Molybdenum Crucible (Mo Crucible)

• High melting point: Molybdenum melts at approximately 2,623°C.

• High-temperature stability: Suitable for selected vacuum and controlled-atmosphere thermal processes.

• Good thermal conductivity: Supports efficient heat transfer during processing.

• Low thermal expansion: Helps limit dimensional changes during heating.

• High-purity material: Molybdenum purity of 99.95% or higher may be available.

• Custom configurations: Round, tapered, oval, and drawing-specific designs may be sourced.

Property	Typical Specification
Product Name	Molybdenum Crucible
Chemical Symbol	Mo
Chemical Formula	Mo
CAS Number	7439-98-7
Molecular Weight	95.95 g/mol
Appearance	Silvery-gray metallic
Purity	99.95%–99.99%, subject to availability
Density	Approximately 10.2 g/cm³ for dense molybdenum
Melting Point	Approximately 2,623°C
Thermal Conductivity	Approximately 138 W/m·K at room temperature
Thermal Expansion Coefficient	Approximately 4.8 × 10⁻⁶/K near room temperature
Manufacturing Methods	Sintered, forged, machined, spun, stamped, or welded
Available Materials	Pure molybdenum; TZM or other molybdenum alloys may be available
Dimensions	Custom outside diameter, height, wall thickness, and bottom thickness
Applications	Vacuum furnaces, crystal growth, rare-earth processing, thermal evaporation, high-temperature materials processing

• High-Purity Molybdenum Crucible: For vacuum and controlled-atmosphere thermal processing.

• Sintered Molybdenum Crucible: Produced using powder metallurgy for a range of industrial and high-temperature applications.

• Forged Molybdenum Crucible: Dense material option for applications requiring specific mechanical and dimensional characteristics.

• Machined Molybdenum Crucible: Custom geometry and dimensional requirements.

• TZM Alloy Crucible: Molybdenum alloy containing titanium and zirconium for applications where enhanced high-temperature mechanical performance is needed.

• Custom-Designed Crucible: Available for evaluation based on customer drawings, operating conditions, and material requirements.

1. What is a molybdenum crucible used for?

Molybdenum crucibles are used in high-temperature material processing, rare-earth metal melting, sapphire crystal growth, vacuum furnace operations, thermal evaporation, and specialized research applications.

2. What is the maximum operating temperature of a molybdenum crucible?

The suitable operating temperature depends on the crucible design, atmosphere, load, and process conditions. Some supplier specifications cite operating ranges around 1,100–1,700°C, with certain designs rated higher under suitable conditions. The melting point of molybdenum is not its recommended operating temperature.

3. What purity levels are available?

High-purity options such as 99.95% and 99.99% molybdenum may be available. The required purity and impurity limits should be specified when requesting a quotation.

4. Can molybdenum crucibles be manufactured to custom dimensions?

Custom sizes may be sourced according to outside diameter, inside diameter, height, wall thickness, bottom thickness, tolerances, and drawing requirements.

5. What is the difference between a pure molybdenum and a TZM crucible?

Pure molybdenum is suitable for many high-temperature applications. TZM is a molybdenum-based alloy containing titanium and zirconium, designed to improve high-temperature strength and creep resistance in appropriate operating conditions.

6. Can molybdenum crucibles be used in vacuum furnaces?

Yes. Molybdenum crucibles are used in many vacuum and controlled-atmosphere furnace applications. Compatibility with the process material, operating temperature, vacuum level, and potential contamination must be evaluated before use.