SYNTHESIS OF NANOPARTICLES OF ALUMINIUM SUBSTITUTED CuxCo1-xFe2-2yAl2yO4FERRITE

Abstract

Nano-particle size polycrystalline aluminum substituted copper cobalt ferrite samples CuxCo1-xFe2-2yAl2yO4 (where x= 0.0, 0.2 0.4, 0.6, 0.8, 1.0 ; y = 0.05, 0.15 and 0.25) have been prepared by standard ceramic technique. The effects of aluminium and copper on structural properties of cobalt ferrite are studied. A universal testing machine as well as Archimedes's method was applied for determining the physical properties of the samples. Phase formation is investigated using X-ray diffraction, Infrared absorption technique and Scanning electron microscope technique. The Lattice constant ‘a’ of samples goes on increasing with Al3+ and copper content. The ratio c/a is found increasing when addition of copper content and decreases with aluminium content. It means that Al3+ and copper acquire the tetragonal prolate type distortions on B site and hence (c/a) ratio increases and automatically crystal lattice turned from tetragonal spinel to cubic spinel. The variation of tetrahedral metal oxygen bond length (A-O) and tetrahedral cationic radius RA decrease with increase of copper as well as aluminium content which suggest the occupancy of Cu2+ions at B site only.