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Rath Incorporated offers a broad line of high purity refractory materials suitable for crystal growth and glass melting processes up to 1850°C. Rath Incorporated materials are made using the highest quality synthetic raw materials, ensuring the lowest possible level of impurities. These raw materials and other special processing result in excellent resistance to the highly corrosive environments and atmospheres experienced in these processes. The Rath Incorporated line includes dense refractories, insulating refractories, and fiber-based insulation.

Dense Alumina Refractory Grades

Korrath K-99

• >99.5+% purity, with low silica content, 196 lbs/ft³, available in pressed or cast shapes

Korrath K-91

• High Purity Mullite bonded alumina, with excellent thermal shock resistance, 180 lbs/ft³

Insulating Alumina Refractory Grade

Porrath FL34-15

• Bubble alumina, ASTM Grade 34 Insulating brick, > 99.5% purity, low silica content, 95 lbs/ft³ standard density, good thermal shock resistance, available in densities up to 125 lbs/ft³

Alumina Fiber Grades

KVR

• Vacuum formed 98% alumina fiber grade, organic free, available in various densities from 15 to 90 lbs/ft³
• Boards, cylinders and other shapes are available

ALTRA® MAT 97

• 97% alumina fiber, polycrystalline, with very low shot content
• Available in mat (3.5, 5 and 6 lbs/ft³) and edge grain strip module (6 to 10 lbs/ft³ density) forms

Mullite Fiber Grades

KVS

• Vacuum formed, 80% total alumina content, no free silica, organic free, maximum thermal shrinkage resistance up to 1800°C, available in various densities from 15 to 90-lbs/ft³
• Boards, cylinders and other shapes are available

ALTRA® MAT 72

• Mullite (72% alumina) fiber, polycrystalline, with very low shot content
• Available in mat (3.5, 5 and 6 lbs/ft³) and edge grain strip module (6 to 10 lbs/ft³ density) forms
• Best fiber in resistance to thermal shrinkage

Contact us or visit Rath Incorporated to learn more about our customized solutions.