Product Overview
Coraynic Technology Limited supplies high-performance tungsten (W) and molybdenum (Mo) crucibles designed for demanding sapphire single crystal growth applications.
Sapphire crystal growth requires crucible materials capable of maintaining structural stability under prolonged exposure to extremely high temperatures. Tungsten and molybdenum are widely selected for these environments because of their high melting points, low vapor pressure, thermal stability, and resistance to deformation at elevated temperatures.
Our crucibles are manufactured from high-quality refractory metal materials and can be produced according to furnace configuration, crystal growth method, crucible dimensions, wall thickness, and customer drawings.
As part of our refractory metal product portfolio, these crucibles complement our existing expertise in advanced ceramics, metallized ceramic components, and high-performance materials.
Key Applications
Tungsten and molybdenum crucibles are critical components in sapphire crystal growth furnaces. Sapphire produced using these processes is widely used for:
Applicable Crystal Growth Methods
Kyropoulos (KY) Method
The Kyropoulos method is widely used for producing large-diameter sapphire single crystals. Tungsten crucibles are commonly selected for KY growth furnaces because of their excellent high-temperature stability and mechanical strength.
Heat Exchanger Method (HEM)
HEM is another established method for sapphire crystal growth. Molybdenum crucibles are commonly used in suitable HEM furnace configurations because of their thermal and mechanical characteristics at elevated temperatures.
Tungsten & Molybdenum Crucible Specifications
We provide customized crucibles according to furnace design and customer requirements.
| Parameter | Tungsten (W) Crucible | Molybdenum (Mo) Crucible |
| Typical Application | Sapphire growth, commonly KY method | Sapphire growth, commonly HEM |
| Density | ≥ 18.3 g/cm³ | ≥ 9.90 g/cm³ |
| Maximum Diameter | Up to 600 mm | Up to 600 mm or customized |
| Purity | High purity, customizable | High purity, customizable |
| Manufacturing | Sintering, forging, machining | Sintering, forging, machining |
| Design | Customized according to drawing | Customized according to drawing |
Actual material grade, density, dimensions, wall thickness, and manufacturing process can be customized according to furnace design and application requirements.
For large sapphire growth furnaces, material density, dimensional accuracy, wall thickness, surface condition, and structural integrity are important factors affecting crucible performance and service life.
Key Performance Advantages
High-Temperature Stability
Tungsten and molybdenum have exceptionally high melting points and maintain useful mechanical properties at elevated temperatures. This makes them suitable for the prolonged high-temperature conditions encountered during sapphire crystal growth.
Low Vapor Pressure
Their low vapor pressure at high temperatures helps minimize material evaporation and potential contamination within the furnace environment.
Structural Strength & Dimensional Stability
High-density refractory metal materials provide good resistance to deformation under high-temperature operating conditions. Proper material selection and manufacturing control help maintain crucible geometry throughout repeated thermal cycles.
High-Purity Materials
High-purity refractory metal materials can be supplied for applications where contamination control is critical. Material purity can be specified according to customer requirements.
Custom Furnace-Compatible Designs
Crucibles are manufactured according to customer drawings and furnace specifications. Customization can include:
Manufacturing & Quality Control
Our refractory metal manufacturing resources support different processing routes, including powder metallurgy, sintering, forging, machining, and precision finishing, depending on the material and crucible design.
Each crucible can be inspected for critical characteristics such as:
Quality control is carried out according to agreed technical specifications to help ensure reliable performance during demanding crystal growth processes.
Related Tungsten & Molybdenum Products
For customers sourcing components for complete high-temperature furnace systems, we can also provide complementary refractory metal products, including:
This allows Coraynic to support customers not only with crucibles but also with complementary refractory metal components used in high-temperature vacuum furnace systems.
Custom Manufacturing & Ordering
We support OEM and customized orders based on technical drawings, samples, furnace specifications, or application requirements.
MOQ: Negotiable according to product specifications and order quantity.
Lead Time: Confirmed after reviewing drawings, material requirements, production process, and quantity.
Packaging: Protective export packaging and reinforced wooden cases are available for safe international transportation.
For customized crucibles, please provide the drawing, required material, purity, dimensions, furnace type, and intended crystal growth process where available.
Request a Custom Tungsten or Molybdenum Crucible
Looking for a refractory metal crucible for your sapphire crystal growth furnace?
Send us your drawing or technical specifications. Our team can review the requirements and recommend a suitable tungsten or molybdenum crucible solution based on your furnace configuration and application.
Contact Coraynic Technology Limited for a quotation and technical discussion.
