Bubble Alumina Brick Refractory Material
DYSen Industrial
DYSen Industrial
DYSen Industrial

Bubble Alumina Fire Brick DYSEN Industrial

Bubble alumina brick is a type of lightweight refractory brick that is made from high-purity alumina aggregates in combination with a small amount of additives. It is characterized by its unique structure, which consists of numerous sealed spherical pores or bubbles within the brick matrix. These bubbles are formed during the manufacturing process, giving the brick its distinctive lightweight and insulating properties.

  • Payment :

    In Advance
  • Product Origin :

  • Shipping Port :

    Shanghai Port
  • Lead Time :

    15 Working days

Product parameters:

Index Level I Level II Level III
Al2O3, % ≥98 ≥98 ≥98
SiO2, % ≤1 ≤1 ≤1
Fe2O3, % ≤0.7 ≤0.7 ≤0.7
Refractoriness, ℃ ≥1790 ≥1790 ≥1790
Refractoriness under Load, 0.1MPa, ℃ ≥1600 ≥1600 ≥1600
Bulk density, g/cm3, ≤ 1.2 1.4 1.6
True porosity, %, ≥ 62 60 58
Cold crushing strength, MPa, ≥ 3 10 12
Thermal Conductvity, 1100℃, W.(m.k), ≤ 0.93 1.04  


key features and characteristics:

  1. Lightweight: Bubble alumina brick is exceptionally lightweight due to the presence of the sealed spherical bubbles. This property makes it easier to handle, transport, and install, reducing the overall weight and load on supporting structures.

  2. High Insulating Properties: The sealed bubbles in the brick effectively reduce its thermal conductivity, resulting in excellent insulation properties. Bubble alumina brick has low heat transfer characteristics, which makes it an ideal choice for applications where thermal insulation is crucial.

  3. Thermal Stability: Bubble alumina brick exhibits high-temperature stability and can withstand temperatures up to 1800°C (3272°F). It retains its structural integrity and insulation properties even under extreme heat conditions.

  4. Low Thermal Mass: Due to its high porosity and low density, bubble alumina brick has a low thermal mass. This means it can quickly heat up or cool down, allowing for rapid temperature changes in industrial processes.

  5. Good Chemical Resistance: Bubble alumina brick is chemically inert and shows excellent resistance to chemical attack from acids, alkalies, and other corrosive substances. It can withstand the harsh chemical environments in various industrial applications.

  6. Low Iron Content: Bubble alumina brick typically has low iron content, which makes it suitable for applications where iron contamination is a concern, such as in the glass and ceramic industries.

  7. Good Thermal Shock Resistance: The sealed bubble structure of the brick provides it with good thermal shock resistance. It can withstand rapid temperature changes without cracking or spalling, making it suitable for applications where thermal cycling occurs.


  • Petrochemical and chemical industries: Catalyst support beds, reformer insulation, and linings for reactors and furnaces.
  • Nonferrous metal industry: Aluminum reduction cells, ladles for molten aluminum, and crucibles.
  • Ceramic and glass industries: Kiln car decks, regenerators, and insulation for glass melting furnaces.
  • Heat treatment and thermal processing industries: Furnace linings, insulation in high-temperature kilns, and thermal insulation for heat-treating equipment.

Overall, bubble alumina brick offers a combination of lightweight structure, high thermal insulation, and good resistance to heat and chemicals. These properties make it an excellent choice for applications that require both insulation and high-temperature resistance while minimizing the weight and thermal mass of the refractory lining.

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