On the basis of syntheses and studied mechanism of the aminquaternization reaction of the o xyethylmetacrylatspheron gels, which were preliminary chemically activated through catalist epoxiding and selective-amining, by guanidin chlorid, we received two types of macroporous anion exchanging sorbents with specified properties. We developed methods of the directed synthesis of the quarternized guanidin-aminospheron adducts with kinetically controlled buffer volume within 60-600 mg-eqv/pH*Gsorb. with the corresponding ranges of lineage, concentrating stationary of pH environment gradient according to the chlorid-anion, and efficiency (1600-4000 HETD) of the mixture separation of mineral acid anion through ionexchanging liquid chromatography.
The phase equilibrium in the quasi-ternary CdSe-Ga2Se3-SnSe2 system has been investigated using differential-thermal, X-Ray phase and metallography. Phase diagrams of four vertical sections, projection of the liquid’s surface and the isothermal section of the system at 670 K have been constructed. Any quaternary intermediate phases have not been observed in the system. Type and temperature of the respective mono- and invariant processes were established.
Optical characteristics of thin films on the base of pure and with V2O5 nanoscale paticles organic polymers poly-N-epoxypropilcarbazol (PEPC) and 3,6-di-Br-poly-N-epoxypropilcarbazol (3,6-di-Br-PEPC) were investigated. The photosensitivity range of PEPC and 3,6-di-Br-PEPC organic polymer films has been extended up to lmax=600 nm. The decrease of PL and electron absorption band intensity was recognized under condition of increased value of introduced nanoscale paticles for 3,6-di-Br-PEPC films with V2O5 nanoscale paticles. For PEPC films with V2O5 nanoscale paticles the decrease of of PL band intensity and increase of electron absorption band intensity were recognized.
The molecule of mercury dichloride (HgCl2) plays a dominant role in irradiative processes, which are passed in X-ray-sensitive materials. In the present paper there are made the experimental researches of polymeric stratums containing salt of heavy metals, in personally, mercury dichloride, quantum-chemical calculations of energy structure, potential surface of the basic, excited and ionisation state of mercury dichloride with the purpose of development of materials for recording high-energy including nuclear radiation.
The paper presents a new data on reflection and absorption and fundamental optics functions of thin films p-CuAgTe. The treatment of data by Kramers-Kronigs relations allowed to estimate the complete of fundamental optical constants: e1; e2 ePerpetuity; -Im e-1; n, k in the energy range 0.05-0.50 and 1.0-6.2 eV and make suppositions about the electrons transmissions from low-lying level to conduction zone. Also the effective mass of charge carriers, the lifetime of the plasma oscillations, the plasma energy and direct transition energy in between the zones was estimated.
It has been shown that features of the X-O bond IR vibration spectra in the (ÕÎ4)3- tetrahedron are dependent on two factors, the nature of the central atom and the symmetry in the vicinity of the group. The comparative analysis of IR spectra of (ÕÎ4)3- – vibrations for two types of the central atom, Õ = Ð or V, and for two types of crystals, apatites and calcium-vanadium (phosphorous) oxides has been performed.
From quazychemical modeling of high temperature equilibrium of defects at an annealing of cadmium telluride crystals the analytical expression for definition of partial pressure a cadmium pair, to meet the thermodynamic n-p-junction is obtained. Are constructed phase diagram of equilibrium, the conditions of materials formation of n- and ð-type conductivity with known carriers concentration are determined.
Ternary copper chalcopyrite compounds are promising material to produce absorbers layers of thin film solar cells.
A technique for producing CuInSe2 by selenization of Cu-In film in a non-closed system in the flux of inert gas is described. The data on specific and surface resistance, chemical composition, crystalline structure and phase composition, surface and cross-sectional SEM micrographs for metallic precursors and polycrystalline chalcopyrite film producing by this method are given.
The kinetics of an electron concentration at a vacuum annealing of n-PbTe films with taking into account the effect of residual oxygen was investigated. The important role of diffusion of tellurium atoms at evaporation from a near-surface layer and diffusion of tellurium vacancies from a surface in film’s volume was shown. The corresponding diffusion coefficients were estimated. The theoretical results are in agreement with the experimental data.
This article is devoted to fundamental approach in studying mesoscopic disordered media as the basis to complete structural material engineering.
Method of effectiveness producing radiation defects computation, based on cascades modeling of atomic collisions in many components targets by Monte-Carlo simulation, was development. Computation of dimensions individual cascades and transferred energy density for development role estimation of nonlinear effects in cascades of atomic collisions attached to ionic Y3Fe5O12 irradiation by heavy ions was made. Weighing of model computations with experiment data shows their satisfactory correlation.
The modification of resistivity of Bi2Se3, InSe i GaSe semi – conductors is investigated at them intercalation s-, d- and p-elements by different modes. On the bases of thermodynamic measurements is established that the observable localization of carrier of current has a different nature depending on a type of the material – host and “guest” component. The internal energy of electronic gas as exchange integral function is calculated in an assumption that intercalant operates as dielectric interlayer which dimerizes to charge carriers dynamic but doesn’t exchange layers.
Dependence of thermoelectric parameters from composite of solid solution PbTe-SmTe are investigated. Is proposed crystal quasichemical mechanism formation of solid solution, its defect subsystem analyses making.
Influence of symmetry elements of variance low on kinetic properties anizotropic crystals are shown. Represent exact method of determination of scattering mechanisms at the crystals by research of transverse Nernst-Ettingsgausen effect.
The distribution of temperature and Lukosh potential of thermoelectric anisotropic plate have been calculated. The arising of the transverse temperature difference and the cooling effect of one of the end face plate has been explained.
By the crystalloquasichemical method the analysis of probable mechanisms of solid solution formation in SnTe-InTe system is given. Is shown, that in SnTe crystal lattice the Indium atoms are in two charging states In+ and In3+.
The structures of distribution on thickness of effective and local value of electrical parameters as in p- PbTe, n- PbS epitaxial films, and in heterostructures on their basis p- PbTe / n- PbS are investigated. Are revealed directed to heterogeneity are connected from a defective subsystem of atomic structure. Is shown, that by method of epitaxial from a vapour phase are formed sharp n- p- heterojunctions.
In the article new views on a nature of the metals plasticity are stated. Their basis are ideas of instability. Using own researches and known experimental data was shown, that the reason of the metals plasticity is instability of a crystal lattice. On the two-dimensional model of the crystal it was shown that the crystal lattice of infinite size can be unstable under influence of small shear deformation in specific conditions. It was found that the reason of this are, the first, potential geometry of the interatomic interaction and, the second, magnitude of thermal energy of atoms. In case of using the spherically symmetric potential for computer modelling crystal lattice the repulsive forces arise between the atoms and their nearest neighbours, which balanced by the attractive forces between atoms and their secondary neighbours. Such crystal lattice is unstable, when its thermal energy atoms is zero or very small. The increase of thermal energy can change it to the stable one. The process of crystal stability breaking under the influence of external forces can be considered as the plasticity. The displacement group of atoms into position of lower potential energy is presented as the elementary stage of plastic deformation.
Is offered quasichemistry calculation of an equilibrium defects ñoncentration in crystals PbTe, doped tallium. On the basis of comparison of experimental datas with results of calculations is spotted equilibrium constants quasichemistry reactions for vacancies of a tellurium VTe2+) and unlattice tallium (Tli-).
The effect of iron diffusion coat is explored with the purpose of inspissation Plasma-Evaporation powder Ferri lactas on steel. Is shown, that the diffuse saturation by iron not only obturates, and refine near-layer field of the put coat.
The structural and optical properties of gallium nitride undoped films are explored. The type and concentration of imperfection in a solid is determined by technology method of growth. The luminescence is determined both the recombination processes with participation the energy states caused by intrinsic dît defects of lattice and annihilation of excitons and interband transitions.
The analisys of profiles interplanar distance modification procedure definition in surface layers of single crystals from double-crystall X-ray diffractometry datas. Is shown, that a minimum average square-law aberration, as the performance of theoretical and experimental diffraction curves hit rate, not always determines a substantial profile of interplanar distancea modification. The procedure of profiles Dd/d(z) definition and estimation as aproxymation by asymmetric gaussians is offered.
The structure transformation in 5-20 mm thick surface layer of a-Fe after processing by high-rate pulsed plasma was studied. The investigative methods: scanning electron microscopy with microanalysies, X-ray difractometry, Rutherford backskattering and elastic recoil detection analysies of protons were used. The features of surface relief formation, as well as modification of element and phase composition as function of pulse number were studied. It has been shown that plasma-detonation action is accompanied by transportation of the electrode material to the a-Fe surface. As a result of high-rate high-temperature heating, new phases FeMo and Fe7Mo6 are produced in the single-phase a-Fe. In addition, we have saturiation of the surface (-Fe layer by light elements (oxygen, carbon, nitrogen), penetration depth of which depends on the pulse number.
Rutherford backskattering and elastic recoil detection analysies of protons were used. The features of surface relief formation, as well as modification of element and phase composition as function of pulse number were studied. It has been shown that plasma-detonation action is accompanied by transportation of the electrode material to the a-Fe surface. As a result of high-rate high-temperature heating, new phases FeMo and Fe7Mo6 are produced in the single-phase a-Fe. In addition, we have saturiation of the surface a-Fe layer by light elements (oxygen, carbon, nitrogen), penetration depth of which depends on the pulse number.
The influence of vacuum annealing both on kinetics of change, and on structures of effective and local values electrical parameters of n- i p- PbTe epitaxial films, brought up with a vapour phase on chips (111) monocrystals BaF2 is investigated. In films with effective hole of conductivity takes place formations of two-layer p-n-structure, which parameters are determined in temperature and time of annealing. Is shown, that the dependences, which are observed, are possible to explain by evaporation chalkohen from a free film surface and by diffusion of his vacancies in normal direction to substrate in volume of film.
In work the phase structure of powders titan, nixrom, corrosion-proof steel and nikelaluminiy put by a plasma method on tooth artificial limbs was investigated. The study of phase structure before and after drawing was carried out(spent) with the help rentgenstructural of the analysis. Is shown, that the powders past through a plasma jet have not changed the phase structure and period of a crystal lattice.
The availability of a number of features, which is character for heterojunction CdS-Cu2S, has allowed creating the sensor of a new type for registration of an optical and X-ray image. The sensor can be used for registration of weak optical and X-ray images with next recording of their elements to a computer memory. The reading of an image is done by ²R -light. The sensor has effect of accumulation and memory.
It has been developed the consept of technological automated design engineering (ADE) system on the basis of test control in the submicron technology of large-scale integrated (LSI) circuits structures engineering. Its background is a minimization of multifactorial target function of functional layers presence defects.