Magnesium Oxide Crucible - MgO Crucible

Magnesium Oxide Crucible is made from high-purity magnesia ceramic, offering excellent thermal stability and resistance to chemical attack in high-temperature environments. It performs reliably in applications involving molten metals, oxides, and aggressive slags, especially at temperatures exceeding 2000°C. With low thermal conductivity and a high melting point, this crucible is ideal for use in vacuum systems, metal processing, and ceramic sintering. Both cylindrical and conical shapes are available, and custom dimensions can be produced to meet specific lab or industrial needs. Heeger Materials (HM) provides durable MgO crucibles for consistent performance in demanding thermal and chemical environments.

Magnesium Oxide Crucible Selection Guide

Magnesium oxide crucibles are used for high-temperature laboratory and industrial processes where thermal stability, electrical insulation and chemical compatibility are required. Important specifications include capacity, diameter, height, wall thickness, purity, working temperature, atmosphere and the material being melted or heated.

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FAQ

Are custom MgO crucibles available? Yes. Custom dimensions, capacity, wall thickness and special shapes can be reviewed based on drawings.

Magnesium Oxide Crucible Specifications

Color:	White/Ivory
Chemical Formula:	MgO
Refractoriness:	Super high grade (Refractoriness > 2000°)
Density:	3.20 g/cm3
Type:	Dielectric ceramic
Dimension:	customized
Shape:	Cylinder, Conical Cylinder, Rectangular, T-shape, or customized.
Working temperature:	2000°C
Compressive strength:	1000 MPa
Flexural strength:	300 MPa
Surface:	Glass/Polished
Processing services:	Bending, welding, punching, decoiling, cutting, molding

Magnesium Oxide Crucible Chemical Composition

Composition	Content (%)
SiO₂	0.1
Al₂O₃	0.1
MgO	98
CaO	0.1
CrO	0.1
SiC	0.1

Magnesium Oxide Crucible Physical Properties

Property	Value	Unit
Specific Gravity (S.G)	3.58	g/cm³
Porosity	10	%
Vickers Hardness (HV1)	650	HV
Flexural Strength	105	MPa
Compressive Strength	275	MPa
Young's Modulus	2.1 x 10¹¹	Pa (N/m²)
Fracture Toughness	1.8	MPa·m^1/2

Magnesium Oxide Crucible Thermal Properties

Property		Value	Unit
Coefficient of Thermal Expansion	40℃ to 400℃	10.0 × 10⁻⁶	/°C
	40℃ to 800℃	10.5 × 10⁻⁶	/°C
Thermal Conductivity		42	W/m·K
Specific Heat		0.92	J/g·°C
Dielectric Strength (Thermal Shock Resistance)		17	kV/mm

Magnesium Oxide Crucible Electrical Properties

Property		Value	Unit
Volume Resistivity	At 20°C	> 10¹⁴	Ω·cm
	At 500°C	> 108	Ω·cm
Permittivity (Dielectric Constant) @ 1 MHz		9.8	C²/(N·m²) or (Dimensionless)
Dielectric Loss Tangent @ 1 MHz		1 × 10⁻⁴	-

Magnesium Oxide Crucible Advantages 

• High-Temperature Resistance: Withstands temperatures exceeding 2000°C, making it suitable for extreme thermal environments.
• Chemical Stability: Inert to most molten metals, oxides, and slags, ensuring minimal contamination.
• Low Thermal Conductivity: Helps maintain temperature control and thermal insulation during high-temperature operations.
• High Purity: Made from high-purity MgO to ensure consistent performance and reliable results.
• Customizable Shapes: Available in various sizes and geometries to meet laboratory and industrial requirements.

Magnesium Oxide Crucible Applications

• Metal and Alloy Melting: Used for melting high-purity metals such as uranium, thorium, and platinum group metals.
• Rare Earth Processing: Suitable for sintering and melting rare earth compounds at high temperatures.
• Laboratory Analysis: Employed in thermal analysis, ash content testing, and high-temperature research.
• Glass and Ceramic Industry: Used in high-temperature glass melting and ceramic material synthesis.
• Aerospace and Nuclear Fields: Ideal for extreme thermal environments in advanced material development.

Magnesium Oxide Crucible Packing

The Magnesium Oxide Crucible is securely packed in wooden crates or cartons, reinforced with cushioning materials to prevent movement during transit. This packaging approach ensures that the products remain intact and protected throughout the shipping process.

Where to Buy Magnesium Oxide Crucible in Bulk?

Heeger Materials Inc., a professional supplier and manufacturer of high-quality Magnesium Oxide Ceramics (MgO) products, including Magnesium Oxide Crucibles, leverages extensive expertise in supply and export to offer competitive prices. We provide customized solutions to meet specific requirements, ensuring exceptional quality and customer satisfaction.

Heeger Materials Inc. was established in 2016 in Colorado, USA. We specialize in premium-grade metals, alloys, ceramics, powders, and other materials catering to research, development, and large-scale industrial production in scientific and industrial sectors.