Mislimat Piralievna Faradzheva

• Peter the Great St.Petersburg Polytechnic University

The average sizes L¯i, and their dispersion Wi along the i-th axis, of crystallites in powders are used to determine X-ray diffraction sizes, Di XRD, averaged over crystallite columns within the BWA method. Numerical calculations have been carried out for an orthorhombic lattice of crystallites, such as LiFePO4, NMC, having a Lamé’s g-type superell...

The average sizes \ {\bar{L}}_{i\ } and their dispersion W_i along the i-th axis of crystallites in powders are used to determine the X-ray diffraction sizes, D_{i\ XRD}, averaged over crystallite columns within the BWA method. Numerical calculations have been carried out for an orthorhombic lattice of crystallites, such as LiFePO4, NMC, having Lam...

The peculiarities of current percolation in two-component structures (HTSC-MWNTs) depending on the concentration of components are established. It is established that at 20% nanopowder content there is an increase in the critical temperature of the TC transition to the superconducting state. Discusses the mechanism of destruction of the percolation...

The heat capacity of the nanocrystalline multiferroic BiFeO3 was studied in a wide temperature interval of 150–800 K. It was found that the heat capacity nanocrystalline of bismuth ferrite in the temperature range of 350–570 K is noticeably larger than that of the microcrystalline sample. It was shown that the temperature dependence of the excess h...

Results of the single-stage synthesis of nanocrystalline bismuth ferrite are presented. It is shown that the temperature and frequency dependences of dielectric properties of specimens produced by the cold compaction of the obtained powder substantially differ from those of microcrystalline bismuth ferrite produced using traditional ceramic technol...

A number of solid solutions Y(Ba1–хВех )2Cu3O7–δ are received by replacement of barium on beryllium in compound YBa 2 Cu 3 O 7 – δ , where х = 0 –1, with a wide spectrum of electric properties — from high-temperature superconductor (х ≤ 0,55) up to the semiconductor. Structures of these substances are isomorphic to the YBa2Cu3 O7–δ , at change of t...

We present the results from experimental (in situ) measurements of the electrical resistance and thermal expansion of stainless steels in the temperature range 300–1000 K. Based on a correlation analysis of these properties, the decisive role of the thermal deformation of the atomic lattice in the formation of the electron scattering cross-section...