Authors : Suresh. S. Darokar
Page Nos : 69-71
Description :
A new series of lithium hardferrite ( M- type ) with the substitution of aluminium and cobalt were synthesized with general chemical formula Li0.5Fe0.5+xAl12-2X Co xO19 (where x = 1,2,3,4 and 5) using reacting oxide by high temperature solid state reaction technique. The crystalinel characterization of compound has been carried out from X-Ray diffraction powder pattern. The compounds are in single hexagonal phase without traces of uncertainly ambiguous reflection. From XRD pattern lattice parameters has recorded with increasing doped aluminum element in the range from a = 5.807 Å to 5.906 Å and c = 22.507 Å to 22.585 Å pertaining the space group P63/mmc (No.194). The mass density of the ferrites were found linearly varies and depends upon the mass and volume of sample. The X-Ray density has depends upon the lattice constant and molecular weight of the compounds. The average particle size was also estimated.. work The electrical conductivity were studied and the values are obtained in the range 2.193 x 10-12 to 5.78 x 10-6 Ω-1cm for Li-ferrite.
Key words: Magnetoplumbite, electrical conductivity, Activation Energy.etc.
