TEMPERATURE TRENDS OF THE PERMITTIVITY IN COMPLEX OXIDES OF RARE-EARTH ELEMENTS WITH PEROVSKITE-TYPE STRUCTURE

TEMPERATURE TRENDS OF THE PERMITTIVITY IN COMPLEX OXIDES OF RARE-EARTH ELEMENTS WITH PEROVSKITE-TYPE STRUCTURE

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Ceramic materials based on complex oxides with both the perovskite structure (Ln2/3Nb2O6) and the structure of tetragonal tungsten bronze (Ba6-xLn8+2x/3Ti18O54) have been investigated over a wide frequency and temperature ranges.The results obtained for certain structures denote the presence of the temperature anomalies of dielectric parameters (ε, tanδ).These anomalies occur over the wide frequency range Two-Piece Knit Bottoms including submilimeter (SMM) wavelength range, and are related neither with the processing peculiarities nor with the presence of the phase transitions.

Temperature behavior of Cyclist Accessories - Helmets - BMX the permittivity has been considered in terms of the polarization mechanism based on the elastic-strain lattice oscillations.It has been assumed that the observed anomalies could be ascribed to a superposition of harmonic and anharmonic contribution to lattice oscillations that determines τε sign and magnitude.