Materials Literature
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Abstract Polypropylene reinforced with glass fiber (28 percent by weight) was injection molded under different processing conditions. The influence of injection‐molding parameters such as pressure, injection speed, and injection temperature on the morphology and mechanical properties was studied using standard techniq…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics of coal gasificationMartin Schmal, Jose Luiz Fontes Monteiro, and Jorge Luiz CastellanCite this: Ind. Eng. Chem. Process Des. Dev. 1982, 21, 2, 256–266Publication Date (Print):April 1, 1982Publication History Published online1 May 2002Published inissue 1 April 1982h…
Abstract Die Arbeit gibt einen Überblick über Forschungsergebnisse des Max‐Planck‐Instituts für Metallforschung auf dem Gebiet der Umwandlungsverstärkung keramischer Werkstoffe. Die kontrollierte Ausnutzung der tetragonal → monoklinen Phasenumwandlung dispergierter ZrO 2 ‐Teilchen ermöglicht eine Reihe unterschiedlich…
Abstract An expression for the impluse due to a vapour (cavitation) bubble is obtained in terms of an integral over a nearby boundary. Examples for a point source near a free surface, rigid boundary, inertial boundary and a fluid of different density are considered. It appears that the sign of the impluse determines t…
Measurements of the sound velocity c in water, heavy water, and water–ethanol mixtures have been carried out in a temperature range extending from room temperature to the supercooled region above -20 °C, by Brillouin light scattering technique. Pure H2O and D2O show a strong anomalous behavior which can be described b…
Disodium cromoglycate in water (~10-15% by weight) forms a nematic liquid crystalline phase of negative diamagnetic anisotropy which readily orients in a magnetic field. The phase transition temperatures are very sensitive to the nature and concentration of the cationic species. Addition of chiral guest molecules, and…
A survey of the spectral, electrochemical, and chemical properties of organic and inorganic 2,2′-bipyridine (bpy) radical derivatives leads to the conclusion that these species form a common family whose properties are largely determined by those of bpy, the one-electron reduction product of bpy.
The low-temperature heat capacity of the superconducting ${\mathrm{LaS}}_{x}$ ($1.333<~x<~1.500$) compounds with the ${\mathrm{Th}}_{3}$${\mathrm{P}}_{4}$-type structure were measured from 1.3 to 20.0 K in magnetic fields of 0, 2.50, 5.39, 7.62, and 9.98 T. The compositional variation of the electronic specific-…
The aim of this paper is to review our present knowledge of the physics of electrical coronas and their interaction with surfaces, with some emphasis on phenomena which seem of importance for high voltage insulation. We will concentrate on fundamental and general subjects, in order to limit the scope of the paper and…
Abstract Imogolites in which a part or all of Si was substituted with Ge were synthesized from solutions containing aluminum ion and silicic and/or germanic acid. The products were similar to natural imogolite in their tubular morphology, electron diffraction patterns, and differential thermal analysis curves. However…
The magneto-volume effect of the weak itinerant ferromagnet MnSi has been studied by measuring both the thermal expansion over a wide range of temperature and the forced volume megnetostriction at different temperatures. The forced magnetostriction at 4.2 K as well as the magnetic thermal expansion at 10 kOe, Δω m ( H…
Insulator surfaces in gases collect charge when the rate of charge arrival exceeds the rate of conduction by the insulator from the surface region. The source of the collected charge may be in close proximity to, and hence greatly influenced by, the surface. Alternately, the source may be remote so that it releases ch…
Abstract The mechanism of low‐temperature relaxations in bisphenol‐A‐type epoxide resins cured with aliphatic diamines, with aliphatic diamines in the presence of salicylic acid as an accelerator, and with tertiary amines was investigated to compare the dynamic mechanical properties and the chemical structure of these…
Both the spectral dependence and the magnitude of the excitation spectra of surface-enhanced Raman scattering are found to be quantitatively related to the absorption spectra for silver-island films. This relationship is maintained even when the local electromagnetic enhancement at the islands is varied by coating the…
There are four distinct types of fracture in superplastic materials: failure by quasistable plastic flow, failure by necking, cavitation failure, and quasibrittle failure. The characteristics of these four types are described with reference to experimental examples. Maximum elongation occurs in a superplastic material…
The heat capacity of polystyrene from 0 K to 600 K is reviewed on the basis of measurements on 29 samples reported in the literature. A set of recommended data for amorphous polystyrene is derived. The effect of tacticity on the heat capacity is also evaluated. Entropy and enthalpy functions are calculated. This paper…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReversible titanium(3+) formation by hydrogen adsorption on M/anatase (TiO2) catalystsJ. C. Conesa and J. SoriaCite this: J. Phys. Chem. 1982, 86, 8, 1392–1395Publication Date (Print):April 1, 1982Publication History Published online1 May 2002Published inissue 1 April 1982ht…
Results of a molecular-dynamics computer simulation of the solid-fluid transition in two dimensions for a system of 780 particles interacting with a purely repulsive ${r}^{\ensuremath{-}12}$ pair potential are presented. The pressure as a function of density along the $T=1$ isotherm has a narrow nonmonotonic region wi…
The factors contributing to the large overpotential with respect to flatband potential required for hydrogen evolution and certain redox reactions at illuminated p‐type electrodes of various III–V compounds have been investigated. Results of photoelectrochemical studies, involving minority carrier transfer to redox sy…
The Cambridge Crystallography Subroutine Library (CCSL) is a versatile set of subroutines which will have many different applications for non-standard crystallography. At present it is used extensively at the Institut Laue–Langevin for interpreting all polarized neutron measurements, proceeding from the raw flipping-r…