Magnesium Oxide Tube

Magnesium Oxide Tube
Purity: ≥99%
- Custom sizes and standard sizes in stock
- Quick Lead Time
- Competitive Price
Magnesium oxide tube is a high-purity ceramic known for its excellent thermal stability, electrical insulation, and corrosion resistance. With a melting point of 2800°C, it performs well in high-temperature environments, making it ideal for thermocouple protection, furnace insulation, and metal processing. Its low dielectric loss and high electrical resistivity also make it suitable for electrical applications. As a leading supplier and manufacturer of premium graphite products, Shanghai Yuepeng can supply high-quality magnesium oxide tube with various specifications and competitive prices, offering customized solutions to meet specific requirements.
Magnesium Oxide Tube Sheet
| Color: | White/Ivory |
| Chemical Formula: | MgO |
| Refractoriness: | Super high grade (Refractoriness > 2000°) |
| Density: | 3.30~3.55 g/cm3 |
| Melting Point: | 2800°C±13°C |
| Dimension: | customized |
| Working temperature: | 2400°C |
| Compressive strength: | 1000 MPa |
| Flexural strength: | 300 MPa |
| Surface: | Glass/Polished |
| Processing services: | Bending, welding, punching, decoiling, cutting, molding |
Magnesium Oxide Tube Description
Magnesium oxide tube is a refractory ceramic product known for its ability to withstand extreme heat and harsh chemical environments. With a high melting point and low electrical conductivity at room temperature, it’s an effective solution for insulating elements in high-temperature systems. These tubes are often used in scientific equipment, thermal processing lines, and nuclear-related applications where stability and purity are critical.
Magnesium Oxide Tube Features
- High temperature resistance up to 2400°C in oxidizing or inert atmospheres
- Excellent thermal insulation and low thermal conductivity
- High electrical resistivity at room temperature
- Chemically stable against most acids and basic slags
- Good compatibility with thermocouples and heating elements
Magnesium Oxide Tube Applications
- High-Temperature Furnaces: Magnesium oxide tubes are widely used as protective and insulating components in high-temperature furnaces, ensuring stability and preventing heat loss during operation.
- Thermocouple Protection: These tubes serve as protective sheaths for thermocouples, safeguarding temperature sensors from oxidation, corrosion, and mechanical damage in extreme environments.
- Electrical Insulation: MgO tubes are used in electric heating elements and other electronic systems to provide effective insulation and prevent electrical short circuits.
- Chemical Processing Equipment: Due to their excellent resistance to corrosion and chemical attack, magnesium oxide tubes are applied in reactors and systems handling aggressive substances.
- Laboratory Applications: They are used in laboratory settings for sample heating, gas flow control, and high-temperature experiments, offering reliable performance and long service life.
- High-Temperature Laboratories
- High-Temperature Furnaces
- Thermal Management Materials
- Chemical Industry
- Laboratory Equipment
Magnesium Oxide Material Properties
Magnesium Oxide Ceramic Machining

Magnesium oxide can be machined in green or bisque form before sintering, and to a limited extent in its fully sintered state. In its pre-sintered state, the material is relatively soft and easier to shape, but like many ceramics, it undergoes significant shrinkage—up to 20%—during sintering, which can affect final dimensions. Fully sintered magnesium oxide is very hard and brittle, requiring diamond tools and precision equipment for any post-sintering machining.
Machining Methods and Considerations
- Green or Bisque Machining: Easier to cut and form, suitable for complex shapes before firing.
- Sintering Shrinkage: Expect about 15–20% dimensional reduction during sintering, which impacts tolerance control.
- Post-Sintering Machining: Requires diamond grinding tools due to the material’s hardness and brittleness.
- Fragility: Fully sintered MgO is prone to chipping and fracture if not handled with care during machining.
- Tooling and Time: Machining dense MgO ceramics is time-consuming and requires specialized equipment.
Magnesium Oxide Ceramic Packaging
Magnesium Oxide Ceramic products are typically packaged in vacuum-sealed bags to prevent moisture or contamination and wrapped with foam to cushion vibrations and impacts during transport, ensuring the quality of the products in their original condition.

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