Zircar Refractory Composites, Inc

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

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

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.

• 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)
• Al2O399+

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.

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