Preparation of Electromagnetic Radiation Absorbent Pigment Using Aluminium Ion Exchanged and Oxidation Processing in Clay Layers

Aluminium particles were synthesized on clay using two methods of ion exchanged and oxidation. The characteristics of the pigments were investigated by fourier-transform infrared spectra (FTIR), X-ray diffraction (XRD), thermal gravimetric analysis (TGA), scanning electron microscope (SEM), electron dispersive X-ray spectrometer (EDS), reflectance spectrophotometer (RS) and electromagnetic transition instrument (ETI). FTIR spectra showed generation of Aluminium and clay complexes into the clay interlayer. TGA result demonstrated an improvement in thermal stability of clay-Al pigments compared with untreated particles. SEM and EDX results showed that the aluminium aggregates are presented on the surface of clay. Aluminium particles also affected the electromagnetic properties of clay particles.