 |
 |
||||||
[July 2004]
Refractory Sheet Cylinders
ZIRCAR Refractory Composites Inc (Florida, NY, USA) has announced the introduction of Refractory Sheet Type RSLE-501 Cylinders. These are low expansion, high strength reinforced silica matrix composites in a cylindrical form. The material has been designed for use as a high strength, durable insulator in induction heat treating applications.
ZIRCAR said that 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. The company claims for the product remarkable resistance to thermal shock up to 1200°C in an oxidising atmosphere which permits its use with rapid variation in temperature in that zone.
Beyond 1200°C, it will transform into a crystalline structure while maintaining its properties up to 1650°C providing that there is no significant fall in temperature. At temperatures above this, the material will exhibit surface glazing.
Advantages offered by RSLE-501 include low thermal conductivity, excellent electrical insulation, high chemical purity and excellent resistance to corrosion (from molten metal and glass). The sheet cylinder is also said to exhibit exceptional non-wetting properties when used in contact with molten aluminium.
RSLE-501 is 100% organic free and contains no refractory ceramic fibre. It is readily machinable to precision tolerances with conventional tooling.
www.zrci.com
ENDS