Ultra-Lightweight Al2O3 Alumina Bubble Brick for High-Temperature Insulation

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Insulation and Refractory Materials

fireproof alumina bubble brick
al203 alumina bubble brick
ultra-lightweight alumina bubble brick
ultra-lightweight alumina bubble brick
fireproof alumina bubble brick
al203 alumina bubble brick
ultra-lightweight alumina bubble brick
ultra-lightweight alumina bubble brick
Fireproof Alumina Bubble Brick

Laurel’s ultra-lightweight alumina bubble brick is a high-performance refractory solution engineered for extreme thermal environments. Made from high-purity Al2O3 alumina bubble brick materials, it features a unique cellular structure filled with alumina hollow spheres. This design delivers superior insulation, low thermal conductivity, and high compressive strength in a fireproof alumina bubble brick format.

Laurel’s ultra-lightweight alumina bubble brick is engineered for thermal insulation applications where performance, weight reduction, and fire resistance are non-negotiable. Whether you're designing advanced furnaces or upgrading existing high-temperature equipment, our fireproof alumina bubble brick solutions offer unmatched reliability and thermal efficiency.


Product Details


Advantages

Certified fireproof alumina bubble brick for 1800°C operations

Energy-efficient with ultra-low heat transfer

Lightweight for easy handling and reduced furnace weight

Long-lasting under severe temperature fluctuations

Available Al2O3 alumina bubble brick in standard and custom formats

Compliant with ISO, ASTM, and CE global refractory standards



Table parameters

Item

Alumina Bubble Brick

Types

Unit

85#

90#

99#

The Highest Service Temperature

1680

1700

1800

Al2O3

%

≥85

≥90

≥99

SiO2

%

≤15

≤8

≤0.2

Fe2O3

%

≤0.2

≤0.2

≤0.2

Bulk Density

g/cm3

1.4-1.7

1.4-1.7

1.4-1.7

Cold Crushing Strength

MPa

≥12

≥10

≥9

Refractoriness Under Load (0.1MPa, 0.6%)

≥1650

≥1770

≥1800

Reheating Linear Change Rate (1600℃*3h)

%

±0.3

±0.3

±0.3

Thermal Conductivity (Average temperature 800℃ )

W/(m*k)

≤0.8

≤1.3

≤1.5


Features

Features

Lightweight & Energy Efficient

As an ultra-lightweight alumina bubble brick, it reduces thermal mass and accelerates heat-up and cool-down times, enhancing operational efficiency and reducing fuel demand.

Fireproof & Thermally Stable

This fireproof alumina bubble brick maintains its structure and insulation performance at extreme heat, offering prolonged service life even under thermal cycling.

High Purity & Corrosion Resistance

The Al2O3 alumina bubble brick structure is resistant to slag, alkalis, and metal vapors—ideal for oxidizing, reducing, or neutral furnace atmospheres.

Precision-Machined for Seamless Fit

Available in standard and customized formats, alumina bubble brickk ensures tight joints, minimizing heat loss and improving insulation efficiency.


Inquiry Now

contact us

Your satisfaction is our top priority. Whether you have questions, need support, or want to share feedback, our dedicated team is ready to assist you every step of the way.

+86-15264257623

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info@laurelrefractory.com

+86-532-80829560