperatures above 1500℃ and is an ideal consumable choice for such cutting-edge research.
Customized service
Our customization is not simply following the design; instead, we take full control of the entire process from material selection to the final product.
1.The size can be freely determined.
The diameter ranges from 10mm to 500mm, the height ranges from 10mm to 600mm, and the capacity ranges from 5ml to 1000ml. We can produce it based on your drawings, or you can provide samples for customization.
2. Short delivery time, goods available immediately
We have our own production lines for sintering, forging and machining. There is no need to wait for outsourcing. Customized products will be delivered within 10 days. Regular specifications are available in stock and can be delivered upon placing an order.
3. High precision, unlikely to crack
The dimensional tolerance is controlled within ±5mm, and the wall thickness is evenly distributed. Why is this important? Because uneven wall thickness can lead to concentrated thermal stress, and it will crack when heated. We have solved this problem through the manufacturing process.
4. The origin of each batch of goods can be traced.
Each batch of products comes with a material composition report, including density and impurity test data, all in accordance with ASTM B394/B395 standards. If there is a problem, there is no need to guess; it can be directly traced back to the specific process step.
5. Complete certifications, low threshold
Produced in accordance with the ISO9001:2015 standard, supporting provided drawings and samples. The minimum order quantity is only 5kg.
The biggest difference between us and those suppliers who only engage in trade is that we control the entire process from smelting to finished products ourselves. In case of any quality issues, we can directly pinpoint the cause to a specific stage. This is our true advantage.
Specifications
| Parameter | Specification |
| Material | Pure Niobium (Nb) |
| Purity | 99.9% – 99.95% |
| Density | 8.57 g/cm³ |
| Melting Point | 2,477°C |
| Operating Environment | Vacuum, Argon, Inert Gas |
| Manufacturing Process | Forging, Deep Drawing, CNC Machining, Vacuum Annealing |
| Outer Diameter | 10 mm – 500 mm |
| Height | 10 mm – 600 mm |
| Wall Thickness | 0.5 mm – 10 mm |
| Surface Finish | Machined, Polished, Chemical Cleaned |
| Shape Options | Cylindrical, Conical, Square, Custom Shapes |
| Dimensional Tolerance | As Drawing Requirement |
| Customization | Available |
| Quality Inspection | Chemical Analysis, Dimensional Inspection, Surface Inspection |
FAQ
Why choose niobium crucibles instead of tantalum crucibles?
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Both have similar corrosion resistance, but the cost of niobium is only 1/5 to 1/10 of that of tantalum. In scenarios where the extreme acid resistance of tantalum is not required (such as synthetic diamond production, rare earth smelting), niobium crucibles are a more economical choice, and their performance is fully sufficient.
Can your products be tested by spectroscopy?
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Yes. Each batch of products comes with a material composition report, including the measured values of elements such as Nb, Ta, Fe, and Si. Customers can also send their samples for retesting on their own.
How soon can the goods be delivered?
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For regular specifications, they are in stock and can be shipped upon order. For custom items, from confirming the drawings to shipment, it takes no more than 10 working days.
Under what conditions can it be used?
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It is recommended to use it in a vacuum (≤ 10⁻³ Pa) or under the protection of inert gases such as argon. Using it in the air at high temperatures will cause surface oxidation and affect the lifespan.
What's the difference between you and the traders?
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We have our own electron beam melting and sintering forging production lines. From raw materials to finished products, the entire process is controllable. It's not just a simple transfer of goods. In case of any quality issues, we can directly pinpoint the specific process and take full responsibility.
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