The Effect of Atmospheric Ionization on Oxygen Diffusion in Polycrystalline Ferrites under e-Beam Irradiation

It is shown that activation of the process of oxygen diffusion in polycrystalline lithium-titanium ferrites heated by a beam of high-energy electrons in the range of temperatures 873–1173 K occurs due to two factors: gas medium ionization by an e-beam and acceleration of diffusion processes directly in the matrix in the irradiation field.     

Temperature Dependences of the Electrophysical Parameters of a Li–Ti Ferrite

Temperature dependences of real and imaginary parts of the complex permeability of a Li–Ti ferrite were obtained by measuring its capacitance and total electrical conductivity by the bridge method at temperatures lying in the range 77–500 K. The measurements were carried out at a frequency of 1 MHz and a standard signal voltage of 250 mV. Dipoles of two types are identified. The static permittivity, activation energy, and pre-exponential factors characterizing the reorientation time constants of each dipole and also of the quantities describing the charge-carrier transfer in an electric field are estimated by the method of regression analysis of the obtained dependences.     

Formation of Structural-Phase States in Alumina Ceramics VK-95 by Sintering in a Constant Magnetic Field

Russian Physics Journal -     

Structural Organization of Nanocomposite Crystals

Russian Physics Journal - A possibility of simulating the structure of real nanomaterials in the elliptical Riemannian space is discussed. It is shown that the experimentally determined parameters...     

Surface Modification of ZrO2–3Y2O3 with Highintensity Pulsed N2+ Ion Beams

Russian Physics Journal -     

Formation of Microstructure of Lithium-Titanium Ferrite during its Synthesis in a 2.4 MeV Electron Beam

Russian Physics Journal -     

Interaction of lithium-titanium ceramics with air during sintering

Interaction of lithium-titanium polycrystalline ferrites with ambient air during their sintering is investigated using the methods of electroconductivity and thermal gravimetry within the temperature interval T = 600–1300 K. It is found out that the temperatures exceeding T = 1100 K correspond to effective course of reducing reactions in this material, which results in the formation of an oxygen-deficient ceramic structure in the stage of isothermal tempering (T = 1280 K). It is shown that in the final cooling stage the process of exchange of the ferrite ceramics with the ambient atmosphere exhibits a pronounced oxidative character. The role of these redox processes in the formation of the oxygen non-stoichiometry of the sintered specimen and the depth of its distribution are analyzed. __________ Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 2, pp. 35–40, February, 2007.     

The Influence of High-Energy Krypton Ion Implantation Temperature on Structure and Properties of Ni–Ti Alloy

Russian Physics Journal - The influence of the temperature of implantation of Ni–Ti shape memory alloy with 84Kr15+ions at the energy E = 147 MeV on its structural-phase state is...     

Influence of the Increase in Temperature on Electrical Resistance of YBCO

Russian Physics Journal - Electrical resistance of YBa2Cu3Oy was measured in the temperature range 77–1000 K. Based on the analysis of X-ray characteristic energy dispersive spectra, a...     

Hole Localization in Thallium Nitrate (I)

Russian Physics Journal - Using the EPR method, an identification of paramagnetic centers formed in TlNO3 under γ-irradiation at 77 and 300 K is performed. Their spectral characteristics,...