HIGH TEMPERATURE SYNTHESIS OF ALUMINATES THROUGH FLAME AEROSOL PYROLYSIS

摘要

The invention relates to a method for producing aluminates of general formula (I): A1BxAl12-xO19-y, wherein A means at least one element from the group consisting of Sr, Ba, and La, B means at least one element from the group consisting of Mn, Fe Co, Ni, Rh, Cu, and Zn, x means 0.05 to 1.0, and y means a value that is determined by the oxidation states of the other elements, comprising the following steps: (i) providing one or more solutions or suspensions containing precursor compounds of elements A and B and a precursor compound of aluminum in a solvent, (ii) converting the solutions or suspensions or the suspensions into an aerosol, (iii) introducing the aerosol into a directly or indirectly heated pyrolysis zone, (iv) performing the pyrolysis, and (v) separating the formed particles containing hexaaluminate of general formula (I) from the pyrolysis gas.