Sintered AZS brick

Sintered AZS bricks utilize pre-synthesized high-purity zirconia-alumina clinker as aggregate. They are manufactured through micropowder grading, high-pressure forming, and precise high-temperature tunnel kiln firing. The core technology lies in forming a stable mullite-alumina-zirconia composite ceramic bonding phase during sintering, rather than the glassy bonding found in fused AZS. This yields unique properties:

Superior corrosion resistance: Uniformly distributed zirconia (ZrO₂ content typically 15%-25%) significantly enhances resistance to chemical erosion from molten glass and alkaline vapors.

Exceptional thermal shock and spalling resistance: A uniform microporous structure and ceramic bonding provide thermal shock stability markedly superior to fused AZS, minimizing structural spalling in areas with extreme temperature fluctuations.

Reduced leaching risk: Absence or minimal glass phase fundamentally prevents contamination of molten glass due to glass phase migration.

Uniform physical structure: Isotropic properties ensure stable performance with excellent machinability and installation adaptability.

Key Technical Parameters:

Al₂O₃ Content: ≥ 70%

ZrO₂ Content: 15%–25% (adjustable per requirement)

Bulk Density: ≥ 3.10 g/cm³

Apparent Porosity: ≤ 18%

Room Temperature Compressive Strength: ≥ 100 MPa

Load-bearing Softening Start Temperature (0.2MPa): ≥ 1600℃

Thermal Shock Stability (1100℃ water quenching): ≥ 20 cycles

Sintered AZS bricks, with their balanced corrosion resistance and thermal shock resistance, are widely used in industrial sectors with special material requirements:

1. Glass melting furnaces: Upper and middle layers of regenerator grate structures, flue passages, partial side walls and bottom corners of small furnaces, as well as relatively mildly corroded areas like working pools and feed channels in contact with molten glass.

2. Chemical and Environmental Kilns: Lining for combustion chambers in waste incinerators and hazardous waste treatment furnaces, resisting alkali fly ash erosion.

3. Metallurgy: Areas above the slag line in ladle refining furnaces (LF furnaces), impact plates in tundishes, and slag retaining walls.

4. Ceramics Industry: High-temperature kiln furniture (e.g., kiln shelves, kiln pillars) in roller kilns producing premium sanitaryware and tableware.

5. Replacement and Upgrade Applications: Substitute traditional high-alumina bricks to extend kiln lifespan, or replace fused AZS bricks to optimize cost and thermal shock resistance.

Zhengzhou Chaoyu Refractories Co., Ltd. leverages its mature sintering technology platform to provide customers with professional products and services:

Flexible Custom Formulations: Adjust zirconia content and matrix composition based on specific operating conditions (corrosive media, temperature curves) to optimize product performance.

Full Range of Dimensions: Manufacture standard bricks, common special-shaped bricks, and complex custom-shaped bricks to meet diverse masonry requirements.

Rigorous Quality System: Comprehensive monitoring from raw material pre-synthesis to finished product firing ensures stable performance, consistent batches, and compliance with relevant industry standards.

Comprehensive Solutions: Provide technical and economic comparative analysis to help customers select the optimal choice among fused AZS, sintered AZS, and other materials.

On-Site Application Guidance: Dispatch engineers to offer bricklaying guidance and furnace drying plan support, ensuring products deliver peak performance.

Efficient Global Supply: Flexible production planning and international logistics channels guarantee timely delivery.

For detailed performance comparisons between sintered AZS and fused AZS bricks, sample requests, or customized consultations, please visit our official website or contact our technical sales department. Zhengzhou Chaoyu Refractories Co., Ltd. is committed to providing cost-effective, durable solutions for your kilns with professional expertise and reliable products.