Materials Literature
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Nucleation and growth mechanism of electropolymerization of aniline on highly oriented pyrolytic graphite (HOPG) are investigated by a potentiostatic current–time transient technique (i–t) and atomic force microscopic measurements (AFM). The electrochemical data fitted with a theoretical model suggest that there are t…
Raman and optical absorption studies of the antiferromagnetic insulator MnO were performed at several temperatures under high pressure. In Raman scattering at 2 K, it was observed that the two-magnon peak shifts to higher energy with increasing pressure and then disappears at around 20 GPa. This suggests that a change…
Thin films of films have been deposited by radio frequency magnetron sputtering in order to study the effects of annealing temperatures less than 1000°C on the thin-film electroluminescent properties. Energy-dispersive X-ray compositional analysis showed a loss of zinc during sputtering, with the film composition bein…
An electrical pulse current of 3 - 5 kA during 3 - 5 μs was used to heat zirconium tapes of foils. The tapes (width 1-2 mm and length 30 mm) were placed in a chamber under 1 bar ambient air atmosphere. Specific enthalpy, resistivity, temperature, and specific heat capacity in solid and liquid states (up to 2350 K) wer…
This paper describes a technique for the simulation of complex magnetic systems intimately connected to any necessary drive electronics. The system is split into two Kirchhoffian domains, one magnetic and one electric. Two-way interaction between the domains is supported by a virtual device called a magnetoelectric di…
Two experiments were conducted comparing pelleted recycled newspaper (PN) to wheat straw (S) and kiln-dried pine wood shavings (WS) as an animal bedding material. Adult horses housed 20 to 21 h/d in boxstalls served as the animal model for comparisons. In Exp. 1 eight boxstalls, each housing one horse, were each bedde…
A series of Al2O3–TiO2 mixed oxides with different TiO2 concentrations (6%, 14% and 44% by weight) and the single oxides were prepared by the sol–gel method. The hydroxide precursors were transformed into their respective oxides and calcined at 500 °C, 700 °C and 900 °C. The evolution of the morphology, microstructure…
Presents a novel technique for the identification of the parameters of the probability function used in the Preisach-based modeling. This technique seems to pass over the problems linked with the use of a product of two single-valued functions as a probability function that in the case of soft magnetic materials may c…
The voltammetric response of silver was used to detect hydrosulfides produced from MnS inclusions in stainless steel (SS) 304 at different dissolution paths. Cyclic voltammetry was performed in aqueous solutions containing various sulfur species, such as sulfate, sulfite, thiosulfate, and hydrosulfide. Ag showed redox…
Abstract The synthesis and photophysical and photochemical characterization of four novel bacterio-chlorin-fullerene dyads with fullerene C60 coupled at various positions and by various bridges to the chlorin ring are described. All dyads undergo rapid charge separation in the sub-picosecond to picosecond time range a…
We report on the rheology and deuteron nuclear magnetic resonance (NMR) measurements performed on the nematic lyotropic system sodium dodecyl sulfate, decanol, and water. For total surfactant and cosurfactant concentrations of about 30% by weight, we prepared nematic calamitic NC and nematic discotic ND solutions. We…
In fragile glass-forming ionic melts, spectra of the ionic conductivity have been taken in wide ranges of frequency and temperature. In our experiments, we have studied and over more than ten decades on the frequency scale, including the far infrared. The results exhibit characteristic traits, and a clear-cut picture…
The synthesis and characterisation of the first banana-shaped mesogens which exhibit a direct transition from the antiferroelectric B2 phase to the nematic phase are reported.
The depth profiles of D atoms and D 2 molecules in W single crystals and hot-rolled W implanted with 6 keV D ions at 300 and 650 K were determined by means of secondary ion mass spectrometry (SIMS) and residual gas analysis (RGA) measurements in the course of surface sputtering. Retention of deuterium and lattice dama…
To clarify the deformation mechanisms and to improve the mechanical properties of dynamic vulcanizates, we studied their deformation behavior by Fourier-transform infrared (FTIR) spectroscopy. It was found that the orientation in the dispersed phase (EPDM phase) is higher than in the matrix (PP phase) upon loading. Th…
The crystal structures of two kinds of nitronyl nitroxide biradical with a phenolic substituent, 2,4-bis(1-oxyl-3-oxido-4,4,5,5-tetramethyl-2-imidazolin-2-yl)phenol (1a) and 4-methyl-2,6-bis(1-oxyl-3-oxido-4,4,5,5-tetramethyl-2-imidazolin-2-yl)phenol (2a) have been solved. The biradical 1a belongs to the monoclinic sy…
The detailed structure analysis for a series of the Al–Mn–Fe–Si Mackay-type 1/1-cubic approximants has been performed by applying the Rietveld method to the x-ray powder diffraction spectra taken with a synchrotron radiation x-ray source. We found that identical Mackay clusters occupy both the body-center and vertex p…
Many modern induction motor applications involve nonsinusoidal voltage supply. Under such operating conditions, the motor performance can be seriously affected while the standard equivalent circuit is no more adequate for the motor analysis. In this paper, a modified equivalent circuit topology is introduced, in order…
The formation of film coatings from aqueous polymer dispersions is a complex process, highly dependent on additives and process parameters. Release instability of modified release coatings from aqueous polymer dispersions is a frequently described problem that hinders the general application of such dispersions. Howev…
Anisotropic thermoelectric properties of crystal-axis oriented polycrystals of layer-structured oxide in the Ca-Co-O system was discussed. Plate-like particles of (Ca2.7Bi0.3) (Co3.7Cu0.3)O9+δ were synthesized. To improve the thermoelectric properties, a c-axis oriented polycrystal of (Ca2.7Bi0.3) (Co3.7Cu0.3) O9+δ wa…