Product Overview

Our High-Performance Alumina-Zirconia Mullite Refractory Bricks represent the pinnacle of advanced refractory technology. These machine-pressed bricks are manufactured from premium-grade industrial alumina and zircon concentrate, utilising high-temperature sintering processes to achieve exceptional performance characteristics.

The unique combination of alumina (Al₂O₃), silica (SiO₂), and zirconia (ZrO₂) creates a robust crystalline structure with superior resistance to thermal shock, chemical corrosion, and mechanical stress. These bricks are specifically engineered for demanding industrial applications where conventional refractories fail.

Our manufacturing process incorporates advanced quality control systems and adheres to international standards including ASTM C545 for zircon refractories and ISO quality management protocols, ensuring consistent performance and reliability in critical applications.

Key Performance Indicators

  • Maximum Operating Temperature: 1800°C - Exceptional high-temperature stability
  • Thermal Shock Resistance: Superior performance in rapid temperature cycling
  • Chemical Stability: Excellent resistance to alkaline and acidic environments
  • Mechanical Strength: High compressive strength at elevated temperatures
  • Low Thermal Conductivity: Enhanced energy efficiency and heat retention
  • Dimensional Stability: Minimal thermal expansion and creep resistance

Detailed Technical Specifications

Property Value Unit Test Method
Al₂O₃ Content 60-65 % ASTM C573
ZrO₂ Content 15-30 % ASTM C545
SiO₂ Content 15-25 % ASTM C573
Bulk Density 3.2-3.5 g/cm³ ASTM C20
Apparent Porosity ≤15 % ASTM C20
Cold Crushing Strength ≥200 MPa ASTM C133
Modulus of Rupture (1400°C) ≥35 MPa ASTM C583
Refractoriness Under Load (0.2MPa) ≥1700 °C ASTM C16
Thermal Expansion (1000°C) 0.6-0.8 % ASTM C832
Thermal Conductivity (1000°C) 2.8-3.2 W/m·K ASTM C182
Permanent Linear Change (1600°C×3h) ±0.2 % ASTM C113
Maximum Service Temperature 1800 °C Continuous Operation

Industrial Applications

Glass Manufacturing Industry

  • Glass furnace melting tank bottoms and walls
  • Regenerator checker brick systems
  • Forehearth superstructure components
  • Glass feeder channel linings
  • Crown and port arch applications

Steel & Metallurgical Industry

  • Continuous casting tundish linings
  • Heating furnace sliding systems
  • Ladle purging plug installations
  • Electric arc furnace roof components
  • Steel processing equipment linings

Petrochemical Industry

  • Cracking furnace tube supports
  • Hydrocarbon processing reactor linings
  • Catalyst regeneration systems
  • High-temperature pipeline supports
  • Thermal oxidiser components

Advanced Ceramics & Electronics

  • High-temperature kiln furniture
  • Electronic component firing supports
  • Advanced ceramic sintering systems
  • Technical ceramic production equipment
  • Precision firing chamber linings

Advanced Manufacturing Process

1

Raw Material Selection

Premium industrial alumina and high-purity zircon concentrate sourcing with strict quality specifications

2

Precision Mixing

Computer-controlled batching and homogeneous mixing of raw materials with optimised particle size distribution

3

High-Pressure Forming

Machine pressing at high pressures to achieve optimal density and dimensional accuracy

4

Controlled Drying

Regulated moisture removal in controlled atmosphere chambers to prevent cracking

5

High-Temperature Sintering

Precision firing at 1650-1700°C in tunnel kilns with controlled thermal profiles

6

Quality Verification

Comprehensive testing including dimensional inspection, physical properties, and chemical analysis

Quality Certifications & Standards Compliance

ISO 9001:2015

Quality Management System Certification

ASTM C545

Standard Classification of Zircon Refractories

ASTM C467

Standard Classification of Mullite Refractories

JIS R 2611

Japanese Industrial Standards for Refractory Bricks

DIN 51060

German Standards for Refractory Materials Testing

GB/T 2997

Chinese National Standards for Dense Shaped Refractory Products

Frequently Asked Questions

What makes alumina-zirconia mullite bricks superior to conventional refractory materials?

Our alumina-zirconia mullite bricks combine the thermal stability of mullite with the exceptional corrosion resistance of zirconia. This unique composition provides superior thermal shock resistance, higher operating temperatures up to 1800°C, and excellent chemical stability compared to traditional alumina or silica-based refractories. The zirconia content significantly enhances resistance to alkali and glass corrosion.

How do these bricks perform in rapid temperature cycling applications?

Our mullite-zirconia bricks exhibit exceptional thermal shock resistance due to their controlled thermal expansion characteristics and optimised microstructure. The mullite phase provides dimensional stability whilst the zirconia component enhances crack resistance. This makes them ideal for applications involving frequent heating and cooling cycles, such as glass furnace campaigns and steel processing operations.

What quality assurance measures ensure consistent product performance?

Every batch undergoes comprehensive testing including chemical analysis, physical property verification, and thermal performance evaluation. Our ISO 9001:2015 certified quality management system ensures compliance with ASTM, JIS, and DIN international standards. Advanced testing equipment validates bulk density, porosity, compressive strength, and thermal properties before shipment.

Can these bricks be customised for specific industrial applications?

Yes, we offer extensive customisation options including modified chemical compositions, specialised shapes, and tailored dimensions. Our technical team works closely with clients to optimise brick specifications for specific operating conditions, temperature requirements, and chemical environments. Custom formulations can be developed for unique industrial applications.

What is the typical service life in high-temperature industrial applications?

Service life varies depending on operating conditions, but our alumina-zirconia mullite bricks typically demonstrate 20-30% longer service life compared to conventional refractories in glass furnace applications. In steel industry applications, they often exceed 12-18 months of continuous operation. The exceptional thermal stability and corrosion resistance contribute to extended campaign life and reduced maintenance costs.

Ready to Enhance Your Industrial Operations?

Contact our technical specialists for detailed specifications, custom solutions, and professional consultation on your high-temperature refractory requirements.

Technical Sales

+86 19171489999

Company

Hubei Zhongnai New Material Technology Co., Ltd.

Website

en.hbznxc.com