Zircar Refractory Composites, Inc

• Country of OriginIndia
• SizeMultisize
• TypeMetal Sheets
• MaterialMetal
• SeriesRSLE-57
• Room Temp. to 800°C(1472°F)0.3 x 10-6/°C
• Density, g/cc(pcf)1.4(90)
• Length0.1

General Info ZIRCAR Refractory Sheet Type RSLE-57 is a low expansion high strength reinforced silica matrix composite . This remarkable material was designed for use as a high strength insulator in induction hot press applications w. RSLE-57’s very low thermal expansion coefficient and high hot strength combine to give it thermal shock resistance not found in other structural ceramic matrix composite materials. RSLE-57’s 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 (2192°F) in an oxidizing atmosphere and permits its use with rapid variation in temperature in that zone. Beyond 1200°C (2192°F) it transforms into a crystalline structure and becomes brittle. If the exceeded temperature is only localized, the material still retains its original high strength properties. RSLE-57 also exhibits exceptional non-wetting properties when used in contact with molten aluminum making it useful in numerous molten aluminum contact applications. RSLE-57 is 100% organic free and contains no refractory ceramic fiber. It is readily machined to precision tolerances with conventional tooling. ZIRCAR Refractory Composites, Inc. (ZRCI) has developed a new material for the production of diamond segments that is far superior to all other high temperature, high pressure insulation. It has proven to be the best insulation material for Dr. Fritsch as well as other diamond segment sintering machines. ZIRCAR Refractory Sheet Type RSLE-57 is an integral part of the production of hot pressed diamond segments. It is used as a separator to electrically and thermally insulate a metal frame from a graphite pack. It will see in excess of 1000°C (1832°F) with several thousand pounds per square inch compression without any surface deformation. 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 requires a material with superior hot strength at temperatures as high as 1200°C (2192°F). 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 andinduction heating applications. This thermal stability also helps to increase the life of the graphite. RSLE-57 will last many times longer than any calcium silicate, mica, asbestos or other hot press insulation, as well as produce a better segment. This will save you time, money, and leave you with less waste material to dispose of. The majority of diamond segment manufactures in the US, Europe, India and South America has started using our material. They have stated that it will last 10 to 20 times longer in their most demanding hot presssintering applications. Properties Other unique properties of RSLE-57 are: A low thermal conductivity. An excellent electrical insulation. A high chemical purity. An excellent resistance to corrosion (from molten metal and glass)

• SeriesRS-99-45
• RT-400°C(752°F)(4 x10-6/°F)
• Thermal Expansion,7.0 x10-6/°C
• 427°C(800°F)0.27 (2.00)
• Modulus of Rupture**, MPa(psi)5.00(730)

ZRCI Refractory Sheet Type RS-99-60and RS-99-45 are comprised of 99% alumina. These “All-Alumina” materials are strong, uniform, rigid, refractory structure composed of alpha alumina fibers and high purity inorganic binders. Type RS-99-60 and RS-99-45 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 power metal and MIM furnaces with H2 atmospheres. They also have high electrical resistivity at elevated temperatures allowing them to be used in direct contact with resistance heating elements. They exhibite superior hot strength and dimensional stability to 1650°C (3000°F). RS-99-60 has a density of 60 lbsft³ (1 gmcc) and RS-99-45 has a density of 45 lbsft³ (.72 gmcc) ZRCI Refractory Sheet 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. These materials are fabricated as true composite laminates. They can be constructed into near net complex shapes. They can also 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.

• Al2O399+
• ColorWhite
• Specific Heat, BTU/lb°F (J/kg°K)0.25 (1047)
• RT- 1000°C (1832°F) RS-99R7 x 10-6 /C (5 x 10-6/F)

ZIRCAR Refractory Sheet Type RS-99 is a high density fiber based ceramic material with greater than 99% alumina purity. Type RS-99 has strength equal to asbestos cement and therefore is an excellent replacement for asbestos cement materials. Refractory Sheet Type RS-99 is usable to temperatures of 1650°C (3002°F) and is able to withstand over 500 hours continuous submersion in molten aluminum at 750°C (1382°F) with no wetting and no degradation in properties. Type RS-99’s high alumina content is ideal for high vacuum, reducing atmospheres, and other applications where silica cannot be tolerated. Refractory Sheet RS-99 boards are available in four types: Type RS-99M is a plastic highly moldable sheet ideally suited for forming custom geometries. Type RS-99W boards can be moistened with water and molded into any desired shape. After low temperature bake-out of 300°C (570°F) boards are unaffected by moisture. Type RS-99R boards are prefired and are unaffected by moisture. They stay rigid even if saturated with water.

• SeriesRS-101
• Al2O365
• Density, kg/m3 (pcf)1600 (100)
• Maximum Use Temperature* C (F)1260 (2300)

ZRCI Refractory Sheet Type RS-101 is a ceramic fiber reinforced structural alumina product with useful properties to 2300°F (1260°C). It retains strength and utility to levels far exceeding maximum use temperatures of reinforced plastics and asbestos-cement replacements. Type RS-101 not only makes an excellent replacement for rigid asbestos containing products, but also may be employed at much higher temperatures as well. Type RS-101 is 100% inorganic, non-flammable and contains no asbestos. Its high Al2O3 content makes it resistant to many environments including no outgassing on heating, is not brittle, and may be cut and machined with standard tooling. Type RS-101 is available in standard and custom size cylinders. Refractory Sheet Material is available in board form as Refractory Sheet Type RS-100 Properties *Maximum use temperature is dependant on variables such as stresses, both thermal and mechanical, and the chemical environment that the insulation experiences. ** Properties expressed parallel to thickness.