ALL-ALUMINA COMPOSITES TYPES RSAA-240, RSAA-480, AND RSAA-720
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ALL-ALUMINA COMPOSITES Refractory Sheet Types RSAA-240, RSAA-480 materials composed of alpha alumina fibers and high purity inorganic binders. These materials have a high purity alumina bond making them well suited for use in high vacuum and reducing environments where silica cannot be tolerated, such as powder metal and MIM furnaces with Hydrogen atmospheres. They also have high electrical resistivity at elevated temperatures allowing them to be used in direct contact with resistance heating elements. They exhibit superior hot strength and dimensional stability to 1650°C These materials are fabricated as true composites. The homogeneous microstructure and consistent binder distribution allow this material to be machined to tight exacting tolerances with ordinary shop tools and equipment. Their superior machinability and dimensional stability plus low heat capacity make them ideal for use as setters, supports and process fixtures in both continuous and batch firing furnaces. They contain no organic binders and will not smoke or produce odors when heated. They show excellent resistance to chemical attack and are not affected by oil or water. They are, however, affected by hydrofluoric acid, phosphorous acid and strong alkalis. These low density fiber reinforced ceramic composites are available as boards, cylinders and custom shapes. They have a fine open pore structure, high porosity and low thermal conductivity. SUGGESTED APPLICATIONS • Primary thermal insulation in low mass furnaces and thermal process systems operating to 1650°C (3002T) • Thermal insulation, supports and process fixtures in Hot Isostatic Presses (HIP) furnaces and other thermal process systems operating to 1650°C (3002°F). • High temperature setters, supports and process fixtures. • Thermal insulation in bright annealing furnaces and other thermal process systems with hydrogen gas • Thermal insulation, supports and fixtures Solid Oxide Fuel Cells operating to 1550°C (2822°F). • Backup thermal insulation in furnaces and thermal process systems operating to temperatures exceeding • Launders, distribution boxes, pouring spouts, hot tops and others involving molten metal contact. • Electrical insulation in high temperature systems operating to 1550°C (2822°F). ZIRCAR Refractory Composites, Inc. Technical Data e-mail: sales@zrci.com This information, which is subject to change, is offered solely for your consideration and should not be taken as a warranty or representation for which we assume legal responsibility. It is not to be understood as permission or recommendation to practice a patented invention without a license and the user should determine whether relevant

Density, gm/cc(pcf) Modulus of Rupture**, MPa(psi) Thermal Conductivity, W/m°K(BTU/hr. ft2 °F/in) Linear Shrinkage*, % Dielectric Strength, Volts/mil ' Maximum use temperature is dependent on variables such as stresses, both thermal and mechanical, and the chemical environment that the material experiences. " Properties expressed parallel to thickness. 1 Properties expressed perpendicular to thickness. Custom boards, shapes and preparations are available on request. Our forming processes, large Inventory of custom tooling and state of the art machining techniques allow a wide variety of...