Aluminium-silicate ceramic materials are refractories characterized by an extremely high thermal shock resistance. There are different types according to the required applications. These products are used for the induction heat treatment of precious metals, for the construction of special furnaces at medium- or high-frequency, for the glass and the ceramic industries. In these materials are made: crucibles, continuous castings, furnaces components, supports, as well as a variety of tubes and plates and many other custom-made products.