Materials Literature
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The appearance of self-organized structures on elastomer surfaces owing to the combined treatment of ionizing radiation and mechanical strain is described. For example, ion bombardment of stretched elastomer surfaces after subsequent relaxation of the polymer results in a self-organized, undulating surface topology, w…
A cerium dioxide (CeO2) film with characteristic cubic lattice and optical band gap energy has been deposited chemically onto a non-conductive glass substrate at 333 K by simple immersion into an aqueous solution containing hydrous cerium(III) nitrate and dimethylamineborane (DMAB).
A new series of sodium/potassium salts of sandwich-type [Mn+3(H2O)x(BiW9O33)2](18 − 3n)− heteropolyanions (Mn+ = (VO)II, x = 0 (1) and Mn+ = CrIII (2), MnII (3), FeIII (4), CoII (5), NiII (6), CuII (7), x = 3) were synthesized and characterized by means of elemental analyses, thermogravimetry, FT-IR, UV-VIS, EPR and H…
This volume reviews the metal and ammonium formate solubility data published up to 1995. So far as the editors are aware, all the solubility data published during this period have been reviewed. Preference has been given to data published in numerical form. Data that appeared only in graphical form may not appear in t…
The influence of different hosts, processing conditions and conducting fillers on the percolation threshold (Φc) of the resulting conducting blends was investigated. Results indicate that microscopic properties, such as the dipole moments of the side-groups, and distribution of these groups on the host polymer backbon…
Ligand exchange reactions of chloride ligands on a trinuclear palladium acetylide core with platinum acetylide dendrons having a 4-pyridyl group at a focal point result in the quantitative formation of novel organometallic dendrimers, which easily revert to the core and the dendrons by treatment with Bu4NCl.
The incorporation of up to 40 % lead excess into the perovskite lattice of Pb(Zr,Ti)O3 (PZT) has been investigated. Three independent chemical composition analysis methods confirmed the correct determination of the lead excess, present as Pb2O3. High resolution TEM excludes any second phases and restricts the occurren…
All articles of this category 2,3-Dibromobenzofuran ( 1 ) and 2,3,5-tribromobenzofuran ( 2 ) undergo regioselective Sonogashira- and Negishi-type cross-coupling reactions at the 2-position. Subsequent substitution reactions at C-3 are possible for the cross-coupling products obtained from compound 1 . A regioselective…
Conventional loading of induction motors is an extremely difficult and expensive process for large machines. In those cases, full load losses and temperature rise can be estimated by means of equivalent loading methods, which provide an accurate alternative, without the need of a mechanical load applied to the shaft.…
Mesoporous aluminosilica molecular sieves AlMCM-41 are loaded with different amounts of Ag+, Pd2+ and Pt2+ ions by varying the Si/Al ratio, which changes the ion exchange capacity. These metal ions are reduced to metal particles by hydrogen and characterized by conduction electron paramagnetic resonance (CEPR). Metal…
The present paper first shows that the scalar stop hysteron model has the property of equal vertical chords for back-and-forth input variations of the same amplitude. This property leads to an identification method of the scalar model. Secondly, identification methods are developed for the 3-D and 2-D isotropic vector…
Highly dispersed was prepared by freeze-drying followed by hydrogen reduction. The catalyst particle size was examined by transmission electron microscopy and X-ray diffraction line broadening technique as well as electrochemical Pt surface area measurement by and CO stripping. Oxygen reduction on Teflon bonded electr…
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…