Magnesia crucibles

Product Description

Magnesium Oxide Crucibles or Magnesia crucibles exhibit high mechanical strength and thermal shock resistance, along with good corrosion resistance too. Hence, their applications in the superalloy, nuclear, chemical and metallurgical industries has been highly recommended.

MgO crucibles are available in various purity and different ranges from clay to yttria and alumina depending on the application. These high temperature resistance crucibles can work under different atmospheres with the stability at 2400 oC in air, 1700 oC in reducing atmospheres, 1600 oC in a vacuum, and 1400 oC in hydrogen.

We can supply a wide range and the different sizes of Magnesia crucibles for your specific requirements to suit a range of applications.

We are a USA company catering products and solutions in the USA, Australia, New Zealand, India, Singapore, Malaysia, South Korea, Indonesia, Dubai, Philippines and Vietnam. Our team of experts across different platforms can discuss and customize your requirements as per your needs.

Please reach out to us at info@mkubeenterprise.com or call us at +1-732-808-1999 to discuss your projects.

Frequently Asked Questions:

Why choose MgO over Al₂O₃ or SiO₂ crucibles?

Magnesia crucibles excel when you need rapid heating and cooling or are working with highly alkaline melts. Compared to alumina or silica, magnesium oxide crucibles offer outstanding thermal shock resistance and remain chemically stable in corrosive environments. These qualities make them a top pick from any reputable magnesia crucible supplier.

What is the maximum operating temperature of MgO crucibles?

High-quality magnesia crucibles can operate continuously up to around 2000 °C (3632 °F) under controlled conditions. This ultra-high refractoriness allows them to outperform many other ceramic vessels in the hottest industrial and lab processes.

Are magnesia crucibles chemically resistant?

Yes, Magnesia crucibles resist attack from basic slags, metal oxides, and reactive fluxes—substances that would quickly degrade alumina or silica. Their chemical inertness makes them ideal for aggressive metallurgical and materials-testing applications.

Can magnesia crucibles be used in hydrogen or vacuum atmospheres?

Absolutely, Magnesium oxide crucibles remain stable in reducing, hydrogen, and vacuum environments, making them suitable for advanced metallurgical operations and high-purity research under controlled atmospheres.

What shapes and sizes are available in magnesia crucibles? Suppliers offer a variety of standard and custom forms, including:

• Cylindrical beaker-style crucibles
  
• Conical designs for easy pouring
  
• Flat-bottom and tall-form vessels
  
• Special shapes on request via your magnesia crucible supplier in USA

Can I get dense or fully sintered MgO crucibles?

Yes, Many manufacturers of magnesia crucibles USA provide fully sintered, high-density options. The denser structure enhances mechanical strength and extends service life during repeated thermal cycles.

Are magnesia crucibles safe for laboratory use?

Yes, magnesia crucibles are generally safe and effective for laboratory use—when used under appropriate conditions. Here’s why:

Advantages:

• High Thermal Stability: They can withstand temperatures up to ~2000°C, making them suitable for high-temperature applications.
• Chemical Resistance: Particularly resistant to basic (alkaline) substances, unlike alumina which is more resistant to acidic environments.
• Low Reactivity: Magnesia crucibles are inert in many environments, making them ideal for applications requiring minimal contamination.

Considerations:

• Hydroscopic Nature: Magnesium oxide can absorb moisture from the air, which may weaken the crucible over time—so proper storage is essential.
• Mechanical Fragility: While heat-tolerant, they can be more brittle than other crucibles and require careful handling.
• Not suitable for all chemistries: Avoid using acidic materials, as magnesia can react and degrade.

Magnesia crucibles are safe and efficient for labs that require high heat resistance and work with basic materials. Always match the crucible type to your chemical and thermal environment for best results.

Do MgO crucibles meet lab-grade purity standards?

Most magnesium oxide crucibles are made from ≥99% pure MgO, ensuring minimal contamination for analytical testing, research, and any application demanding strict chemical cleanliness.