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High-purity Alumina Kiln Furniture and Specialty Refractory

Industrial ceramics produced in the USA for use in high-temperature thermal processing.

Sunrock Ceramics is a Chicago-based manufacturer of high-purity alumina kiln furniture and specialty refractory used in high-temperature thermal processing. Our products are used in a variety of industries, including:

Technical ceramics

Specialty glass

Powder metallurgy

Investment casting


Other products

Sunrock Ceramics emphasizes the highest-quality products, chemical purity, great customer service, fast turnaround times, and a wide selection of shapes and formulations to ensure the most economical system design for each application.

Sunrock Provides a Wide Range of Alumina Formations

Sunrock offers a range of alumina formulations for various applications. For example, we provide:

  • Up to 99.6% alumina for use in chemically reactive applications such as highly reducing powder metallurgy sintering and piezo ceramic production.

Sunrock’s formulations and production systems are designed to eliminate free silica in the ceramic body as you’ll see in the chart below. *The silica (SiO2) shown in the chart is present as a component of the mullite (Al2O3SiO2) and is not free silica.

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Properties of the HPA Family of
High Alumina Compositions

Sunrock has the Largest Assortment of Shapes

With an extensive library of existing tools, you’ll always find what you need.

Sunrock Ceramics produces a wide assortment of high-purity alumina shapes by pressing and thixotropic casting. High-performance presses are used with an extensive library of existing tooling. Sunrock’s tooling design allows for new shapes to be made with very reasonable tooling costs.


As a complement to pressing, thixotropic casting is used for complex shapes or lower volume production. Sunrock offers a cast formulation that is completely free of clay, meaning that cast shapes are as chemically pure as the pressed parts and have similar high-temperature hot strength.


Sunrock Ceramics Always Provides Fast Turnaround Times and Dependable Delivery for all High-purity Alumina Kiln Furniture

When you’re running a high-temperature firing operation, you need reliable, timely provider of refractory consumables. At Sunrock Ceramics, we focus fast turnaround times with dependable delivery scheduling. Since many plate sizes and sagger and setter shapes are stock items, we can make sure you get what you need on-time.


Kiln Furniture System Design Guidance

Your kiln furniture supplier should be a partner in developing the most economical design, taking into consideration the many inherent trade-offs involved. Please contact Sunrock to review and discuss design options for optimizing firing economics.

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