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.

Magnesia crucibles

Name: Magnesia crucibles
Brand: M-Kube
SKU: 2233
Availability: InStock
Rating: 5 (1 reviews)

Category: Magnesia

Product Description

Magnesia Crucibles – High-Temperature MgO Crucibles for Extreme Conditions

M-Kube Enterprise supplies high-purity magnesia crucibles made from premium magnesium oxide (MgO), designed for use in high-temperature, alkaline, and fusion analysis applications. With a melting point above 2800°C and outstanding chemical stability, our MgO crucibles are ideal for labs, metallurgy, ceramics, and research facilities across the USA

When alumina or silica isn’t enough, magnesia offers unmatched stability for harsh processing environments.

Custom and Standard MgO Crucibles for Thermal Processing

We offer a full range of standard and custom magnesia crucibles, engineered for demanding thermal applications. Whether for R&D or industrial-scale use, M-Kube Enterprise provides the reliability, precision, and performance you need.

Customization solutions include:

Cylindrical, conical, or tapered forms
Custom heights, diameters, and wall thicknesses
Open-bottom or closed-bottom designs
Interior surface finish options (polished or rough)
Custom hole drilling and prototype support

Our MgO crucibles can withstand up to 2000°C in air, 1700°C in reducing atmospheres, and 1600°C in vacuum conditions, making them ideal for challenging thermal and chemical environments.

Some of our offerings are shown below:

S.No	Product Code	Description
1	MgO-CyC-030—050-3.5mm hole-00003	30 mm Diameter x 50 mm Height crucible with a 3.5 mm hole drilled at the bottom of the crucible
2	MgO-CyC-037—072-00007	White Magnesia cylindrical crucible OD 37 mm, Height 72 mm
3	MgO-CyC-049-040.4-145-00006	White Magnesia cylindrical crucible OD 49 mm, ID 40.4 mm, Height 145 mm
4	MgO-CyC-059-049-085-00005	White Magnesia cylindrical crucible OD 59 mm, ID 49 mm, Height 85 mm
5	MgO-CyC-070—145-00004	White Magnesia cylindrical crucible OD 70 mm, Height 145 mm
6	MgO-CyC-100-080-150-00001	White Magnesia Cylindrical Crucible (Tall form) OD 100 mm, ID 80 mm, H 150 mm
7	MgO-CyC-170-140-050-00002	White Magnesia Cylindrical Crucible (Flat form) OD 170 mm, ID 140 mm, H 50 mm
8		Custom sizes can be made available upon request. Call us at +1-732-808-1999or email us at info@mkubeenterprise.comfor more information.

Key Performance Properties of Magnesia Crucibles

Our MgO ceramic crucibles are engineered to deliver:

Extreme temperature resistance: up to 2000°C
Superior stability in basic and alkaline environments
Minimal reactivity with metals and refractory materials
High thermal conductivity and shock resistance
Good electrical insulation at elevated temperatures
High-density, low-porosity ceramic construction

These properties make magnesia an ideal material for processes that demand high purity and thermal durability.

Applications of Magnesia Crucibles in Industries

Magnesia crucibles are used in a variety of USA industrial and research sectors, including:

Fusion flux analysis in mining and mineral labs
Metallurgical sample preparation
Rare earth and superalloy processing
Thermal treatment of alkaline and reactive metals
Sintering, ashing, and ceramic testing
High-temperature R&D experiments

Looking for other options? Explore our alumina crucibles, quartz crucibles, or boron nitride crucibles depending on your specific chemical or thermal compatibility needs.

Why USA Customers Choose M-Kube Enterprise for MgO Crucibles

M-Kube Enterprise is a global supplier with technical expertise and fast support for North American customers:

High-purity MgO grades for critical applications
Custom sizes and high-volume capabilities
Consistent product quality and dimensional control
Expert technical consultation
Responsive service and international delivery

We help ensure your materials testing, melting, or fusion applications run with reliability and repeatability.

Reliable USA Supplier of Magnesia Crucibles for Extreme Heat Applications

M-Kube Enterprise delivers high-purity magnesium oxide (MgO) crucibles built to withstand extreme temperatures up to 2400°C and corrosive environments. Our crucibles are ideal for fusion flux analysis, metallurgical testing, and ceramic R&D under reducing, vacuum, or hydrogen atmospheres.

Cylindrical, conical, and custom geometries available
Excellent resistance to basic slags and reactive materials
Custom sizes and fast delivery backed by expert support

📞 Call +1-732-808-1999 or
📧 Email info@mkubeenterprise.com
to get a quote or consult with our high-temperature ceramics team today.

Product FAQ's

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 process

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.

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.