Bubble alumina brick
Application Industry: Common Refractory Materials, Lightweight Insulating Refractories, Industrial Ceramics, Electronic Ceramics, Petrochemical Industry, and Metallurgy
Application Equipment: High Temperature Industrial Furnace Lining, Petrochemical Methane Reformer Lining, Hydrogen Furnace Lining, Carbon Black Reactor Lining, and Ultra High Temperature Kiln Heat Insulation Material
Size: Custom bubble alumina brick geometry per high temperature industrial furnace design (free engineering on request)
Products Overview
Our Bubble alumina brick is a high-performance lightweight insulating refractory product engineered for high temperature industrial furnace lining, petrochemical methane reformer lining, hydrogen furnace lining, carbon black reactor lining, and ultra high temperature kiln heat insulation material. Also known as alumina bubble brick or alumina hollow sphere brick, this product is manufactured by Zhengzhou caihua from high purity alumina fused and blown into hollow microspheres at temperatures above 2100 °C. The fundamental technical difference lies in its primary aggregate: the Alumina Hollow Sphere, which is produced via a high-energy process where compressed air is blown through a stream of molten alumina to create thin-walled, hollow ceramic balls with a trapped air pocket inside, reducing the brick’s overall weight by 60% compared to dense corundum bricks while maintaining the chemical inertness of the corundum phase.
The Bubble alumina brick product family is offered in four engineering-proven chemistry grades per customer-provided data. The CHSAH99 grade features Al2O3 content minimum 99.3%, SiO2 content up to 0.15%, Fe2O3 content up to 0.1%, Bulk Density 1.5-1.8 g/cm³, Cold Crushing Strength minimum 12 MPa, Initial Softening Temperature under Load minimum 1700 °C, and Max Service Temperature 1800 °C. The CHAH99 grade features Al2O3 content minimum 99%, SiO2 content up to 0.3%, Fe2O3 content up to 0.1%, Bulk Density 1.5-1.8 g/cm³, Cold Crushing Strength minimum 15 MPa, Initial Softening Temperature under Load minimum 1700 °C, and Max Service Temperature 1800 °C. The CHAH90 grade features Al2O3 content minimum 90%, SiO2 content up to 9%, Fe2O3 content up to 0.2%, Bulk Density 1.4-1.9 g/cm³, Cold Crushing Strength minimum 18 MPa, Initial Softening Temperature under Load minimum 1700 °C, and Max Service Temperature 1800 °C. The CHAH85 grade features Al2O3 content minimum 85%, SiO2 content up to 14%, Fe2O3 content up to 0.2%, Bulk Density 1.4-1.9 g/cm³, Cold Crushing Strength minimum 18 MPa, Initial Softening Temperature under Load minimum 1700 °C, and Max Service Temperature 1750 °C.
Per customer-provided data, CH Refractories Alumina Bubble Insulation Bricks are mainly used in refractory materials, industrial ceramics, electronic ceramics, petrochemical industry, metallurgy and other industries of the lining of high temperature kiln, and as the heat insulation material of ultra high temperature kiln. Sourced from our Xinmi City, Zhengzhou, Henan, China facility, each Bubble alumina brick grade is engineered to ASTM, GB/T, and ISO refractory standards. For an overview of the broader catalogue, see the Common Refractory Materials category, or contact our technical sales team for a free consultation against your high temperature industrial furnace design.
Product Features
Features:
- Manufactured by Zhengzhou caihua from high purity alumina fused and blown into hollow microspheres to produce a high performance bubble alumina brick also known as alumina bubble brick or alumina hollow sphere brick
- Engineering-proven characterized with high alumina purity, hollow sphere structure, low bulk density, low thermal conductivity, high temperature resistance, and good thermal shock resistance
- Multi-grade chemistry series CHSAH99, CHAH99, CHAH90, CHAH85 covering Al2O3 content 85%-99.3% and Max Service Temperature 1750-1800 °C per customer-provided data
- Customer-provided application includes refractory materials, industrial ceramics, electronic ceramics, petrochemical industry, metallurgy, and other industries of the lining of high temperature kiln, and as the heat insulation material of ultra high temperature kiln
- Bulk Density 1.4-1.9 g/cm³, Cold Crushing Strength 12-18 MPa, Initial Softening Temperature under Load up to 1700 °C for matching different high temperature industrial furnace insulation service
Product Specification
Bubble alumina brick
| Item | Utra purity bubble alumina brick | Bubble alumina brick | ||
|---|---|---|---|---|
| CHSAH99 | CHAH99 | CHAH90 | CHAH85 | |
| Max service temperature (°C) | 1800 | 1800 | 1800 | 1750 |
| Al2O3 (%) | ≥99.3 | ≥99 | ≥90 | ≥85 |
| SiO2 (%) | ≤0.15 | ≤0.3 | ≤9 | ≤14 |
| Fe2O3 (%) | ≤0.1 | ≤0.2 | ≤0.2 | ≤0.2 |
| Bulk density (g/cm³) | 1.5-1.8 | 1.5-1.8 | 1.4-1.9 | 1.4-1.9 |
| Cold crushing strength (MPa) | ≥12 | ≥15 | ≥18 | ≥18 |
| Initial softening temperature under load (°C) | ≥1700 | ≥1700 | ≥1700 | ≥1700 |
| Permanent linear change (%) | -0.25 | -0.25 | -0.2 | -0.3 |
| Coefficient of heating expansion (at 1300°C) |
8.6 | 8.6 | 8 | 7.8 |
| Thermal conductivity (W/(m·k)) | 0.75 | 0.75 | 0.6 | 0.55 |
| Application | CH Refractories Alumina Bubble Insulation Bricks mainly used in refractory materials, industrial ceramics, electronic ceramics, petrochemical industry, metallurgy and other industries of the lining of high temperature kiln, and as the heat insulation material of ultra high temperature kiln. | |||
Note: Ten performance parameters specified per source image: Max service temperature, Al2O3, SiO2, Fe2O3, Bulk density, Cold crushing strength, Initial softening temperature under load, Permanent linear change, Coefficient of heating expansion, Thermal conductivity, and Application. Four chemistry grades engineered for ultra purity and standard bubble alumina brick service. For project-specific chemistry and grade, contact CH Refractories engineering.
Product Applications
Bubble alumina brick is a high-performance lightweight insulating refractory product engineered for high temperature industrial furnace lining, petrochemical methane reformer lining, hydrogen furnace lining, carbon black reactor lining, and ultra high temperature kiln heat insulation material. Also known as alumina bubble brick or alumina hollow sphere brick, this product is manufactured by Zhengzhou caihua from high purity alumina fused and blown into hollow microspheres. The product family features hollow sphere structure with low bulk density, low thermal conductivity, high temperature resistance, and good thermal shock resistance, with stable quality and good engineering performance across the global refractory value chain.
Application Industry: Common Refractory Materials, Lightweight Insulating Refractories, Industrial Ceramics, Electronic Ceramics, Petrochemical Industry, and Metallurgy.
Target Equipment: High Temperature Industrial Furnace, Petrochemical Methane Reformer, Hydrogen Furnace, Carbon Black Reactor, and Ultra High Temperature Kiln Heat Insulation Material of small, medium-size, and large industrial operations across the global refractory value chain.
Specific Application Zones: The CHSAH99 grade is engineered for ultra-purity high temperature industrial furnace insulation service per customer-provided data with Al2O3 content minimum 99.3%, SiO2 content up to 0.15%, Fe2O3 content up to 0.1%, Bulk Density 1.5-1.8 g/cm³, Cold Crushing Strength minimum 12 MPa, Initial Softening Temperature under Load minimum 1700 °C, Permanent Linear Change -0.25%, Coefficient of Heating Expansion 8.6 at 1300 °C, Thermal Conductivity 0.75 W/(m·k), and Max Service Temperature 1800 °C. The CHAH99 grade is engineered for ultra-purity high temperature industrial furnace insulation service with Al2O3 content minimum 99%, SiO2 content up to 0.3%, Fe2O3 content up to 0.1%, Bulk Density 1.5-1.8 g/cm³, Cold Crushing Strength minimum 15 MPa, Initial Softening Temperature under Load minimum 1700 °C, Permanent Linear Change -0.25%, Coefficient of Heating Expansion 8.6 at 1300 °C, Thermal Conductivity 0.75 W/(m·k), and Max Service Temperature 1800 °C. The CHAH90 grade is engineered for high temperature industrial furnace insulation service with Al2O3 content minimum 90%, SiO2 content up to 9%, Fe2O3 content up to 0.2%, Bulk Density 1.4-1.9 g/cm³, Cold Crushing Strength minimum 18 MPa, Initial Softening Temperature under Load minimum 1700 °C, Permanent Linear Change -0.2%, Coefficient of Heating Expansion 8 at 1300 °C, Thermal Conductivity 0.6 W/(m·k), and Max Service Temperature 1800 °C. The CHAH85 grade is engineered for standard high temperature industrial furnace insulation service with Al2O3 content minimum 85%, SiO2 content up to 14%, Fe2O3 content up to 0.2%, Bulk Density 1.4-1.9 g/cm³, Cold Crushing Strength minimum 18 MPa, Initial Softening Temperature under Load minimum 1700 °C, Permanent Linear Change -0.3%, Coefficient of Heating Expansion 7.8 at 1300 °C, Thermal Conductivity 0.55 W/(m·k), and Max Service Temperature 1750 °C. All four grades deliver hollow sphere aggregate structure with optimal combination of light weight, high strength, and excellent thermal insulation performance, with stable quality and good engineering performance across the global refractory value chain.
CH Refractories is a Bubble alumina brick manufacturer in China, Henan, Zhengzhou. The complete Bubble alumina brick product family is manufactured in our Xinmi City, Zhengzhou, Henan, China facility to ASTM, GB/T, and ISO refractory standards. Each batch is supported by free consultation, on-site technical support, and a dedicated engineering team serving Common Refractory Materials customers across the global refractory value chain.
