Magnesium Oxide Foam Filter

Magnesia Ceramic Foam Filter 1024x683 1

Magnesium Oxide Foam Filter

Porosity: 80%-90%
Cell Size: 8–40 PPI

  • Custom sizes and standard sizes in stock
  • Competitive Price
  • Quick Lead Time

  • Magnesium Oxide Foam Filter offers a dependable solution for filtering molten magnesium alloys during casting. Its open-cell structure, formed through high-temperature sintering of magnesia-coated foam, ensures efficient removal of impurities and trapped gas. This leads to smoother metal flow, fewer casting flaws, and improved part consistency. Its strong chemical stability makes it suitable for use in demanding foundry environments. We can supply high-quality magnesium oxide foam filters with various specifications and competitive prices, offering customized solutions to meet specific requirements.
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Magnesium Oxide Foam Filter Data Sheet

Color:

Dark yellow

Chemical Formula:

MgO

Density:

3.20 g/cm3

Dimension:

customized

Shape:

Round, square or customized

Pore Density (PPI):

8–40

Porosity (%):

80–90

Refractoriness (°C):

1100

Bending Strength (MPa):

0.6

Compression Strength (MPa):

0.8

Thermal Shock Resistance:

6 times (1100°C to room temperature)

Applicable Alloys:

Nickel and high-activity alloys

Magnesium Oxide Foam Filter Description

Magnesium oxide foam filter is a specialized filtration material designed for magnesium alloy casting. It is made by applying a magnesia-based slurry onto a polyurethane sponge and sintering it to form a rigid, porous ceramic structure. This filter effectively removes inclusions and traps gas during metal flow, enhancing casting purity and surface quality. Its excellent chemical compatibility with molten magnesium helps reduce reaction and contamination, making it a reliable choice for improving casting yield and reducing defects.

Magnesium Oxide Foam Filter Features

  • Excellent filtration efficiency for magnesium alloys
  • High porosity with uniform cell structure
  • Chemically stable with molten magnesium
  • Low thermal mass for fast heat transfer
  • Lightweight and easy to handle during installation

Magnesium Oxide Foam Filter Applications

  • Magnesium Alloy Purification: Effectively filters out inclusions and oxides, enhancing the structural uniformity of magnesium castings.
  • Lightweight Automotive Components: Used in casting precision parts like transmission cases and steering brackets, improving material performance and weight reduction.
  • High-Performance Aerospace Castings: Ensures cleaner melts and fewer casting defects in critical aerospace magnesium alloy parts.
  • Consumer Electronics Casting: Applied in the molding of compact magnesium alloy shells for phones, laptops, and handheld devices.
  • Eco-Friendly Foundry Operations: Supports energy-efficient casting lines that prioritize low emissions and reduced material waste.
  • Aerospace Applications HM
    Aerospace
  • Automotive Industry 1
    Automotive Industry
  • Metal Smelting
    Metal Smelting
  • Electronic Devices
    Electronic Devices

Magnesium Oxide Material 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

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

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 Ceramic Machining

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 products in their original condition.

ceramic products packing HM

Download

  • Magnesium Oxide Data Sheet_PDS
  • SAFETY DATA SHEET (SDS) – Magnesium Oxide Ceramic

Get A Quote

We will check and get back to you in 24 hours

To customize your magnesium oxide foam filter, please provide the following details:

  1. Dimensions: Specify the length, width, thickness, or diameter.
  2. Shapes: Rectangular, square, round, or customized.
  3. Cell Size: Choose the right cell size base on the application (e.g., 10 PPI, 15 PPI, 20 PPI, 30 PPI, etc.)
  4. Molten Metal Type: Specify the molten metal (e.g., iron, steel, aluminum, copper, etc.)
  5. Pouring Temperature: Indicate the pouring temperature of the molten metal.
  6. Filtration Efficiency: Indicate the level of the filtration efficiency required.
  7. Quantity of the products you need
  8. Alternatively, you can provide a drawing with your specifications.

Once we have these details, we can provide you with a quote within 24 hours.h a quote within 24 hours.ith a quote within 24 hours.can provide you with a quote within 24 hours.

We carry a wide variety of graphite ceramic products in stock, and for these, there is generally no minimum order requirement. However, for custom orders, we typically set a minimum order value of $200. The lead time for stock items is usually 1-2 weeks, while custom orders usually take 3-4 weeks, depending on the specifics of the order.

Magnesium oxide foam filter is typically placed in the gating system, ensuring it’s fully supported and allows molten metal to flow evenly.

Magnesium oxide foam filter traps slag and impurities, improving flow dynamics and reducing defects in the final cast product.

Advanced Ceramic Hub, established in 2016 in Colorado, USA, is a specialized supplier and manufacturer of graphene products. With extensive expertise in supply and export, we offer competitive pricing and customized solutions tailored to specific requirements, ensuring outstanding quality and customer satisfaction. As a professional provider of ceramics, refractory metals, specialty alloys, spherical powders, and various advanced materials, we serve the research, development, and large-scale industrial production needs of the scientific and industrial sectors.

Magnesium Oxide Foam Filter

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