Materials Literature
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The novel hydroxyquinoline-containing tetrapodal ligand forms water soluble and stable chelates and is a good sensitizer of the NIR luminescence of its Nd(III) and Yb(III) complexes; its easy synthesis opens the way for potential biomedical applications.
The primary focus of this paper is on the establishment of reliable methods for the determination of the mechanism and kinetics of the oxygen reduction reaction (ORR) at solid oxide fuel cell cathodes consisting of lanthanum strontium manganite in a 50 vol % mixture with yttria-stabilized zirconia electrolyte (LSM-YSZ…
Glow peaks of PbWO4 below 110 K are intense and may arise from unspecified intrinsic defects whereas those above 154 K may be related to oxygen sites. TL emission spectra of as-grown PWO are considered to arise from the WO3 associated with oxygen vacancies and those of annealed PWO may be from the WO42– complex intera…
Decomposition of calcium carbonate in the temperature range 1180–1353 K was investigated by employing a thermogravimetric analysis system, an X-ray diffractometer, a scanning electron microscope and a surface area analyzer. Experimental results indicated that calcium carbonate decomposed almost completely in 210 s und…
Zinc electrodeposits are widely used to protect iron \nand steel from corrosion. Zinc coatings are presently \nobtained from chloride, sulfate, mixed chloride and \nsulfate, cyanide and non-cyanide alkaline baths. \nAtmospheric corrosion is associated with the use \nof chloride electrolytes. The us…
Ultrasonic attenuation coefficients are calculated due to phonon-phonon interaction and thermoelastic mechanism in Ni-Pd alloys at 100-500 K along 100 direction.Second and third order elastic constants (SOEC and TOEC), Grüneisen numbers and ultrasonic velocities are also calculated.The ultrasonic attenuation is determ…
Sulfur levels in both gasoline and disel fuels are being restricted because of environmental pollution concerns throughout the world. The U.S. Environmental Protection Agency has mandated the levels of sulfur which may be allowed in most road and off-road vehicles. Although there are many standard test methods availab…
The rate of cavitation with superplastic strain was investigated for a superplastic AZ61 magnesium alloy at a strain rate of 2×10−4 s−1 and temperature of 648 K, under the conditions of which an elongation of more than 250% has been found. Cavities initiated at grain boundaries. The cavitation showed a growth perpendi…
10.1360/982005-349
Poly(ethylene-co-vinylacetate) (EVA) was mixed with sodium montmorillonite (MMT) at 90/10 wt. ratio. EVA was also mixed with an organophilic montmorillonite (o-MMT) prepared by replacing Na+ in MMT with trimethylstearylammonium cation. The structure and mechanical properties of the composites were studied by scanning…
The first mesoionic nematic and smectic A mesogens derived from sydnones that are characterized by both covalent and ionic features have been synthesized and evidenced by optical, calorimetric and X-ray diffraction studies.
When produced under reducing conditions, beta-Ga2O3 is transformed into an n-type semiconductor with delocalized conduction electrons that exhibit a very strong electron spin resonance (ESR) and a strong hyperfine coupling to the gallium nuclei of the host lattice. We apply the Overhauser-shift technique to investigat…
The defoliation properties of galvannealed coating, so-called powdering and flaking, in a commercial continuous galvanizing line were investigated by scanning electron microscopy, X-ray diffraction, a roughness profiler and deep drawing test. Both aluminum content in molten zinc and galvannealing temperature were foun…
A field distribution in a rectangular waveguide filled with anisotropic single-negative (SNG) metamaterial is analyzed theoretically, numerically and experimentally. A highly simplified scenario with ideal lossless, continuous (either mu-negative (MNG) or epsilon-negative (ENG)) filling material is used in theoretical…
Widely adopted around the world, Engineering Materials 1 is a core materials science and engineering text for third- and fourth-year undergraduate students; it provides a broad introduction to the mechanical and environmental properties of materials used in a wide range of engineering applications. The text is deliber…
From the view point of both science and technology, it would be interesting and useful to examine the optical properties of isolated silicon nanocrystals (nc-Si) embedded in SiO2 matrix. A good understanding to optical properties of the nc-Si is definitely important to both the quantum physics and the applications esp…
Abstract We present a quantum chemical analysis of the molecular structure and first hyperpolarizabilities of a series of stilbazolium ions and compare their results with corresponding neutral molecules. The molecular geometries are obtained via B3LYP/6‐31G** optimization, including the self‐consistent reaction field/…
The increasing interest in left-handed medium (LHM) requires a formulation capable of a full analysis of wave propagation in such materials. However, the conventional perfectly matched layer (PML) absorbing boundary condition (ABC) is unstable when it is extended to truncate the boundary of LHM. This is a consequence…
Multiferroic materials where ferromagnetism and ferroelectricity coexist are rare. We have succeeded in synthesizing new multiferroic materials Bi2M MnO6 (M = Ni, Co) at high pressure of 6 GPa. The crystal structures of these compounds are a heavily distorted double-perovskite (space group C2), with M 2+ and Mn4+ ions…
Polymer-laminated electrochromic devices composed of WO 3 and Ni͑OH͒ 2 films were fabricated on indium tin oxide ͑ITO͒coated glass and polyethylene terephthalate ͑PET͒ substrates.In each of the devices, data on the transmittance modulance, coloration efficiency, and response time were collected.The transmittance modul…