Microwave absorbing properties of modified solid solutions based on bismuth ferrite and lead ferroniobate with different thermodynamic background

In this work, the microwave absorbing and resonance properties of solid solutions based on BiFeO3 and Pb(Fe0.5Nb0.5)O3 modified with GeO2 have been studied. The choice of these systems is justified by the high microwave absorbing properties of the components separately and the prospects of their applications in microwave technology. A method for studying cylindrical material samples on a microstrip line using a network analyzer is briefly described. The measurements were carried out in the frequency range of 300 kHz - 26.5 GHz. For measurements, 3 series of samples were prepared using different process conditions, 3-5 samples in each. This was necessary for collecting statistics. Studies have shown that with an increase in the porosity of the material, its radio-absorbing properties increase. In addition, the height of cylindrical samples does not qualitatively affect their properties, which will greatly facilitate the preparation of new samples for research. Materials with a high concentration of lead ferroniobate have high radio absorbing properties. The results obtained will help in the development of materials with controlled microwave absorbing properties for applications as microwave absorbing coatings, microwave substrates, resonator and filter materials.