Fire Clay / High Alumina Bricks

Fire Clay / High Alumina Bricks: Superior Thermal Stability

Fire Clay Bricks

Axim’s fire clay bricks possess mechanical strength and can be subjected to extreme thermal cycling and thermal shock. Fire clay bricks also have a high thermal mass which ensures they retain heat and provide excellent energy efficiency.

Fire clay bricks are made by firing a clay based composition until partly vitrified and for specialist applications can also be produced with a glazed finish. Normally fire clay bricks contain 40-50% alumina depending on the maximum operating temperatures. 

High Alumina Bricks

Axim’s high alumina bricks are produced with selected bauxite chamotte as main raw material, fired at 1450-1470℃ by advanced process with strict quality control.

High alumina bricks have great features like high temperature performance, great corrosion and wear resistance, high bulk density, low iron content, etc.


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Reliable Supplier of Fire Clay and High Alumina Bricks

Unlock unmatched durability and optimal thermal efficiency with Axim Mica, North America’s premier supplier of Fire Clay and High Alumina Bricks. Engineered for strength, these bricks withstand the most demanding thermal cycling and shock, ensuring longevity and energy efficiency in your high-temperature applications.

Boasting the largest inventory in the US and Canada, Axim Mica promises not just products, but solutions tailored to meet and exceed your expectations.

What Are Fire Clay Bricks?

In construction, where every element bears the weight of life and death, Axim Mica introduces its stalwarts: Fire Clay and High Alumina Bricks. These are not just bricks, but the very backbone of high-temperature resilience.

Fire Clay Bricks, born of the earth’s profound clay, are fashioned to confront the fiercest thermal cycles and shocks—much like a steadfast mountain enduring the seasons.

High Alumina Bricks, on the other hand, draw their might from the dense core of bauxite chamotte, standing undaunted in the face of extreme temperatures and corrosive battles, mirroring the resilience of a towering redwood.

Properties of Fire Clay Bricks

In the crucible of extreme environments, Fire Clay and High Alumina Bricks from Axim Mica showcase extraordinary qualities:

Thermal Cycling Endurance

Like the rhythmic change of seasons, these bricks withstand severe temperature variances with grace, ensuring stability and protection.

High Thermal Mass

Reminiscent of how a forest holds the day's warmth through the cool night, these bricks retain heat efficiently, maximizing energy use.

Mechanical Strength

As steadfast as ancient bedrock, they offer structural integrity under pressure, supporting the weight of heavy-duty applications.

Thermal Shock Resistance

With the resilience of a desert cactus surviving sudden downpours, our bricks resist damage from rapid temperature changes.

Chemical Inertness (High Alumina Bricks)

Mirroring a river's unyielding path through acidic soils, these bricks remain unaffected by most chemical corrosions.

Low Iron Content

Reduces the risk of contamination in processes requiring high purity standards.

Technical Parameters of Fire Clay and High Alumina Bricks

Fire Clay Bricks
High Alumina Bricks
Alumina Content (%)
Typically 30-45%
Maximum Service Temp (°C)
Up to 1400°C
Up to 1770°C and above
Thermal Conductivity (W/m·K at 1000°C)
Bulk Density (g/cm³)
Cold Crushing Strength (MPa)
Permanent Linear Change (%) (at 1400°C)
-0.5 to +0.5
-0.4 to +0.1
Thermal Shock Resistance
Good, withstands 10-15 cycles
Very Good, withstands 15-25 cycles
Refractoriness (°C)
> 1790
Chemical Resistance
Resistant to moderate acid and alkaline
Highly resistant to acid and alkaline
Iron Content (%)
< 2.5
< 2.0

How Fire Clay and High Alumina Bricks are Made

Selection of Raw Materials

The journey begins with the selection of premium raw materials. For Fire Clay Bricks, clays rich in kaolinite are chosen, while High Alumina Bricks rely on bauxite, known for its high alumina content.

Mixing and Forming

These raw materials are ground into a fine powder and mixed with water to form a pliable clay. This mixture is then molded into the desired brick shape, ensuring consistency in size and form.

Drying Process

Once shaped, the bricks undergo a drying process to remove most of the moisture. This step is crucial to prevent cracking during the firing phase.

Firing in Kilns

The transformation occurs in the kiln, where bricks are heated to temperatures between 1400°C and 1470°C. Fire Clay Bricks vitrify at lower temperatures, while High Alumina Bricks require higher temperatures to achieve their characteristic strength and stability.

Cooling and Finishing

Post-firing, bricks are slowly cooled to room temperature. This gradual process is essential to avoid thermal shock and potential damage. The final step involves quality checking and any necessary finishing touches before the bricks are ready for use.

This meticulously structured process, from raw material selection to the final quality check, ensures every brick meets the industry’s highest standards. With a focus on reliability and performance, these Fire Clay and High Alumina Bricks are crafted to offer unparalleled durability and efficiency in high-temperature applications.

Types of Fire Clay Bricks

The following are the common types of fire clay bricks you can use for your projects. Read on to see what type of projects you can apply them to:

Standard Fire Clay Bricks

These are the quintessential choice for most construction and industrial applications, providing solid thermal stability and resistance to moderate temperatures. Ideal for general use in kilns, furnaces, and fireplaces.

High-Duty Fire Clay Bricks

Specially formulated with an enhanced alumina content, these bricks are designed for increased mechanical and thermal resistance. Perfect for more demanding environments, where they face higher temperatures and more severe thermal cycling.

Glazed Fire Clay Brick

A unique option where aesthetics meet functionality. These bricks have a vitrified surface layer, offering not only an appealing finish but also added resistance against chemical attacks and easier cleaning.

Low Porosity Fire Clay Bricks

Engineered for environments requiring minimal moisture absorption and high density, these bricks boast reduced porosity. This makes them suitable for use in settings where superior mechanical strength and lower thermal conductivity are paramount.

Applications of Fire Clay Bricks

  • Construction of Kilns and Furnaces

    Ideal for high-temperature environments, fire clay bricks are commonly used in the construction of kilns for ceramics, glass, and metalworking industries, as well as in furnaces for heat treatment processes.

  • Fireplaces and Chimneys

    Their excellent heat retention makes them suitable for building fireplaces and chimneys, providing durability and maintaining warmth.

  • Incinerators

    Used in the construction of incinerators due to their ability to withstand high temperatures and thermal shock, ensuring longevity and safety.

  • Lining of Industrial Ovens

    Fire clay bricks are utilized for lining industrial ovens, where consistent temperatures and heat management are crucial for processes such as baking, drying, and curing.

  • Foundries and Smelting Operations

    Suitable for foundries and smelting operations, where their resistance to thermal shock and high temperatures helps in metal casting and processing.

  • Foundries and Smelting Operations

    Suitable for foundries and smelting operations, where their resistance to thermal shock and high temperatures helps in metal casting and processing.

  • Glass Manufacturing Furnaces

    In glass manufacturing, these bricks offer the needed thermal stability and heat containment, crucial for quality glass production.

  • Boiler Linings

    They are used in the linings of boilers to protect the structure from the heat generated during the combustion process.

  • Hot Blast Stoves

    Essential in the steel industry, particularly in hot blast stoves, where they provide thermal efficiency and stability.

Benefits and Advantages of Fire Clay and High Alumina Bricks

When it comes to refractory solutions, Axim Mica’s Fire Clay and High Alumina Bricks stand unfazed under extreme heat. Here’s how these robust materials can elevate your project’s performance and efficiency:

  • Enhanced Durability

    Both fire clay and high alumina bricks exhibit superior mechanical strength, standing up to wear and erosion in demanding environments.

  • High-Temperature Resistance

    High alumina bricks excel in extreme heat, while fire clay bricks provide robust performance in high-temperature applications, ensuring structural integrity.

  • Thermal Shock Resistance

    Fire clay bricks tolerate rapid temperature changes, with high alumina bricks offering even greater resistance, making them ideal for cyclic thermal conditions.

  • Chemical Stability

    High alumina bricks resist acidic and basic slags, whereas fire clay bricks offer dependable performance against chemical attacks, protecting structures in corrosive environments.

  • Energy Efficiency

    The substantial thermal mass of fire clay bricks aids in heat retention and distribution, while the specific composition of high alumina bricks minimizes heat loss, contributing to energy savings.

  • Versatility in Use

    Fire clay bricks suit a variety of general-purpose applications; high alumina bricks are tailored for more specialized, high-temperature environments, offering solutions across a broad spectrum of industries.

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Why Choose Axim Mica for Fire Clay and High Alumina Bricks

Selecting Axim Mica for your Fire Clay and High Alumina Brick needs comes with a multitude of compelling reasons:

Unmatched Quality

Leverage the benefit of bricks crafted from premium materials, ensuring unparalleled durability and performance in high-temperature applications.

Customized Solutions

Whatever your specific operational demands, Axim Mica offers tailored brick solutions, optimized for your unique application requirements.

Extensive Expertise

With decades of experience in the refractory materials industry, our knowledgeable team provides invaluable insights and support, guiding you to the most effective solutions.

Vast Inventory

Our wide range of fire clay and high alumina bricks, available in various compositions and specifications, ensures you find exactly what you need for your project.

Commitment to Sustainability

Consciously choosing materials and manufacturing processes that minimize environmental impact, Axim Mica contributes positively to sustainable operations and practices.

Customer-Centric Service

At Axim Mica, we prioritize our clients, offering timely responses, detailed consultations, and dedicated support from inquiry to delivery.

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About Axim Mica

Axim Mica stands at the forefront of supplying superior Fire Clay and High Alumina Bricks. Our commitment to excellence, rooted in over two decades of industry leadership, is shown through our premium materials and tailored solutions.

As North America’s #1 mica and insulation product supplier, we always prioritize quality, sustainability, and customer satisfaction.

Trust Axim Mica for your refractory needs, where innovation meets resilience.

Quality Assurance: ISO Certified Supplier

Axim Mica’s dedication to quality is underpinned by our ISO 9001:2015 certification, a testament to our rigorous quality management system.

This, coupled with strict adherence to compliance standards including RoHS, positions us as a leading supplier of refractory solutions.

We commit to delivering not only superior Fire Clay and High Alumina Bricks but also a partnership built on trust, excellence, and unwavering quality standards.

How It Works: Securing Your Refractory Solutions with Axim Mica

Step 1: Specificy Your Needs

Assess the specific requirements of your project, including the type of bricks (Fire Clay or High Alumina) and any particular specifications such as size, alumina content, or thermal resistance.

Step 2: Get in Touch

Reach out to us via our contact form on the website, email at, or by calling (516) 248-0045. Our team of experts is ready to help you choose the right product or tailor a solution to match your exact needs.

Step 3: Receive Your Custom Quote

After we've assessed your requirements and specifications, you'll receive a detailed quote that encompasses pricing, lead times, and any other pertinent details to ensure a seamless procurement process.

Frequently Asked Questions

High alumina bricks are utilized for their superior heat resistance, mechanical strength, and durability, making them ideal for structures exposed to high temperatures and aggressive chemical environments, like incinerators and kilns.

High alumina clay is a type of clay with a significantly higher alumina content, contributing to its enhanced thermal and chemical resistance properties.

High alumina bricks are considered neutral but lean towards being basic, making them resistant to acidic slags and environments.

Yes, high alumina is a type of ceramic material known for its excellent heat resistance, mechanical strength, and electrical insulation properties.

Fire clay bricks are refractory bricks made from clay that can withstand high temperatures, commonly used in kilns, furnaces, and fireplaces for their thermal stability and durability.

High alumina bricks contain a higher percentage of alumina (typically over 50%), offering exceptional heat resistance, making them suitable for very high-temperature applications. Fire clay bricks, with 25-45% alumina, provide good heat and thermal shock resistance, ideal for general-purpose high-temperature applications.

For more information or to discuss your specific needs, reach out to the Axim Mica team today.