Ceramics consists of inorganic non-metallic materials that are divided into earthenware, stoneware, porcelain, stoneware and special masses that are sparingly soluble in water and are at least 30% crystalline. The ceramic can be divided into clay and glass ceramic. The processing takes place in principle at room temperature from the molding of a raw mass and through subsequent temperature treatment of over 800 ° C. In some cases, the shaping even takes place via the fusible base with crystallization.
Bentonite is mostly used as an aggregate in small proportions in ceramics and gives lean masses special properties.