Materials Literature
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The aim of this paper is to introduce the use of the instantaneous phase-angle signature analysis as a tool for the diagnostics of mixed airgap eccentricity in operating three-phase squirrel cage induction motors. Firstly, a modelling and simulation study concerning the occurrence of airgap eccentricity in three-phase…
Results for a new 60 MHz plasma-enhanced chemical vapour deposition (PECVD) apparatus developed for roll-to-roll processes of polymeric substrates are presented. Using silicon organic precursors in an oxygen plasma, thin film properties could be varied from inorganic silicon oxide to siloxane plasma polymers by varyin…
Abstract A novel method for the analysis of clay minerals using Fourier transform infrared spectroscopy is presented. Clay mineral suspensions are dried on a Si wafer substrate for transmission infrared (IR) analysis. Four natural Source Clays from the Source Clays Repository of The Clay Minerals Society, SWy-2, SAz-1…
A synthetic protocol using DNA as a biocatalyst has been described to electrodeposit HgTe-DNA nanowires (NWs). As evidenced from transmission electron microscopy, Fourier-transform infrared and optical absorption studies, the growth of HgTe NWs is ascribed to the electroactive aggregation of respective cations with DN…
The dynamics of the domain structure observed in ferroelectrics with two dipoles per ferroelectric cell—analogues of the Seignette salt crystal—is studied. Kinetic equations for the mean values of pseudospin operators are derived based on the Hamiltonian of the problem. These equations are used to numerically study th…
SrTiO3 submicro-wires were prepared by the reaction of layered titanate nanowires with Sr (OH)2 powder in an autoclave. The wires were investigated using X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), Ultra-violet visible (UV-vis), photoluminescence (PL) and Raman…
The effect of a dc electric field on the nucleation and evolution of the phase with long-range order in a cubic nonpolar matrix in 〈001〉-oriented (100 − x )PbMg 1/3 Nb 2/3 O 3 - x PbTiO 3 single-crystal relaxors as the content of PbTiO 3 is gradually increased (6 ≤ x ≤ 20, where x is the PbTiO 3 content given in molec…
The cation-induced aggregation of sandwich crown-substituted complexes [Ln(R 4 Pc) 2 ] (Ln = Lu ( I ) and Yb ( II ), R 4 Pc 2− is the 4,5,4′,5′,4″,5″,4‴,5‴-tetrakis(1,4,7,10,13-pentaoxatridecamethylene)phthalocyaninate ion) and Ln 2 (R 4 Pc) 3 (Ln = Lu ( III ) and Yb ( IV ) in a CDCl 3 -DMSO- d 6 solution has been stu…
This article describes the synthesis of some selected tetra‐thiophenyl‐substituted ethenes by McMurry coupling of some selected thienyl ketones, including a surprising coupling product. The products were analyzed by MS, NMR, UV, and x‐ray crystallography. Their cyclic voltagrams were recorded.
Article The Influence of Hybrid Coatings on Scaling-Resistant Properties of X33CrNiMn23-8 Steel was published on April 1, 2007 in the journal High Temperature Materials and Processes (volume 26, issue 2).
A mathematical model was developed for describing the changes in the state of the reservoir bed for dee-well injection disposal of acid liquid radioactive waste. The model considers the multicomponent filtration of the solution in the heterogeneous bed, sorption-desorption of radionuclides, taking into account the dep…
The composition, density, and seasonal variations of the planktonic diatoms of Lake Kaz were studied using samples taken from the surface and 1.0 m depths between May 2005 and April 2006. Some physical and chemical properties of the lake water were also determined. Planktonic algae communities were identified, with 14…
The thermal expansion and electrical conductivity of La0.7Sr0.3Mn1 − y CryO3 (y = 0, 0.1, 0.3, 0.4) solid solutions have been studied at temperatures from 300 to 1270 K and oxygen partial pressures from 10−9 to 2.1 × 104 Pa. The solid solutions crystallize in rhombohedral symmetry (sp. gr. R3c). The lattice parameters…
The tribological behavior of a new cermet Ti3AlC2/Cu was experimentally investigated. The results showed that the Ti3AlC2/Cu was a good tribological material sliding against the low carbon steel, especially for a high sliding speed. The friction coefficient was as low as 0.13 ~ 0.15, and the Ti3AlC2/Cu wear rate was o…
The work focuses on the influence of ion bombardment on the microstructure of gas flow sputtered lead zirconate titanate (PZT) films. PZT is a well-known piezoelectric material used in many piezoelectric sensor and actuator applications. However, films in the 10 µm thickness region are still in demand for fast and pow…
One of the most important factors in an artificial pollution test of transmission and distribution insulators of power systems is the short-circuit current of the source. Most laboratories do not have strong source and test transformers. In this paper a test setup has been introduced to improve the performance of high…
The oxidation of carbon monoxide on xMgO · yFe2O3 catalysts was studied over the temperature range 440–660 K. The catalysts contained 5, 40, and 75 at % Fe and the spinel MgFe2O4 and MgO phases. Complete CO conversion on compact and deposited (on γ-Al2O3) catalysts containing 75 at. % Fe occurred at 650–660 K. The kin…
To investigate the electrical conduction properties in polyimide affected by moisture absorption, charge mobility was measured by "charge chromatography". A time-dependent charge distribution was monitored by an electroacoustc method when a pulse voltage was superposed on a dc bias voltage. In this newly proposed tech…
Abstract Recent studies have revealed that bulk nanostructured metals and alloys produced by severe plastic deformation can demonstrate extraordinary superplasticity at low temperatures and/or high strain rates. This work presents new results on superplasticity in several nanostructured Al and Ti alloys focusing on mi…
This article discusses the dielectric breakdown characteristics of an insulator with a sharp edge that forms inhomogeneous gaps in SF6under a lightning impulse voltage. The high voltage electrode is a plane electrode, and the grounded electrode is a plane electrode with a column insulator, which has an inside electrod…