ZIRCAR Ceramics’ Alumina Type ZAL-45 is a high-density, high-strength, uniformly rigid refractory structure composed of high-alpha polycrystalline alumina fibers and high-purity inorganic binders. ZAL-45 exhibits a fine open-pore structure and is made to a high bulk density of 0.72g/cc (45pcf) which gives it a unique combination of high strength and low thermal conductivity at elevated temperatutures. ZAL-45 exhibits very good dimensional stability to 1650°C (3000°F) and withstands intermittent use to 1700°C (3192°F). ZAL-45 is manufactured with a high fiber-to-binder ratio making it highly machinable to precise dimensional tolerances. It exhibits high electrical resistivity with high microwave and RF transparency at elevated temperatures. ZAL-45 is pure white and exhibits high reflectance.
ZAL-45 is pre-fired contains no organic binders and will produce no smoke or odors when heated. ZAL-45 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.