Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The leaching of complex polyphase nuclear waste ceramics is described in the context of the geochemically established dissolution behavior of the constituent phases. Static leach tests conducted on ceramic monoliths in deionized water, in simulated silicate, and in brine groundwaters, conforming to Materials Character…
Abstract A non‐agglomerating 15 μm diameter stainless steel spherical powder was used as a filler in a low‐density polyethylene matrix. The factors investigated included volume loading, the use of surface treatments, and method of applying the surface treatments. The rheological parameters measured to analyze the effe…
Abstract The nickel arsenate KNiAsO 4 has a mica-like layer structure with surface charge densities similar to brittle micas. In contrast to micas it easily exchanges alkylammonium ions. The interlayers have paraffin-type chain arrangements, as in alkylammonium vermiculites and alkylamine smectites and vermiculites, b…
Abstract Naturally occurring ammonium illites have been discovered in black shales surrounding a stratiform base metal deposit in the DeLong Mountains, northern Alaska. Infrared spectra of the samples exhibit pronounced absorption at 1430 cm −1 , the resonant-banding frequency for NH 4 + coordinated in the illite inte…
Grain boundary corrosion of niobium bicrystals has been investigated using interference microscopy, and the corrosion correlated with the boundary energy. Penetration cusps (minima) were observed near the boundaries of the coincidence site lattice.
The room‐temperature strength distributions of a sintered and a hot‐pressed Si 3 N 4 were examined in the as‐machined condition, after oxidation at 1370°C and after oxidation under load at 1370°C. The strength‐controlling flaw populations were highly transient in nature. Both the duration of oxidation and the magnitud…
Melt rheology of poly(ethylene terephthalate)–polyamide-6,6, and their blends was studied between 240°C and 300°C, in capillary and rotational rheometers. The flow curves were determined in the range of rate shear from about 10−2to 105 (s−1). The results indicate a considerable degree of compatibility, presence of ass…
The mapping of the energy levels in metallophthalocyanines is accomplished by a combination of electrochemistry, electronic spectroscopy, and photochemistry. This chapter reviews the electrochemical properties of metallophthalocyanines and includes a large amount of previously unpublished data. The results are rationa…
ABSTRACT The effect of temperature on the silicon limited growth and nutrient kinetics of Stephanodiscus minutus Grun. was examined using batch and semicontinuous culture methods. Short‐term batch culture methods gave maximum growth rates which were essentially constant over the temperature range of 10° to 20°C (μ 3 =…
Abstract We have used the pulsed‐gradient spin‐echo technique to measure self‐diffusion in low‐molecular‐weight polymers in the melt and dissolved in identical polymers of high molecular weight. Specimens used were cis ‐polyisoprenes and polydimethylsiloxane. We find that, except for substantial free‐volume correction…
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…