Materials Literature
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Abstract Reactive blending of poly(ethylene terephthalate)/poly(ethylene naphthalene 2,6dicarboxylate) with addition of 2,2'‐bis(1,3‐oxazoline) (BOZ) has been studied under various mixing conditions for the different compositions. The transesterification level, the sequence length of both PET and PEN short blocks, and…
Abstract X‐ray photoelectron spectra of free‐electron metals such as magnesium and aluminium contain pronounced electron energy‐loss peaks due to plasmon excitations. Part of the intensity contained in these plasmon peaks is of an intrinsic nature. In this work a procedure is presented that allows the determination of…
Universita¨t StuttgartInstitut fu¨r Technische OptikPfaffenwaldring 970569 Stuttgart, DeutschlandE-mail: tavrov@ito.uni-stuttgart.deAbstract. The signal-to-noise ratio required to obtain 10-nm accuracy inthe measurement of lateral position is studied with an interference mi-croscope. Evaluations are performed using th…
The spin-spin interaction of Dy3+ ions in a KY(WO4)2 single crystal is investigated by electron paramagnetic resonance (EPR) spectroscopy at a temperature of 4.2 K and a frequency of 9.2 GHz. The EPR spectra of ion pairs located in different coordination shells are analyzed. It is revealed that the considerable contri…
Abstract The complete nickel-indium system was thermodynamically assessed at a total pressure of 1 bar from room temperature up to liquidus temperatures. The Gibbs energies of five condensed soluti...
Two routes currently exist for the commercial production of primary magnesium: thermal and electrolytic. The electrolytic process accounts for 75% of the Western world's production capacity and this level is expected to increase if known magnesium projects materialize in the near future. Commercial applications of the…
Ten hausmannite crystals (from Ilfeld and Friedrichrode, Harz, Germany), belonging to the (Mn 1-x Zn x )Mn 2 O 4 (0 ≤ x ≤ 0.26) system (I4 1 /amd hausmannite structure type), were characterized by chemical (electron microprobe) and structural (single-crystal X-ray diffractometer) analysis. The prevailing trivalent cat…
In this work, alternative heterojunction devices to be used for gamma-radiation detection are presented. The high quality silicon/polyaniline heterostructures use polyaniline thin films as an active part of the device structure. Polyaniline thin films 40 nm thick were deposited onto silicon substrates (n-type, <100>,…
X-ray diffraction experiments are used to obtain short-range order information of gallium phosphate glasses of meta- and pyrophosphate compositions. Parameters of the first-neighbor peaks, such as coordination numbers and distances, are obtained. A strong decrease of the Ga-O coordination number from 6.0±0.2 to 4.6±0.…
The crystal structure of a lutetium silicon oxynitride (Lu 4 Si 2 O 7 N 2 ) was analyzed by the Rietveld method using time‐of‐flight (TOF) neutron powder diffraction data. The compound crystallizes in a monoclinic cell, space group P 2 1 / c (No. 14‐1) with a = 7.4243(1), b = 10.2728(1), c = 10.6628(1) Å, and β= 109.7…
Janis (Java-based nuclear information software) is a display program designed to facilitate the visualisation and manipulation of nuclear data. Its objective is to allow the user of nuclear data to access numerical and graphical representations without prior knowledge of the storage format. It offers maximum flexibili…
La burnsite, dont la formule ideale est KCdCu 7 O 2 (SeO 3 ) 2 Cl 9 , a ete decouverte dans une fumerolle dans la breche du Nord de la grande eruption fissurale du volcan Tolbachik (1975-1976), dans la peninsule de Kamchatka, en Russie. Elle se presente en grains rouge fonce, xenomorphes, equidimensionnels. Lui sont a…
Abstract Adsorption of phenols (phenol and 2-naphthol) onto the 1,1′-dimethyl-4,4′-bipyridinium (methylviologen:MV2+)-smectite intercalation compounds, which were synthesized by ion exchange reactions, led to the change in the color and the basal spacing. The color change was ascribed to the formation of charge-transf…
Abstract The adsorption of NO and its reaction with CO have been investigated on Pt/Al 2 O 3 and Rh/Al 2 O 3 by in situ infrared spectroscopy. Different spectroscopic features have been observed on Rh and Pt after NO exposure at various temperatures, mainly related to the build up of positively, neutral and negatively…
The quadratic nonlinear optical efficiency of the 2-amino-5-nitropyridinium dihydrogen chloride crystal is studied. The quadratic coefficients are determined by second-harmonic generation as d11=9 pm/V and d12=8 pm/V. The effective coefficients are obtained as deff=5.1 pm/V for type I and deff=9.7 pm/V for type II. Fo…
The optical spectra of dravite (tourmaline) with an unusually high ratio of Fe 3+ to Fe 2+ and a synthetic elbaite with high Fe 3+ content were studied at high temperature (297 to 600 K) and high pressure (to 10.51 GPa) conditions. Individual absorption bands derived from paired Fe atoms were identified in the spectra…
The thermal shock resistance of sintered Al 2 O 3 /1, 2.5, and 5 vol% SiC nanocomposites was studied using two indentation techniques. In the first technique, “indentation thermal shock” measurements were made of the extension of median/radial cracks around Vickers indentations after quenching from various temperature…
Abstract Hydrosilylation of fluorinated olefins with polyhydromethylsiloxane (PHMS) in the presence of a platinum catalyst was investigated to synthesize fluorosilicone having highly fluorinated alkyl side chains (R f ; C n F 2 n +1 ). The hydrosilylation of 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10‐heptadecafluoro‐1‐dece…
Abstract Melamine fibre is a new category of advanced synthetic fiber having superior heat and flame resistance with decomposition temperature above 350°C. It suitability as a reinforcing fiber for ethylene propylene diene terpolymer, abbreviated as EPDM rubber, where ‘M’ stands for polymethylene chain, was investigat…
Using the vanishing of the typical polaron tunneling rate as an indicator of the breakdown of itinerancy, we study the localization of polaron states in a generic model for a disordered polaronic material. We find that extremely small disorder causes an Anderson localization of small polaron states. However, the ratio…