COMPOSITIONS BASED ON ALKALINE EARTH TITANATES AND / OR RARE EARTHS AND THEIR PREPARATION

摘要

The invention relates to compositions based on titanate and at least one constituent element chosen from rare earths or alkaline earths. BR/ The molar ratio of titanium to the sum of the constituent elements is greater than 1.1, if these elements are alkaline earths or greater than 1, if these elements comprise a rare-earth element. BR/ These compositions consist of particles whose surface is deficient titanium. The compositions are obtained by a process in which a TiO 2 sol is mixed with the constituent elements. The mixture is dried and the dried product is calcined. The compositions thus prepared are phasically pure. / P