Thermal synthesis and characterization of AlχLa1-χ P3O9

Abstract

New binary lanthanum-aluminum triphosphates were synthesized by thermal-condensation method from H 3 PO 4 , La 2 O 3 and Al(OH) 3 . These pigments could be potentially used as special inorganic pigments; their corrosion-inhibition properties were widely studied. Synthesis conditions were determined on the basis of DTA and TG measurements. The products were also characterized by X-ray diffraction analysis. Physical properties -density by pycnometric method, particle size distribution, oil number and critical pigment volume concentration (CPVC), pH and specific conductivity of their aqueous extracts were also determined.