Materials Literature
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Methyl fluorochlorobromoacetate was reduced either with lithium aluminium hydride or, better, with diisobutyl aluminium hydride. Work-up in the presence of water gave a mixture of the hydrate and methyl hemiacetal of fluorochlorobromoacetaldehyde. The mixture was dehydrated with phosphorus pentoxide/sulphuric acid to…
Resin concrete has been widely used in machine tool structures in order to improve the dynamic properties, to reduce the lead time of production and to reduce thermal deformation. It has been pointed out, however, that Yung's modulus of the concrete is about one-seventh that of cast iron and is inferior to conventiona…
In direct contact melting, one of the factors that affect the heat transfer is the size of the heat transfer surface. This means that the shorter the path through which the melted liquid between the heat transfer surface and the solid of PCM (Phase Change Material) is rejected outside, the thinner the melted film, whi…
Some of the important static and dynamic properties of elastomers will be examined and some examples will be given to show how they were prioritized in the development of specific applications
A model based on single-ion theory has been presented and is shown to be applicable for quasiternary compounds. The model allows one to obtain from the experimental data information about the contributions to the magnetic properties originating from rare-earth ions at different crystallographic sites as well as on the…
Abstract The light beating technique (intensity correlation algorithm) was employed to analyze the Rayleigh scattering from the roughened Ag electrode in very dilute (10 −4 M) pyrazine, pyridine and piperidine aqueous solutions containing KC1 (0.1 M). The relaxation time is longer when the applied voltages are between…
According to Waser and Pauling the Badger rule on the relation between force constant and interatomic distance in diatomic molecules holds in solids, too. On this basis the stretching mode and the bending mode of the central atom in the unit cells were calculated for boron carbide with good and for β‐rhombohedral boro…
Thermal Physics is written for students studing the core Thermal Physics/Thermodynamics modules(s) at 2nd/3rd year UK undergraduate level. Thermal Physics deals with the transfer of energy to, from an
Abstract Die neuen Supraleiter‐Materialien mit Sprungtemperaturen oberhalb der Siedetemperatur des flüssigen Stickstoffs werden bereits im vierten Jahr nach ihrer Entdeckung im Bereich der Hochfrequenztechnik eingesetzt. Im Hinblick auf Anwendungen in der Magnet‐ und Energietechnik ist jedoch noch einiges an Entwicklu…
Two types of homologous series of superstructures have been found for La 2 NiO 4+ delta containing excess oxygen, i.e. delta >O. They are 2a*ka*1c (k, 1=n or 2n depending upon n) and square root 2a*p square root 2a*qc (most frequently p=2 and q=1), where a*a*c stands for the K 2 NiF 4 -type cell. The origin of these s…
The aim of the present work is to study the densification behaviour and microstructural evolution in zirconia alloyed with 3.4 wt % MgO. A comparison is made of products obtained by conventional mechanical mixing and the wet-chemical method of coprecipitating the constituents as crystallized materials obtained under h…
This paper reviews our research on diamond synthesis by etc plasma jet CVD. The unique feature of this method is supplying high radical density plasma to a substrate by quenching a thermal plasma. The maximum growth rate is 200 μm/h. The crystallinity measures well in terms of x-ray diffraction and Raman spectroscopy.…
Graphite finds applications in both fission and fusion reactors. Fission reactors harness the energy liberated when heavy elements, such as uranium or plutonium, fragment or fission''. Reactors of this type have existed for nearly 50 years. The first nuclear fission reactor, Chicago Pile No. 1, was constructed of grap…
This paper describes a novel route for the production of low-oxygen-containing fluorozirconate glasses. The process involves the use of a hitherto unknown solid-state chemical reaction between ammonium bifluoride and specific anhydrous and hydrated metal fluoride salts. The products are defined as ammonium fluoride–me…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTImprovements in the structure and adhesion of electrodeposited thin film cadmium selenideHenry Wynands and Michael CociveraCite this: Chem. Mater. 1991, 3, 1, 143–149Publication Date (Print):January 1, 1991Publication History Published online1 May 2002Published inissue 1 Jan…
A new approach is presented to the micromechanics or fiber assemblies, extending the current idea of the local fiber orientation distribution. The theory can predict all the differential elastic moduli of a mass in terms of its structural parameters, the density of fiber length, orientation density, fiber crimp parame…
Abstract The growing characteristics of splicing misoriented KDP seeds of both bulk and thin pieces were investigated. The chemical etching method was used to determine the prismatic and Z‐plate surfaces of the crystals grown by splicing bulk KDP seeds. The X‐ray Lang topography method was employed to measure original…
Al–Cu and Al–Si alloy round rods were experimentally produced by using a moldless upward continuous casting apparatus. Al–Cu and Al–Si alloys were selected because they have a wide solidification range and solidify in a mushy type or in a eutectic manner. Effects of the the alloying element, the superheat of molten me…
Polystyrene particles (size range 300nm-3μm diameter) were radioiodinated and their capture by rat peritoneal macrophages measured in vitro. For unmodified particles, most efficient accumulation was observed using a diameter of 600nm (Endocytic Index (E.I.) = 16.4 ± 2.9μl/106cells/h). Particles (3μm diameter) which ha…
Metabolism of the Flame Retardant Plasticizer Tris(2-chloroethyl)phosphate by Human and Rat Liver Preparations. CHAPMAN, D. E., MICHENER, S. R., AND POWIS, G. (1991) Fundam. Appl Toxrcol. 17, 2 15–224. Previous studies indicate that tris(2-chloroethyl)phosphate (TCP) preferentially produces hippocampal brain lesions i…