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Cast & Fired Ceramics

Foundry Service offers a full line of technical ceramic products for a variety of industries and applications with operating temperatures up to 3400°F . Materials include Fused Silica and Fused Silica Foam (30 pcf to 130 pcf), Alumina, Mullite, Cordierite, Steatite, Silicon Carbide, Zirconia, and Aluminum Silicate (Lava). We have in-house slip casting and vibration casting operations and mold making capabilities. We offer cast and machined ceramic plates, tubes, rings, pins, kiln furniture, oven decks, kiln shelves, and parts molded or extruded according to customer supplied drawings. Foundry Service also offers grinding and machining services to support the many products we carry.

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Fused Silica (2500ºF+ Low Expansion Ceramic)

Fused Silica (2500ºF+ Low Expansion Ceramic)


Fused Silica properties include good thermal shock resistance, a thermal expansion coefficient close to zero and excellent mechanical properties at high temperatures, making Fused Silica refractory components particularly useful for very demanding applications. Additional properties include chemical stability and low electrical conductivity; although it should be noted that due to its physical structure use at temperatures exceeding 1000ºC is not possible for cyclic applications. Despite this, the material performs well in the refractory environment, often being used in components such as firing supports, ignition crucibles and dishes.
Fused Silica Foam-50 (2500ºF+ Low Expansion 50 pcf Insulating Foam Block)

Fused Silica Foam-50 (2500ºF+ Low Expansion 50 pcf Insulating Foam Block)


Fused Silica Foam-50 is characterized by a uniform open cell structure with excellent thermal insulating properties, exceptional resistance to thermal shock, and volume stability over a wide temperature range. The material is capable of being machined to close tolerances using standard carbide tooling. When faced with fused silica cement or other suitable mortars. Foam-50 can withstand moderate working face conditions including trough linings for molten aluminum, copper, and other non-ferrous alloys. Standard block size is 4.5" x 12" x 18" (other sizes by request). Fused Silica Foam-30 is also available from Foundry Service on a special order basis. Foam -30 is a 30 pcf version of ceramic foam.
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Alumina (Porous) (3200ºF - 3600ºF Range)

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Foundry Service offers Porous Alumina compositions from 88% to 99.7% alumina content. TA-530 is a nominal 90% alumina material that is excellent for molten metal contact, kiln furniture, and miscellaneous shapes. TA-530 combines high strength and thermal shock resistance yielding a versatile alumina product that is suitable in a wide variety of applications. TA-540 is a modified version of TA-530 that is best suited for miscellaneous kiln furniture. The higher content aluminas are excellent for use when silica content is critical. TA-505 is suitable for induction melting under vacuum due to a lower silica content while retaining thermal shock resistance. TA-507 is excellent for use in vacuum or hydrogen atmospheres due to the lowered ...
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Dense Ceramics - Alumina, Mullite, & Zirconia (3200ºF - 3600ºF Range)

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Fully Dense Porcelain, Mullite, Alumina, Zirconia, Silicon Carbide, and Tungsten Carbide are gas-tight high-fired ceramics capable of withstanding operating temperatures of 2550ºF (1400ºC) to 3182ºF (1750ºC). These compositions are available in the forms of extruded and cast tubing, rods, plates, fish spine beads, lab ware, and custom molded shapes.
Cordierite (2350ºF Plates, Discs, Posts, Kiln Furniture, and Custom Shapes)

Cordierite (2350ºF Plates, Discs, Posts, Kiln Furniture, and Custom Shapes)


Foundry Service’s kiln furniture is manufactured using superior quality body formulations, well regulated production and quality control procedures, and an exceptionally long and tightly controlled firing cycle. These procedures result in a finished product composed of 50% Cordierite and 35% Mullite, with lesser amounts of corundum and other combined mineralogical forms. Glassy phase and uncombined minerals are found in very minor or trace amounts. This combination of high Cordierite and high Mullite yields excellent mechanical properties and remarkably high resistance to thermal shock and warping. Foundry Service’s Cordierite is compatible with all makes and models of hobby and Industrial kilns. We offer over 200 stock sizes in ...
Steatite (1800ºF Low Porosity Ceramic - Cast & Extruded Parts)

Steatite (1800ºF Low Porosity Ceramic - Cast & Extruded Parts)


L3 Steatite is ideal for high frequency, low loss, and high voltage electrical insulation. Our L-3 Steatite has good mechanical properties and low loss electrical qualities. It is ideal for resistor forms, igniters, standoffs, surge arrestors, coil forms, spacers, spark plugs, etc. Steatite is easily fabricated to close tolerances and is much less expensive than alumina ceramic insulators. Typical parts produced from Steatite are cores, tubes, rods, spacers, resistors, bushings, insulating washers, standoffs, and custom molded parts.
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Silicon Carbide (2800ºF High Thermal Conductivity and Wear Resistant Ceramic)


Silicon Carbide has excellent resistance to corrosion, high mechanical strength, high thermal conductivity, a very low coefficient of thermal expansion, and better thermal shock resistance than alumina at very high temperatures. Silicon carbide is composed of tetrahedra of carbon and silicon atoms with strong bonds in the crystal lattice. This produces a very hard and strong material. Silicon carbide is not attacked by any acids or alkalis or molten salts up to 800ºC. In air, SiC forms a protective silicon oxide coating at 1200ºC and is able to be used up to 1600ºC. The high thermal conductivity coupled with low thermal expansion and high strength give this material exceptional thermal shock resistant qualities. Silicon carbide ceramics ...
Aluminum Silicate (Lava) (2000ºF+ Machine and Fire Ceramic)

Aluminum Silicate (Lava) (2000ºF+ Machine and Fire Ceramic)

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Grade "A" Lava is a natural ceramic material mined from the earth. In chemical terms it is a hydrous alumina silicate. We supply this material in standard rods, blocks, and plates as well as special machined shapes. Aluminum silicate (also known as Lava) is machinable in an unfired state and can be used in applications up to 1000º F. It is fairly soft and has fairly low mechanical properties in its unfired state. After firing, parts are almost as hard as carbide and can be used in applications up to 2100º F. The resultant fired ceramic exhibits high strength and a low coefficient thermal expansion, resulting in a material with good thermal shock resistance. Unfired “Grade A" Lava is an easy to machine material that can be shaped using most ...
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Foundry Service & Supplies, Inc. | Heat And Corrosion Resistant Industrial Insulation & Construction Materials