Ceramics based on aluminum titanate, process for their production and their use

Abstract

Ceramics having principal phases of aluminum iron titanate and mullite corresponding to the overall chemical composition: 50 to 62% by weight Al.sub.2 O.sub.3, 36 to 49.5% by weight titanium oxide, expressed as TiO.sub.2, 0.5 to 10% by weight SiO.sub.2, and 0.2 to 15% by weight iron oxide, expressed as Fe.sub.2 O.sub.3, up to 1% by weight impurities, with the sum of Al.sub.2 O.sub.3, TiO.sub.2 and SiO.sub.2 being 100%, wherein the sum of the crystalline phases Al.sub.2 O.sub.3, TiO.sub.2, SiO.sub.2 (other than the principal phases) is less than 6% by weight, based on the sintered body, are useful where a ceramic having a high thermal-shock-resistance is required, such as exhaust port liner internal combustion engines, for example.

Dependencies are inferred from the claim text.