Materials Literature
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The interface between hematite (a-Fe2 O3) and ilmenite (Fe II TiO3), a weak ferrimagnet and an antiferro- magnet, respectively, has been suggested to be strongly ferrimagnetic due to the formation of a mixed valence layer of Fe 2? /Fe 3? (1:1 ratio) caused by compensation of charge mismatch at the chemically abrupt bo…
The dynamics of local dissolution of chromium-nickel steels in 0,1 mol/l NaCl solution under galvanostatic polarization is investigated. It is shown that methods of mathematical modeling can be used to get additional characteristics of pitting corrosion. The analytical and simulation models which describe the electroc…
This paper reports result obtained by analysis of UV-Visible absorption spectra of Polymer Dispersed Cholesteric Liquid Crystal (PDCLCs) solution. The PDCLC solutions of different concentration were prepared using Methyl Methacrylate (MMA) and Cholesteryl Pelargonate (CP). We know that pure CP shows high degree of abs…
We have used the Vienna ab-initio Simulation Package (VASP) to study the electronic and optical properties of ordered defect compounds (ODC's) CuIn5Se8 and CuIn3Se5. The supercells are generated with the parent chalcopyrite structure of CuInSe2. The defect pair ð2V � þ In 2þ Cu Þ in CuInSe2 plays an important role in…
NiTi alloy is well- known shape memory alloys and has been widely used for bio-medical, mechanical and electrical applications. In this study, a Ni - rich porous NiTi alloys are produced by powder metallurgy technique. Three samples of these alloys were cooled in three media: furnace, water, and ice bath. X-ray diffra…
ABSTRACT The compressive strength is one of the basic parameters to control and characterization of cement. According to the NBR 7215 [1], the standard test procedure for determination of compressive strength of cement speci-fies the use of sand with a specific gradation and establishes specific rules for the preparat…
In this paper, we proposed a method to analyze the electric fleld distributions of the flve-layer planar optical waveguide structure with nonlinear metamaterial guiding fllms. The proposed nonlinear metamaterial planar optical waveguide is composed of two difierent kinds of media. One is the Kerr-type nonlinear metama…
Cr(III) and Cu(II) complexes (1–6) of general composition M(HL)X2 and M(HL)2 (M=Cr(III), Cu(II), X=Cl-1, NO3-1) with ligand 4(phenylamino) benzoic acid (HL1) were synthesized. The characterization of newly synthesized ligand and complexes was done by 1H NMR, UV–VIS, IR, Mass spectrophotometry and molar conductivity st…
Background. The properties of block Jacobi matrices corresponding two-dimensional moment problem are studied here. We introduce polynomials of the second kind similar to the corresponding polynomials of the second kind corresponding classical Hamburger moment problem. In a previous publication we orthogonalize two-ind…
Flavonoids are an important class of secondary metabolites widely distributed in plants. The majority of naturally occurring flavonoids are found in glucosylated form. Glucosyltransferases are enzymes that enable transfer of glucose from an activated donor (UDP-glucose) to the acceptor flavonoid substrates. A flavonol…
In the present work, Al2O3-CeO2 composite nanopowders were synthesized via co-precipitation method. The sinterability of the synthesized powders was investigated. The results showed that the transformation of transition phases of alumina to α-Al2O3 takes place at 1200 °C. TEM images showed that the powders was compose…
SUMMARY We investigate the origin of non-ideal transfer characteristics in graphene-based three-branch nano-junction (TBJ) devices. Fabricated graphene TBJs often show asymmetric nonlinear voltage transfer characteristic, although symmetric one should appear ideally. A simple model considering the contact resistances…
The reaction between Gd2O3(s) and Cl2(g) was studied in a high-resolution thermogravimetric system. The reaction product was GdOCl, which was the unique solid phase produced in all the temperature range studied. The GdOCl is subsequently chlorinated producing GdCl3 for temperatures above 1123 K. The system is under ch…
A rigorous numerical simulation was used to ascertain the quantitative characteristic properties of highly local heating kinetics in semiconductuctors and dielectrics by means of near-field coaxial probes. The heating-up rate and locality are shown to be drastically increased, as the cross-section of the point in thes…
The steel industry constantly faces the challenge of developing new and better steels for diverse needs, on of this necessities is the use of structural steels with higher corrosion resistance to marine atmospheres and improved mechanical properties than those that currently exist. Therefore, it is necessary to system…
In this paper, a simple hydrothermal method was developed for the preparation of micro-nanocomposite rGO/Ag/AgBr using ascorbic acid as a reducing agent. It could completely decompose 1 L 5mg - RhB under 250W UV light irradiation within 160 min. The catalytic activity was discovered to be strongly affected by the some…
Personal care products (PCPs) are among the most commonly detected compounds in surface water. PCPs have used large amount of metal and metal oxide nanoparticles (NPs). In the present study an attempt was made to study the bioaccumulation and biochemical constituents changes in gill tissues of a freshwater fish labeo…
In this study, two series of superconductor compounds with starting composition T10.9Bi0.1Sr2-xCexCa0.9Y0.1Cu1.99Fe0.01O7-o (x = 0—0.20) and T10.9Bi0.1Sr1.8Yb0.2Ca1.xCdxCu1.99Fe0.01O7-o (x - 0-0.4) ceramics were prepared using the conventional solid state synthesis method to elucidate their physical properties. For Ce…
Energy losses inherent to the conversion of sunlight to electricity in solar cells are mainly due to the so-called spectral mismatch: low energy photons are not absorbed while the energy of high energy photons is only partly used by the solar cell. The losses can be significantly reduced by adapting the solar spectrum…
The effect of fabrication routes on the micro- structure, the dielectric and ferroelectric properties of the Mn-doped BaTiO3 ceramics was systematically studied in the present study. It can be concluded that the ways of doping manganese into BaTiO3 matrix had a strong impact on the obtained ceramics. Doping manganese…