Materials Literature
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Article Handbook of Microscopy, Applications in Materials Science, Solid-State Physics and Chemistry was published on January 1, 1998 in the journal Zeitschrift für Physikalische Chemie (volume 204, issue 1-2).
The absorption and circular dichroism spectra of PCP (peridinin–chlorophyll a protein) light-harvesting complexes from Glenodiniumsp. and Gonyaulaxpolyedra are studied in terms of vibronic coupling theory. Analysis based on a tetramer model allows the determination of the relative positions of peridinin molecules in t…
Porphyrin-α-diones have been used for the preparation of extended rigidly oriented porphyrin systems. Copper 2, free-base 3, and zinc 4 2-hydroxyporphyrins have been prepared by an improved method and treated with a range of oxidants to form the corresponding porphyrin-α-diones, 5, 6, and 7 in yields of up to 94%. We…
The object of this study is hypereutectic and hyperperitectic Al alloys with refractory additions (Fe, Sc, Mn, Ti, Zr), obtained by heat time treatment of melt and rapid crystallization. The main structural components of these alloys are primary crystals of transition metals aluminides. The morphology and the size of…
A complete series of well-crystallized solid-solution oxide films, Sr1−XCaXWO4 (0⩽X⩽1), has been prepared on a tungsten substrate in an electrolytic solution containing Sr2+ and Ca2+ ions by electrochemical anodization of tungsten substrates at room temperature (25 °C). The composition of the solid-solution oxide film…
In order to have a better knowledge of the mechanical behaviour of the oxide layers growing on zirconium alloys in pressurized water reactors, the textures of different zirconium alloys and their oxide layers are studied. The results show that the texture of the oxide layers present a feature common to all the layers:…
Amorphous fibres of boehmite OH—Al=O are synthesised using an electrochemical surface oxidation reaction of an amorphous Al plate in open air at room temperature. The microstructures of the samples, measured at selected periods of time of reaction, demonstrate a very rapid growth in the separated fibres with a highly…
Ni(II) complexes of hydrazonic ligands derived from 2, 6-disubstituted pyridines and alkyl or aryl hydrazides are synthesized and characterized. The coordination geometry depends on the type of R' substitutents of the ligand. When R' is alkyl, stable complexes with square planar geometry are obtained with an E,Z induc…
The bridging behavior and redox mechanisms of liquid crystalline octahedral iron(III) complexes (such as the anhydrous complex below) were studied in detail by polarization microscopy, DSC, and Mössbauer spectroscopy. We gained great insight into the changes in molecular structure, and describe here a new type of magn…
The historical evolution and the future aspects of high resolution electron microscopy are covered briefly. As for the applications for materials science and inorganic chemistry, we are positive about the future of electron microscopy, particularly when combined with other techniques. The strong interaction between sa…
The cohesive properties and chemical stability of diborides MB2 have been analysed using the results of full-potential LMTO calculations. A comparison of interatomic M–M, M–B and B–B interactions in MB2 phases (M = Ti, V, Zr, Nb) shows that the changes in the cohesive properties are mainly controlled by the strength o…
The dynamical behaviour of an isolated combustible gas bubble surrounded by unlimited inviscid liquid is analysed in the case of large activation energy and using spatially uniform assumptions. The pressure effect is crucial in this problem because of the limited gas volume. The mathematical model used is a system of…
Exceedingly high strength hasbeen anticipated for carbon nanotubes since their discovery, promising novel material applications. The strength of carbon bonds and their perfect arrangement within the walls suggests indeed an extreme stiffness along the axis, combined with resilience in other directions. Both experiment…
Al2O3/aluminate composites were fabricated by a solid reaction in the La2O3-Al2O3 system. The formed phase showed elongated morphology that could be controlled by varying the hot-pressing temperature and time. Dense Al2O3/LaAl11O18 composites were fabricated by hot-pressing above 1500°C. When the hot-pressing temperat…
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The novel complexes [1,9-bis(2-pyridyl)-2,5,8-triazanonane]-(protoporphyrinato)iron(III) 4, -(mesoporphyrinato)iron(III) 5 and -(deuteroporphyrinato)iron(III) 6 were synthesized from the parent compounds chloro-(porphyrinato)iron(III) 1, -(mesoporphyrinato)iron(III) 2 and -(deuteroporphyrinato)iron(III) 3 and 1,9-bis(…
In this paper the application of neural network (NN) to the probabilistic inference of partial discharge (PD) phenomena generated from electrical tree growth is presented. On the basis of experimental results of measurements of trees occurring in a needle-plane arrangement, stochastic quantities are derived, which are…
In this paper, we present a method to avoid hysteresis in magnetostrictive-piezoelectric sensors. It is based on the application of an alternating magnetic field of a frequency different than the piezoelectric exciting frequency that supplies enough energy to overcome any domain wall pinning. The signal is filtered wi…
(CH3)2NC6H4NC6H4O is a merocyanine dye that exists in resonance between the two extreme conformations of a keto and an eno form. The keto form is more stable in the gas phase and the eno form is believed to be more stable in solution. We show that the keto form can prevail in nonpolar solvents, but in polar solvents l…
This paper aims to determine the electromagnetic forces acting in a power transformer, when a current corresponding to the first peak of a three‐phase circuit flows in the windings. The finite element method for the evaluation of the field’s values is applied, and the electromagnetic forces acting in a power transform…