XTL sintyron PBN Pyrolytic Boron Nitride vgf Crucible

VGF crucible is a kind of crucibles used in VGF Technology. Vertical gradient freeze method (VGF) is the most popular technology at present. It is the good choice for the growth of single crystals in the microelectronics and semiconductor industry.

Properties

• High Temperature Resistance: PBN VGF crucibles can endure extremely high temperatures, often reaching up to 1800°C or even more. This remarkable property allows them to remain stable in the high-temperature environment of the VGF process, where the materials need to be heated to high temperatures for melting and subsequent crystal growth.
• Superior Chemical Inertness: They exhibit excellent chemical stability and are highly resistant to corrosion by various chemicals and molten substances used in the VGF process. This characteristic is vital as it ensures that the crucible does not react with the materials being processed, thereby maintaining the purity and quality of the grown single crystals.
• Low Thermal Expansion Coefficient: PBN VGF crucibles have a relatively low thermal expansion coefficient. This enables them to withstand rapid and significant temperature changes during the VGF process without cracking or deforming easily, thus safeguarding the integrity of the crucible and facilitating stable crystal growth.
• High Purity: The material of PBN VGF crucibles typically has a high purity level, often exceeding 99.99%. This high purity is of utmost importance as it minimizes the introduction of impurities into the crystal growth process, resulting in single crystals with outstanding electrical and optical properties.
• Good Thermal Conductivity: They possess good thermal conductivity, which is beneficial in the VGF process. It helps to achieve a more uniform temperature distribution within the crucible, facilitating better control of the crystal growth process and improving the quality and homogeneity of the grown crystals.

Manufacturing Process

• Chemical Vapor Deposition (CVD): The production of PBN VGF crucibles mainly relies on the CVD process. In this method, gaseous precursors like boron trichloride (BCl₃) and ammonia (NH₃) are introduced into a reaction chamber. Under precisely controlled high-temperature and low-pressure conditions, a chemical reaction takes place, leading to the deposition of boron nitride on a pre-shaped substrate or mold. This process allows for precise control over the thickness and quality of the PBN layer, ensuring the uniformity and reliability of the crucible.
• Precision Machining: After the CVD deposition, the crucibles usually undergo precision machining processes to achieve the required dimensions and surface finish. This is crucial to ensure that the crucibles fit accurately into the VGF equipment and provide an ideal surface for crystal nucleation and growth.

Applications

• Semiconductor Industry: PBN VGF crucibles are widely used in the growth of various semiconductor single crystals, such as silicon carbide (SiC), gallium arsenide (GaAs), and indium phosphide (InP). In the VGF process, the crucible holds the molten semiconductor material, and as the temperature gradient is carefully controlled, single crystals with high crystallographic quality and large diameters can be grown. These single crystals are the foundation for manufacturing high-performance electronic devices, including power transistors, integrated circuits, and optoelectronic components.
• Optoelectronic Device Fabrication: In the production of optoelectronic devices like light-emitting diodes (LEDs), laser diodes, and photodetectors, PBN VGF crucibles play a vital role. The high-quality single crystals grown in these crucibles are used to fabricate the active layers of optoelectronic devices, ensuring their excellent optical and electrical performance, which is essential for applications in lighting, telecommunications, and display technologies.
• Research and Development: PBN VGF crucibles are also indispensable tools in scientific research related to materials science and crystal growth. They offer a reliable and controllable environment for studying the growth mechanisms of different crystals, exploring new semiconductor materials with unique properties, and developing advanced crystal growth techniques.

Advantages in the VGF Process

• Enhanced Crystal Quality: The use of PBN VGF crucibles significantly reduces the occurrence of defects in single crystals, such as dislocations, twins, and impurities. This results in higher-quality crystals with improved electrical and optical characteristics, which is crucial for the performance and reliability of semiconductor and optoelectronic devices.
• Precise Growth Control: The excellent thermal and chemical properties of PBN crucibles contribute to precise control of the VGF process. They can maintain a stable and uniform temperature gradient, allowing for more accurate control of the crystal growth rate and direction. This leads to better reproducibility and yield in the production of high-quality single crystals.
• Long Service Life: Compared to other types of crucibles, PBN VGF crucibles have a relatively long service life. Their high temperature resistance, chemical stability, and mechanical strength enable them to be used repeatedly in multiple VGF growth cycles, reducing the overall cost of crystal growth and improving production efficiency.

Product details

Conclusion

• PBN Crucibles are ideal for high-purity, high-temperature applications in industries like semiconductors, optoelectronics, and aerospace, where chemical inertness and thermal stability are critical.

• Alumina Crucibles are more suitable for general-purpose applications in metallurgy, ceramics, and laboratory settings, where cost and mechanical strength are more important than extreme purity and thermal performance.

Choosing between the two depends on the specific requirements of your application, including temperature, chemical environment, purity, and budget.

The higher cost of PBN crucibles is justified by their superior material properties, complex manufacturing process, and suitability for high-performance applications. In contrast, alumina crucibles are more affordable due to their simpler production process and broader, less demanding applications. For industries requiring extreme purity, thermal stability, and chemical resistance, PBN crucibles are often the only viable option despite their higher price 

Why choose us

    Liling Xingtailong Special Ceramic Co., Ltd Founded in 1997, is an independent R&D and manufacturing enterprise integrating scientific research and production. "Superior quality, preferential price" is our business purpose. The company mainly produces PBN and BN products. Over the years, the company has been deeply involved in development, and has successively obtained (ISO9001, Alibaba's ten-year-old high-quality supplier, China Manufacturing Network certified supplier, high-tech enterprise certification, gold product enterprise certification, ceramic industry AAA credit unit，product ROHS testing certification, and 6 invention patents.      The company has always adhered to the goal of quality survival, innovative development, honest brand, and meticulous and thoughtful after-sales service. Region, product quality and service are highly recognized by customers.   Striving to be Stronger, hard work and progress. The company initiates a professional responsible person model, continuously improves and innovates, and strives to provide each customer with better and more efficient services.   With strong strength, reasonable price and professional service, We has established long-term cooperative relations with large enterprises at home and abroad. "Excellent quality, preferential price" is our business purpose.   We sincerely look forward to cooperating with more domestic and foreign customers and developing together.

Customer feedback

FAQ

FAQ

Why us?
* Professional manufacturer since 1997.
* Strict quality control on production process and tolerance.
* Free samples available
* Customized production based on your drawing or specification
* On-time delivery and reliable support and service
* Inventory available for quick shipment
* We keep confidentiality of all the drawings and business information between us.
Are you a trading company or a manufacturer?
* We are a manufaturer. 
Can you provide the free samples?
* Yes,we can offer free sample if we have it in stock,but the courier fee is to be collected.
Do you accept customized production based our specification?
* Yes,we offer OEM and ODM service. Just send us your drawing if you have it. If you don’t have a drawing, just tell us your idea, we will work out the drawing for you.

What's the delivery time?
* 7 working days for standard products 30 days for customized products. 
What is the MOQ?
* No limit to the quantity. We can offer the best proposal and solutions according to your condition.
What is the payment terms you accept?
* T/T,LC,Western Union,moneygram are acceptable.
How to deal with the faulty?
* Firstly, Our product are produced in strict quality control system and the defective rate will be less than 2%.
If there are problems with the product, we will provide free replacement.

Tags：Ashes Assay Crucible, Clay Crucible, Gold Assay Crucible, Graphite Crucible, Pyrolytic Boron Nitride Crucible