Molybdenum crucibles are mainly based on their manufacturing process, purpose, shape, size, material composition and surface treatment. The following are common classification methods:
- Classification by manufacturing process
Sintered molybdenum crucible:
It is made by pressing molybdenum powder into a shape through powder metallurgy process and then sintering it at high temperature.
Features: Low cost, suitable for mass production, but slightly lower density (~90-95% theoretical density), slightly inferior strength and durability.
Application: general high temperature melting or sintering process.
Forged molybdenum crucible:
from molybdenum billet through forging, turning and other mechanical processing.
Features: high density (close to 100% theoretical density), excellent mechanical strength and high temperature resistance, and high surface finish.
Application: High-precision processes such as semiconductor crystal growth and precious metal smelting.
Spinning molybdenum crucible:
The molybdenum sheet is processed into the crucible shape through the spinning process.
Features: Uniform wall thickness, suitable for thin-walled crucibles, moderate cost, but limited in size.
Application: small and medium-sized high temperature experiments or specific industrial applications.
Welding molybdenum crucible:
of welded molybdenum plates or sheets, it is suitable for complex shapes or large crucibles.
Features: High flexibility, but welds may affect high temperature performance.
Application: Special shape or large size requirements.
- Classification by material composition
Pure molybdenum crucible:
of high purity molybdenum (more than 99.95%).
Features: Good chemical stability, high temperature resistance (up to ~2000°C in vacuum), but poor oxidation resistance.
Application: High temperature processes under vacuum or inert atmosphere.
Molybdenum alloy crucible:
Doped with a small number of elements (such as tungsten, lanthanum, rhenium) or made into molybdenum -based alloys (such as Mo-W, Mo-La).
Features: Improved creep resistance, strength and oxidation resistance, but higher cost.
Application: Extremely high temperature or high mechanical stress environment.
- Classification by purpose
Crucible for metallurgy:
Used for smelting rare metals (such as tungsten and tantalum), precious metals (such as gold and silver) or alloys.
Features: High temperature resistance, corrosion resistance, and compatibility with molten materials.
Crucible for semiconductor:
Used for single crystal silicon, sapphire crystal growth or thin film deposition.
Features: high purity, smooth surface, high dimensional accuracy.
Crucibles for glass/ceramics:
Used for melting special glass or sintering high-temperature ceramics.
Features: Resistant to high temperature chemical corrosion, must avoid reaction with certain oxides.
Laboratory Crucibles:
Used for high temperature experiments, heat treatment or material testing in scientific research.
Features: Various sizes, suitable for various experimental conditions.
- Sort by shape
Cylindrical crucible: the most common, suitable for most melting and heat treatment processes.
Conical crucible: convenient for material pouring or specific crystal growth process.
Rectangular/square crucible: used for special processes or large equipment.
Custom Shapes: Customized to meet specific needs such as complex geometries.
- Sort by size
Small crucible: capacity ranges from a few milliliters to several hundred milliliters, suitable for laboratories or small-scale production.
Medium crucible: capacity ranges from several hundred milliliters to several liters, used in industry or scientific research.
Large crucible: with a capacity of more than tens of liters, used for large-scale metallurgy or semiconductor production.
- Classification by surface treatment
Polished crucible: The surface is polished to have high smoothness, reduce material adhesion, and is suitable for high-purity processes.
Coated crucible: The surface is coated with an anti-oxidation or anti-corrosion coating (such as alumina, silicide) to improve durability.
Untreated crucible: directly processed into shape, low cost, suitable for general use.
======================================================================
Customized R&D and Production of Tungsten, Molybdenum Products
Chinatungsten Online and CTIA GROUP LTD have been working in the tungsten industry for nearly 30 years, specializing in flexible customization of tungsten and molybdenum products worldwide, which are tungsten and molybdenum design, R&D, production, and overall solution integrators with high visibility and credibility worldwide.
Chinatungsten Online and CTIA GROUP LTD provide products mainly including: tungsten oxide products, such as tungstates such as APT/WO3; tungsten powder and tungsten carbide powder; tungsten metal products such as tungsten wire, tungsten ball, tungsten bar, tungsten electrode, etc.; high-density alloy products, such as dart rods, fishing sinkers, automotive tungsten crankshaft counterweights, mobile phones, clocks and watches, tungsten alloy shielding materials for radioactive medical equipment, etc.; tungsten silver and tungsten copper products for electronic appliances. Cemented carbide products include cutting tools such as cutting, grinding, milling, drilling, planing, wear-resistant parts, nozzles, spheres, anti-skid spikes, molds, structural parts, seals, bearings, high-pressure and high-temperature resistant cavities, top hammers, and other standard and customized high-hardness, high-strength, strong acid and alkali resistant high-performance products. Molybdenum products include molybdenum oxide, molybdenum powder, molybdenum and alloy sintering materials, molybdenum crucibles, molybdenum boats, TZM, TZC, molybdenum wires, molybdenum heating belts, molybdenum spouts, molybdenum copper, molybdenum tungsten alloys, molybdenum sputtering targets, sapphire single crystal furnace components, etc.
If you are interested in related products, please contact us:
Email: sales@chinatungsten.com
Tel: +86 592 5129696 / 86 592 5129595
