ZIRCAR Ceramics’ Alumina-Silica Type ASQ-20 is a premium-grade, medium-density combination of shot -free refractory ceramic fibers (RCF) and high-purity inorganic alumina binder. Initially designed for use as baffles and spacers in injection nozzles on SCAL thin-strip casters, ASQ-20 exhibits low density and low thermal conductivity. ASQ-20 exhibits good hot strength and resiliency making it virtually immune to thermal shock and changes in molten aluminum head pressure. As its alumina binder is uniformly distributed ASQ-20 is machinable to very well controlled dimensional tolerances. When used in contact with molten aluminum it does not require a coating of Boron Nitride. Its fine colloidal alumina particles also make it suitable for use as a glass slumping and fusing mold.
ASQ-20 is pre-fired contains no organic binders and will produce no smoke or odors when heated. ASQ-20 shows excellent resistance to chemical attack and is not affected by oil or water. It is, however, affected by hydrofluoric acid, phosphoric acid and strong alkalis.