Research of the crystal structure of hexagonal isotropic polycrystalline ferrites SrFe12О19 obtained by radiation-thermal sintering

The functional characteristics of strontium hexagonal ferrites, widely used in instrument making, depend significantly on the technology of their production. The paper presents the results of studying the crystal structure of hexagonal isotropic polycrystalline ferrites SrFe 12 O 19 . The samples were obtained by radiation-thermal sintering (RTS) in a fast electron beam of the ILU-6 electron accelerator. The phase composition and crystal lattice parameters of the samples were controlled by X-ray diffractometry, the X-ray spectra were recorded on a DRON-8 diffractometer using Co K α 1 radiation, the density of the objects of study was determined on a UW620H electronic balance. It was found that the obtained single-phase samples are characterized by the P63/mmc space group (corresponding to the structure of hexagonal ferrite). For the synthesized samples, the dependences of the unit cell parameters and volume on the temperature and duration of sintering are given. The multidirectional nature of the change in the parameters of the crystal lattice is revealed, which indicates anisotropic distortion of the unit cell. It is shown that in RTS the sintering temperature plays a much greater role than the sintering time. The results obtained can be used to improve microwave electronics and terahertz photonics devices.