Effect of the sintering temperature on the structural and magnetic parameters of strontium ferrites doped with kaolin and barium borate

This paper presents the results of studies of the effect of the sintering temperature of strontium ferrites (doped with 1.2 mass % kaolin and barium borate) on their properties. The fine crystalline structure of anisotropic and demagnetized strontium ferrites doped with kaolin was studied with the help of the Moessbauer effect. Fe-57 nuclei, occupying 4f2 and 2a octahedral positions, respectively, in the hexagonal and spinel blocks, have the highest magnetic fields and quadrupole shifts. The effect of the sintering temperature on the physical properties of the ferrites studied is linked to changes in the microstructure and porosity of the samples.