Spun Molybdenum Crucibles
AllWhereCrucible manufactures seamless spun molybdenum crucibles designed specifically for extreme thermal environments, including vacuum sintering, sapphire crystal growth, and high-temperature laboratory research.
Produced from high-purity molybdenum sheets via advanced rotary metal spinning, our crucibles completely eliminate the structural weak points inherent in welded designs. This ensures exceptional dimensional stability, superior thermal shock resistance, and reliable performance at operating temperatures up to 2000 degrees C and above under controlled atmospheres.
- Product Introduction
High-Density Spun Molybdenum Crucibles for High-Temperature Processing
AllWhereCrucible manufactures seamless spun molybdenum crucibles designed specifically for extreme thermal environments, including vacuum sintering, sapphire crystal growth, and high-temperature laboratory research.
Produced from high-purity molybdenum sheets via advanced rotary metal spinning, our crucibles completely eliminate the structural weak points inherent in welded designs. This ensures exceptional dimensional stability, superior thermal shock resistance, and reliable performance at operating temperatures up to 2000 degrees C and above under controlled atmospheres.
Technical Specifications
|
Parameter |
Specification Details |
|
Product Name |
Spun Molybdenum Crucible |
|
Material Grade |
Unalloyed Molybdenum (Purified Sheet) |
|
Material Purity |
>= 99.95% Mo |
|
Manufacturing Process |
Precision Rotary Metal Spinning (Seamless) |
|
Melting Point |
2623 degrees C |
|
Density |
Approx. 10.2 g/cm3 |
|
Thermal Expansion Coefficient |
Approx. 5.1 x 10^-6 / K (at 20 degrees C to 1000 degrees C) |
|
Surface Finish |
As-spun, Chemically Cleaned, or Mirror Polished (Ra values available upon request) |
|
Working Atmosphere |
Vacuum, Hydrogen (H2), or Inert Gas (Ar / He) Only |
Crucial Operating Note: Molybdenum rapidly oxidizes in air at temperatures above 400 degrees C. These crucibles must be operated strictly within vacuum or inert/reducing protective gas environments.
Key Performance Advantages
Seamless Structure via Rotary Spinning
• The Problem: Conventional welded crucibles contain heat-affected zones (HAZ) along the seams that frequently crack and fail under continuous thermal cycling.
• Our Solution: Formed seamlessly from a single flat molybdenum sheet rotated against a precision mandrel.
• The Benefit: Eliminates weld joints entirely, prevents localized thermal stress concentrations, minimizes deformation during aggressive heat-up/cool-down cycles, and significantly extends operational lifespan in industrial vacuum furnaces.
High-Purity Material for Strict Contamination Control
• The Material: Fabricated from >= 99.95% pure molybdenum raw sheets with ultra-low interstitial gas content (O, N, C).
• The Benefit: Minimizes trace element migration into sensitive melts, safeguarding high-purity materials in advanced semiconductor processing, rare earth smelting, and optical coating applications.
Dimensional Stability under Extreme Thermal Cycling
• The Property: Leverages molybdenum's low thermal expansion coefficient (approx. 5.1 x 10^-6 / K) and high thermal conductivity.
•The Benefit: Retains wall thickness uniformity and precise geometric shape during rapid thermal transients, preventing costly fixture jamming inside furnace hot zones.
Manufacturing & Quality Control Process
AllWhereCrucible implements rigorous quality control protocols at every stage of production to guarantee zero-defect delivery:
Raw Material Verification: Incoming molybdenum sheets are strictly inspected for ultrasonic internal defects, thickness uniformity, and chemical composition via advanced spectrometry.
Precision Spinning: Blanks are incrementally formed on a heavy-duty lathe-mounted mandrel. This optimized cold/warm spinning process maintains fibrous grain orientation and supreme structural continuity.
Stress Relief Annealing: Controlled vacuum heat treatment completely relieves internal working stresses induced during the forming process.
Dimensional Inspection: Every production batch is verified using calibrated digital calipers, depth micrometers, and height gauges to ensure wall thickness consistency and inner/outer diameter tolerances align perfectly with technical blueprints.
Cleaning & Packaging: Crucibles undergo thorough ultrasonic cleaning to strip drawing lubricants and machining residues, followed by individual anti-oxidation wrapping and vacuum-sealed export packaging.
Primary Industrial Applications
Sapphire Crystal Growth: Serving as high-reliability growth crucibles in high-temperature crystal pulling systems (KY/CZ methods).
Vacuum Evaporation & Melting: Ideal for vaporizing high-purity metals (aluminum, silver, gold, copper) and melting refractory compounds.
Semiconductor Sintering: Applied in electronic component manufacturing furnaces requiring clean, low-outgassing refractory containers.
Laboratory Research: Widely utilized in high-temperature tube and muffle furnaces for advanced material testing under protective atmospheres.
Customization & Ordering Parameters
AllWhereCrucible fully supports OEM/ODM production tailored to your exact blueprints or technical specifications. When requesting a quote from our engineering team, please provide the following details to accelerate your response:
Dimensions: Outer Diameter (OD), Height (H), and Wall Thickness (T).
Tolerances: Specific machining, surface finish (Ra), or assembly clearance requirements.
Quantity: Prototype batch or ongoing bulk volume orders.
Application Environment: Maximum operating temperature and furnace atmosphere (Vacuum, H2, or Ar).
FAQ
Q: What is a spun molybdenum crucible?
A: A spun molybdenum crucible is a high-temperature container manufactured by cold or warm forming high-purity molybdenum sheets through a precision metal spinning process. Unlike welded counterparts, spun crucibles feature a completely seamless structure that maximizes reliability during harsh thermal cycling.
Q: What purity of molybdenum do you use?
A: Our standard spun molybdenum crucibles are manufactured from molybdenum with a purity of 99.95% or higher. Even higher purity grades can be custom-sourced and supplied according to specialized application requirements.
Q: What temperatures can these crucibles withstand?
A: Molybdenum features a high melting point of approximately 2623 degrees C. The practical operating temperature depends on your specific furnace atmosphere, heating method, and load conditions. Because molybdenum oxidizes rapidly in air above 400 degrees C, operations must be restricted to vacuum, hydrogen, or inert gas environments.
Q: What is the difference between spun and welded molybdenum crucibles?
A: Spun Crucibles: Completely seamless, offer superior structural consistency, and eliminate weak points/HAZ cracking risks during aggressive heating cycles.
Welded Crucibles: Feature welded seams that require intensive X-ray/non-destructive testing and often represent structural vulnerability under high thermal stress.
Q: Can you manufacture customized sizes and shapes?
A: Yes. We specialize in custom manufacturing tailored precisely to your technical drawings, unique furnace dimensions, and specific diameter-to-height or wall thickness requirements.
Hot Tags: spun molybdenum crucibles, China spun molybdenum crucibles manufacturers, suppliers, factory
