Synthesis of ferritic ceramics BaFe(11,9-х)Mn0,1TixO19 by solid-phase reaction

Barium hexaferrite is among substances that are used to create materials in the field of electronics and energetics. Its special magnetic properties are important: high coercivity, magnetic permeability, etc. Recently the scientific community has shown great interest in the block structure of this material, which is expressed in high publication activity. However, an exhaustive review of the structure and properties of barium hexaferrite substituted with manganese and titanium has not yet been presented. Exactly these alloying elements, according to theoretical justifications, should significantly modify the crystal lattice and the properties of the object under study. In this paper the objects of research are ferritic materials with the structure of magneto plumbite. The aim of the study is to obtain a substituted ferrite composition BaFe(11.9-x)Mn0.1TixO19, where x= 0.1, 0.5, and 1. In the course of the study the technology of obtaining the investigated material by solid-phase synthesis has been developed. It is shown that the optimal synthesis temperature is 1400 °C at an exposure time of 5 hours. The chemical composition was controlled by scanning electron microscopy with the function of microanalysis. It was also determined that the obtained ceramic samples had a large number of micropores, the average size of which was in the range of 5-50 micrometers. The lattice parameters of the synthesized material were evaluated using X-ray diffraction analysis. The nonmonotonicity of the change in the unit cell parameters was revealed. A correlation was established between the change in the Curie temperature and the increase in the concentration of alloying elements by differential scanning calorimetry.