SILICA COMPOSITES TYPES RSLE-57, RSLE-501 CYLINDERS AND RSLE-56 MOLDABLE
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SILICA COMPOSITES Types RSLE-57 Boards, RSLE-501 Cylinders and RSLE-56 Moldable ZIRCAR Refractory Composites, Inc. produces a comprehensive range of advanced high performance ceramic-ceramic composites and related products. Our materials are used around the world in demanding thermal, structural and electrical insulating applications at temperatures from 600°C(1112°F) to 1650°(3002°F). For over twenty-five years we have been a problem solver working with many industries to resolve their thermal management problems. We have developed materials that have become industry standards for induction melting, forging and heat-treating applications, investment casting, glass processing, hot pressing, as well as many high temperature electrical applications. ZIRCAR Refractory Sheet Type RSLE-57 is a low expansion, high strength reinforced silica matrix composite. Designed for use as a high strength insulator in induction hot press applications, it is ideal for any application which require a material with superior hot strength at temperatures as high as 1200°C (2192°F). Beyond 1200°C (2192°F) it begins to transform into a crystalline structure. RSLE-57 maintains its properties up to 1650°C (3002°F) providing that there is no significant fall in temperature. At these elevated temperatures, this material will exhibit surface glazing, but will retain its strength and integrity. RSLE-57’s exhibits a very low thermal coefficient of expansion (0.3 x 10 - 6 °C) which provides remarkable resistance to the thermal shock up to 1200°C (2192°F) in an oxidizing atmosphere and permits its use with rapid variation in temperature in that zone. RSLE-57’s very low thermal expansion coefficient and high density combine to give it thermal shock resistance not found in other structural ceramic composite materials. These properties give it much greater life in most hot pressing and induction heating applications. RSLE-57 also exhibits exceptional non-wetting properties when used in contact with molten aluminum, zinc, lead, tin and other non-ferrous metals, making it useful in numerous casting, RSLE-57 is an integral part of the production of hot pressed diamond segments. RSLE-57 is used as a separator to electrically and thermally insulate a metal ram from a graphite pack. It will see in excess of 1000°C (1832°F) with several thousands pound per square inch compression without any surface deformation. conveying, containing and forming applications. RSLE-57 is the ideal material for use as Dams, Spouts, Floats, Launders, Head Boxes, Baffles, Headers, Tips, Rings, Distribution Boxes, Stoppers, Basins, Snouts, Transition & Orifice Plates and Hot Top & Ingot Mold Liners. RSLE-57 is 100% organic free and contains no refractory ceramic fibers, (RCF’s). APPLICATION INFORMATION MACHINING GUIDELINES ZIRCAR Refractory Sheet Type RSLE materials exhibit a uniformly bound fine-pore structure. Thye can be machined to precision dimensional tolerances with conventional carbide tooling following the guidelines outlined below: Cutting Tool Circular Saw Blade, Carbide tipped, 10" diam. 24 teeth 4 Fluted Carbide End Mill ZIRCAR Refractory Composites, Inc. P.O. BOX 489, FLORIDA, NY 10921-0489 Tele: (845) 651-2200, Fax: (845) 651-1515 e-mail: sales@zrci.com Home page: http://www.zrci.com Rotation Speed 3450 1000-2000 Feed Rate 15-20 ft/min 15-20 ft/min Technical Data Bulletin No. ZRCI-201 July 2005 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 patents exist.

SILICA COMPOSITE MATERIALS ZIRCAR Refractory Sheet Type RSLE-501 is a low expansion high strength reinforced silica matrix composite in a cylindrical form. This remarkable material was designed for use as a high strength, durable insulator in induction heat treating applications. Type RSLE-501’s very low thermal expansion coefficient and high hot strength combine to give it thermal shock resistance not found in other structural ceramic materials. Type RSLE- 501 exhibits a very low coefficient of expansion (0.3 x 10-6 °C) which provides remarkable resistance to the thermal shock up to 1200°C...

SILICA COMPOSITE MATERIALS TYPE Nominal Composition, wt% SiO2 Other Metal Oxides Organic content Thermal Expansion, RT-800°C(1472°F) Density, gm/cc(pcf) Porosity, % Color Flammability Hardness, Durometer "D" Dry, at room temp. Charpy Impact Strength, ft-lb Compressive Strength**, MPa (psi), 2% consolidation as received Modulus of Rupture**, MPa(psi) as received 8 hrs. at 370°C(698°F) 8 hrs. at 1000°C(1832°F) Linear Shrinkage‡, % after 24 hrs. at 800°C(1472°F) after 24 hrs. at 1000°C(1832°F) Drying Shrinkage, % Length / Width Thickness Thermal Conductivity, W/m°K(BTU/hr. ft² °F/in)...

SILICA COMPOSITE MATERIALS Refractory Sheet Type RSLE-56 Moldable is a wet blanket shipped rolled up on a plastic tube, separated and wrapped in plastic. Type RSLE-56 Moldable can be shaped and molded prior to drying and firing, permitting the fabrication of complex shapes as well as flat sheets. To make a flat board: Open plastic covering and unroll the desired amount of RSLE-56 Moldable. Cut to size with a knife. Dry on a rigid glass, wood or metal plate seperated by a layer of plastic, cloth or paper. Dry at 1400F until dry. A 1/2'' thick sheet of RSLE-56 Moldable will dry completely in...