Materials Literature
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Linear sweep voltammetry, photocurrent spectroscopy, impedance and reflectance measurements have been used to study the growth and stability of anodic oxide films on titanium in and . Films were grown typically to a formation voltage of 40V (∼100 nm) and had a density close to that of anatase, 3.9 g cm −3 . Two regime…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and characterization of some hydroxy complexes of iron(III) porphyrinsRu Jen Cheng, Lechoslaw Latos-Grazynski, and Alan L. BalchCite this: Inorg. Chem. 1982, 21, 6, 2412–2418Publication Date (Print):June 1, 1982Publication History Published online1 May 2002Publis…
A statistical-mechanical model for reversible gelation is developed. This model takes into account solvent effects, which usually are neglected in the classical theory of gelation. The exact solution of this model is given for the limiting case in which "loops" or intermolecular interactions may be neglected (Cayley t…
A method of measuring the inductance of ferrite core coils which requires no resonant capacitance, thereby eliminating need for circuit tuning to permit quick measurement, is described. The experimental instrument could measure the inductance from 250 to 350 μH at 796 kHz. The values of inductance measured with this i…
Abstract The thermodynamics of two types of isostructural phase transitions (IPT) is investigated in the framework of the Mitsui model using the molecular field approximation. The first type of IPT is obtained including four‐particle interaction members into the Hamiltonian. The consideration dealing with the temperat…
The alternatives to the oil based fuels for transportation are considered and analysed. These are the synthetic fuels, made from coal, the liquid petroleum gases of propane and butane, compressed natural gas and methanol. The problems associated with the use of electric vehicles are discussed; the main problem being t…
Abstract Ag 3 BO 3 ‐II, eine Stapelvariante von Ag 3 BO 3 ‐I, kristallisiert mit a = 987,8(3); c = 1351,2(6) pm in R 3 c. Strukturbestimmung und Parameterverfeinerung auf der Basis von 376 Reflexen (Diffraktometerdaten) führten zu einem konventionellen R‐Wert von 0,035. Die Silberteilstrukturen und die Positionen der…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGallium and indium imaging agents. 2. Complexes of sulfonated catechoylamide sequestering agentsVincent L. Pecoraro, Geoffrey B. Wong, and Kenneth N. RaymondCite this: Inorg. Chem. 1982, 21, 6, 2209–2215Publication Date (Print):June 1, 1982Publication History Published onlin…
A simple and rapid technique to measure the thermal conductivity and resistance has been developed using common laboratory equipment. It has been applied to measure thermal conductivities of polymer films as thin as 12 μm, for which the time required for a single measurement was as short as 3 s. Thermal conductivities…
The coordination and bond character of the cations in amorphous SiO 2 ‐Al 2 O 3 films prepared by rf sputtering were examined by studying chemical shifts in the SiK and AlK X‐ray emission spectra. The coordination number of Si ions in these films was always 4, regardless of composition, whereas the average coordinatio…
Grüneisen numbers, which relate the change in the phonon mode frequency to the applied strain, can be estimated if all the second-order and third-order elastic moduli are known. Expressions for Grüneisen numbers are normally found in the literature for cubic and trigonal crystals only. In the present work, for the fir…
Abstract The reduction of In2O3 by H2 or CO and the reoxidation of the reduced oxide by water, accompanying the formation of hydrogen, have been investigated at ≥673 K. The reduction of In2O3 and the decomposition of water have been expressed by the forward reaction and the backward reaction respectively of this equat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNewton-Raphson approaches and generalizations in multiconfigurational self-consistent field calculationsDanny L. Yeager, Diane Lynch, Jeffrey Nichols, Poul Joergensen, and Jeppe OlsenCite this: J. Phys. Chem. 1982, 86, 12, 2140–2153Publication Date (Print):June 1, 1982Public…
Abstract Thin films of polypropylene were aged in air and in pure oxygen at pressures ranging from 0.051 to 4.24 MPa (7.4 to 614 psi) and temperatures from 60 to 90°C. Carbonyl formation resulting from polypropylene oxidation was monitored using infrared spectroscopy. The induction time for spectroseopically detectabl…
Causes of corrosion of metals and their alloys are reviewed. The corrosion mechanism is explained by electrochemical reaction theory. The causes and methods of controlling of both physiochemical corrosion and biological corrosion are presented. Factors which influence the rate of corrosion are also discussed.
Abstract Weatherability of several UV stabilized and unstabilized grades of LEXAN® polycarbonate (PC) was studied by exposure in a xenon arc lamp weather‐o‐meter. The tensile properties of thin (0.2 to 0.3 mm) compression molded and thick (3.4 mm) injection molded samples were investigated as a function of exposure ti…
The reflection spectra from a monodomain cholesteric liquid crystal are measured for obliquely incident light. The first order reflection region is found to be divided into three regions at a large angle of incidence. The central region shows high reflectivity irrespective of incident polarization and is attributed to…
Abstract Owing to their low cost phosphorus fire‐retardants find vast application in making fire‐retardant cellulosic compostions. They have been used both as a physical additive as well as part of the polymer structure. Acid forming phosphorus compounds are generally effective in cotton and other cellulosic. Acidic r…
Abstract The problem of dislocations emerging at free surfaces is considered. This complicated threedimensional elastic problem can be reduced to a superposition of two‐dimensional fields of infinite straight dislocations which are well defined. A plane fan‐shaped distribution of infinite straight dislocations is intr…
Line groups can be used in symmetry considerations of quasi-one-dimensional systems (as well as their spin subsystems), stereoregular polymers, chain-type crystals, etc. Each line group is expressed in the form of a weak-direct product of two of its subgroups. One of them is an axial point group, describing the symmet…