Materials Literature
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Alkaline earth doped lanthanum manganites (La 1-x M x MnO 3+δ , with M=Ca, Sr, Ba...) are attracting materials because of their peculiar properties displayed in giant magnetoresistance and electrocatalytic activity Classical synthesis routes of the material make use of solid state reaction, among suitable precursors,…
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Disk-shaped functionally graded materials of copper/alumina system have been fabricated by spark plasma sintering(SPS process. The graded layer consists of symmetrical compositional transition of Cu/Al2O3/Cu, which allows to achieve high heat conduction, electrical insulation and excellent in-plane electrical conducti…
Description Features the most current information on experimental and analytical research in key areas of composite technology. Leading experts in the field have presented 18 comprehensive, peer-reviewed papers covering the following major categories: Fatigue and Fracture-- 8 papers focus on microstructural effects, d…
The temperature dependent changes of logarithmic decrement δ and Young’s modulus E were measured for continuously cooled Mn74.8Cu19.2Ni4.0Fe2.0 and Mn72.4Cu20.0Ni5.6Fe2.0 (at%) alloys, after solid solution holding at 1173 K. Microstructure of those alloys, cooled to room temperature in different rates, was characteriz…
The process of conversion of hydrated basic dicarboxylate aluminium(III) complexes Al(OH)(succinate)xH2O and Al(OH)(adipate)xH2O to alumina and aluminium nitride (AlN) has been investigated by 27Al magic angle spinning nuclear magnetic resonance (MAS NMR) spectroscopy. The powdered succinate complex was calcined under…
An extensive experimental study has been carried out to better understand the high temperature properties and behaviours, such as oxidation, alkali-erosion and thermal shock resistance of the Si3N4-bonded SiC refractory. The mechanism of erosion damage of the Si3N4-bonded SiC brick lining in the blast furnace environm…
The effect of an ultrasonic field on the precipitation process of barium sulphate has been investigated. Experiments in a semi-batch precipitator showed that small crystal sizes with narrow distribution are obtained with ultrasound in a very reproducible way; however, this effect could not be assigned to an improvemen…
Macrocyclic [4 n + 2]‐ Hückel Aromatic Systems up to n = 9 and [4 n ] Antiaromatic Systems up to n = 10: Homologous Sequences from Tetraepoxy[24]annulene(2.0.2.0) to Tetraepoxy[40]annulene(12.0.12.0) and from the ‘Tetraoxa[22]porphyrin(2.0.2.0)‐’ to the ‘Tetraoxa[38]porphyrin(12.0.12.0’‐Dication 1 ) 2 ) Tetraepoxy[32]…
Screening of surfactants was carried out to develop an oil in water (o/w) emulsion type new vehicle for a soft gelatin capsule (SGC), using polyethyleneglycol 400 (PEG 400) as hydrophilic phase and medium chain triglyceride (Miglyol 810), propyleneglycol dicaprylate (Sefsol 228) or soybean oil as hydrophobic phase (PE…
In this paper, the authors examine the relationship between the sewability and the structural, physical, and FAST characteristics of wool and wool-blend woven fabrics. Forty wool and wool-blend woven fabrics were studied, and, in particular, the influence of the sewing-needle type and diameter was examined. Multiple-r…
Two types of formaldehyde-treated soy protein isolate (SPI) films, formaldehyde-incorporated and formaldehyde-adsorbed films, and control SPI films were prepared. Cross-linking effect of formaldehyde on selected film properties such as color, tensile strength (TS), elongation at break (E), water vapor permeability (WV…
A novel rapidprototyping (RP) technology incorporating a curved layer building style has been developed. The new process,based on Laminated Object Manufacturing (LOM), is suited for efficient fabrication of curved layer structures made from ceramics and fibrous composites. Anew LOM machine was developedithatuses ceram…
The magnetic properties of ultrafine copper ferrite particles have been investigated, and to examine the possibility of enhanced coercive force in ultrafine particles by Jahn-Teller effect. Ultrafine copper ferrite particles prepared by coprecipitation have been heated at various temperatures. X-ray diffraction patter…
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:…