Single Crystal Growth of Aluminum substituted Strontium Hexaferrite SrFe12-xAlxO19

A. Yu. Starikov, D. A. Vinnik, S. A. Gudkova

Abstract


The paper presents the results of testing the technique for obtaining Al-substituted strontium hexaferrite SrFe12-xAlxO19 by spontaneous crystallization method. Using the scanning electron microscope JEOL JSM7001F equipped with an energy dispersive X-ray fluorescence analyzer INCA X-max 80 (Oxford Instruments), the chemical composition of the samples was established: for SrFe12O19 – 61,54%O, 35,53%Fe, 2,93%Sr; for SrFe12-0,67Al0,67O19 – 61,99%O, 33,27%Fe, 2,76%Sr, 1,98%Al.  A uniform distribution of iron, strontium and aluminum ions was detected. It was found that the samples obtained are monophasic. The crystal structure was studied by X-ray phase analysis using a Rigaku Ultima IV diffractometer. The crystal lattice parameters of the obtained sample are calculated for SrFe12-xAlxO19: a – 5,8792(8) Å; c – 23,011(3) Å; V – 688,83(13) Å3. The Curie temperatures were determined by differential scanning calorimetry: for SrFe12O19 – 450°С; for SrFe12-0,67Al0,67O19 – 435°С on the Netzsch 449C Jupiter.

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DOI: http://dx.doi.org/10.24892/RIJIE/20190106

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