Synthesis of lanthanum aluminate by reverse chemical precipitation using pseudoboehmite as alumina precursor

Lanthanum aluminate was synthesized by using reverse precipitation. A lanthanum nitrate salt in solution allowed the precipitation of lanthanum hydroxide onto the surface of the pseudoboehmite particles. Pseudoboehmite was previously synthesized out of aluminum sulfate which after characterization presents a poor crystallized structure. A Perovskite-type lanthanum aluminate was obtained at different temperature and calcination time. When calcination was set up to 1500°C to 3°C/min pure, high crystallinity and highly agglomerated lanthanum aluminate is obtained, relative density of 94% was reached. •Lanthanum aluminate was synthesized by reverse precipitation out of pseudoboehmite.•Pseudoboehmite proved to be an advantageous lanthanum aluminate synthesis precursor.•A mechanism of formation of lanthanum aluminate is proposed.