Materials Literature
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The various schemes for calculating inner shells X-ray absorption spectra are reviewed and shown to be mutually equivalent. The unifying framework is provided by the multiple scattering (MS) theory. In particular the formulation based on the Green's function approach allows one under certain conditions to write the ab…
Partial discharge (PD) pulses are considered to be generated after application of overvoltage across a cavity. Their magnitude is proportional to the n-th power of overvoltage. It decreases with an increase in cavity space and moisture content. Very long time lags for PD inception, such as even a day, was confirmed. T…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMulticomponent polyanions. 39. Speciation in the aqueous hydrogen ion-molybdate(MoO42-)-hydrogenphosphate(HPO42-) system as deduced from a combined Emf-phosphorus-31 NMR studyLage Pettersson, Ingegaerd Andersson, and Lars Olof OehmanCite this: Inorg. Chem. 1986, 25, 26, 4726…
Effective sintering aids for SiC ceramics are discussed on the basis of their reactivities with various sintering aids around sintering temperatures (2300 to 2400 K). The free energy consideration of the reactions suggests that metals and metal oxides which do not decompose SiC in the sintering process are effective a…
A series of synthetic fused silicas of diverse OH contents was subjected to 100-keV x irradiations at 77 K and investigated by electron-spin-resonance techniques at \ensuremath{\sim}110 K or higher temperatures. Spectra were recorded at X-band frequencies (\ensuremath{\sim}9.2--9.3 GHz) both as the first derivative of…
The early-to-late stage of the spinodal decomposition (SD) of the critical mixtures of polystyrene and poly(vinyl methyl ether) was investigated by the time-resolved light scattering technique. The early stage SD where the time evolution of the fluctuations can be described, at least with a good approximation, by the…
In previous works on galvanized reinforcements in contact with Ca- containing highly alkaline media, the authors have reported the existence of a threshold pH of 13,3 ± 0,1, below which the Zn in contact with such a medium is passivated by formation of a continuous layer of calcium hydroxyzincate, but at pH values abo…
The European Concrete Board (CEB) was founded in 1957 for the purpose of developing at an international level the study of any scientific and technical subject which might further building in concrete. Among its six founding members was the Spanish professor Eduardo Torroja. From then onwards, the CEB's prestige has c…
Five different compositions belonging to the equilibrium system CaO-Al2O3-Fe2O3 were dopep with a fixed quantity of MgO (6,5% wt). The compositions, which lie in different primary fields of crystallization and in different triangles of compatibility, were submitted to several thermal treatments. Each composition, whic…
This work, which is a follow-up of others, studies the development of the solid-stage quantity formed in ASTM D 1141-75 artificial seawater, in which the series of samples of mortar (1:3), made up of a portland cement (cement 3 < > P-450) and the mixtures cement 3/slag = 85/15 - 65/35 - 40/60 and 30/70, in weight, wer…
The purpose of this study is to give a scientific justification to some empirical results, in steel corrosion field, from concrete containing chlorides. First, it appears that corrosion products on the steels, have different structures and natures in function of the chloride content would be inferior or superior to a…
Abstract This paper presents the results of an experimental study of the miscibility gap between trioctahedral and dioctahedral micas in the system K 2 O Li 2 O-MgO-FeO-Al 2 O 3 -SiO 2 -H 2 O-HF at 600°C under 2 kbar P H2O . The existence of this miscibility gap is known from previous experimental studies. The gap is…
In this paper we wish to show that metal impregnated conducting polymers can be useful as the active material in microelectrochemical devices that respond to certain chemical changes in aqueous solution. We report here the impregnation of poly(3-methylthiophene) with metallic Pt in order to make the conducting polymer…
Freely suspended liquid-crystal films of the smectic-I phase of HOBACPC [R(-) hexyloxybenzylidene p'-amino-2-chloropropyl cinnamate] display distinctive stripe and droplet textures. We derive these patterns from a Landau expansion of the free energy using a vector order parameter. Strong pinning boundary conditions le…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProximity effect in molecular photophysics: dynamical consequences of pseudo-Jahn-Teller interactionEdward C. LimCite this: J. Phys. Chem. 1986, 90, 26, 6770–6777Publication Date (Print):December 1, 1986Publication History Published online1 May 2002Published inissue 1 Decemb…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhenyl-capped octaaniline (COA): an excellent model for polyanilineF. L. Lu, Fred. Wudl, M. Nowak, and A. J. HeegerCite this: J. Am. Chem. Soc. 1986, 108, 26, 8311–8313Publication Date (Print):December 1, 1986Publication History Published online1 May 2002Published inissue 1…
Abstract Differential scanning calorimetry (DSC) and the density gradient technique (DGT) were used to determine, both isothermally and dynamically, the crystallization kinetics of polyetheretherketone (PEEK). The data were analyzed by a model utilizing, for the first time, two crystal nucleation and growth processes…
The nature of passive films formed on 304 stainless steel at +0.25V ( vs. SCE) in deaerated solutions of and has been determined by RHEED and variable angle XPS. Evidence is given of and Cl − incorporation into the outer Fe‐rich regions of the passive film. In addition to Cr 3+ species which make up the inner layer of…