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Magnesium Oxide Ceramics (MgO)

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Magnesium Oxide Insulator

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Magnesium Oxide Insulator is a high-performance electrical insulator widely used in power transmission and distribution systems. Known for its excellent thermal conductivity, electrical insulating properties, and high mechanical strength. Heeger Materials is a professional supplier and manufacturer of high-quality magnesium oxide insulator, offering customized solutions and competitive prices.

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Data sheet

Density2.3-2.5 g/cm3
MaterialsMgO
Purity99.0%

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Magnesium Oxide Insulator is designed to electrically isolate and provide mechanical support to the thermoelements of thermocouples. With a melting point of 3098K, it boasts the highest melting point among oxides, ensuring excellent heat resistance. Known for its superior corrosion resistance in molten metal environments, magnesium oxide is a more versatile and reliable choice than aluminum oxide, making it ideal for a wide range of metal applications. This insulator guarantees long-lasting performance, even in extreme conditions, offering both electrical insulation and mechanical stability.

Magnesium Oxide Insulator

Magnesium Oxide Insulator Chemical Analysis

CompositionContent (%)
SiO₂0.1
Al₂O₃0.1
MgO98
CaO0.1
CrO0.1
SiC0.1

Magnesium Oxide Insulator 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 Insulator 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 Insulator 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 Insulator Applications

  • High-temperature Thermocouple Insulation and Protection: Magnesium Oxide Insulator can be used as an insulator between the thermocouple wires and between the wires and the outer metal protective sheath.
  • Insulation and Support for High-Temperature Heating Elements: Magnesium Oxide Insulator can serve as an insulating support structure for the heating conductor (e.g., molybdenum or tungsten wires), particularly in vacuum or protective atmosphere environments.
  • Protection Tubes for Special Sensors and Probes: Beyond thermocouples, other sensors that need to operate in high-temperature, corrosive environments (such as certain oxygen sensors, high-temperature probes) also use magnesium oxide insulators (porous MgO tubes) as protective sheaths.
  • Laboratory and Research Equipment: In scientific research requiring precise control of high-temperature environments, such as material sintering, crystal growth, or high-temperature chemical reactions, porous MgO tubes are often used as furnace tubes, sample boats, or insulating components.

Magnesium Oxide Insulator Packaging

The Magnesium Oxide Insulator 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.

Magnesium Oxide Insulator Packing

Where to Buy Magnesium Oxide Insulator in Bulk?

Heeger Materials Inc., a professional supplier and manufacturer of high-quality Magnesium Oxide Ceramics (MgO) products, including Magnesium Oxide Insulators, 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.

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