Materials Literature
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The specific heat of a single crystal of the layered perovskite ${\mathrm{La}}_{1.2}{\mathrm{Sr}}_{1.8}{\mathrm{Mn}}_{2}{\mathrm{O}}_{7}$ has been measured for $83<T<290\mathrm{K}.$ A high, narrow peak associated with the ferromagnetic ordering of the ${\mathrm{Mn}}^{3+}{\ensuremath{-}\mathrm{M}\mathrm{n}}^{4+}$…
The sintering behavior of synthetic diamond with a grain size of 2‐4 µm was investigated at high pressure and high temperatures (6.5 GPa and 1600°‐1900°C, respectively) in the presence of TiC 0.6 or TiC. No well‐sintered diamond composite was synthesized from a diamond‐TiC powder mixture under the examined conditions;…
From conformational analysis, we have determined the two lowest energy crystal structures for the hard segments of 4,4′-diphenylmethane diisocyanate/1,4-butanediol (MDI/BDO)-based polyurethane elastomer. Both crystal forms give prominent X-ray scattering at ∼7.6 Å. In one crystal form, (1), there is strong hydrogen bo…
Both the longitudinal (LA) Brillouin backscattering spectra and dielectric permittivities along the [001] direction have been measured as a function of temperature for relaxor-ferroelectric single-crystal ${(\mathrm{P}\mathrm{b}(\mathrm{Z}\mathrm{n}}_{1/3}{\mathrm{Nb}}_{2/3}{)\mathrm{O}}_{3}{)}_{0.905}{(\mathrm{P}\mat…
Solution mechanisms of P in peraluminous glasses and melts in the system CaO-Na 2 O-K 2 O-Al 2 O 3 - SiO 2 -P 2 O 5 have been examined with in-situ microRaman spectroscopy from ambient temperature to near 1200 °C. The principal aim was to examine the relative stabilities of phosphate complexes as functions of P conten…
The viscoelastic behavior of amorphous ethylene–styrene interpolymers (ESIs) was studied in the glass transition region. The creep behavior at temperatures from 15°C below the glass transition temperature (Tg) to Tg was determined for three amorphous ESIs. These three copolymers with 62, 69, and 72 wt % styrene had gl…
An alternative method to incorporate nanometer‐sized silicon carbide (SiC) particles into silicon nitride (Si 3 N 4 ) powder was proposed and investigated experimentally. Novolac‐type phenolic resin was dissolved in ethanol and mixed with Si 3 N 4 powder. After drying and curing, the resin was converted to reactive ca…
: Electron-excited X-ray maps recorded with the scanning electron microscope (SEM)/electron probe X-ray microanalyzer (EPMA) are a major method of presenting compositional information. Digitally recorded maps are processed in a variety of ways to improve the visibility of features. Scaling of the recorded signal to ma…
Abstract A novel ion exchange method of modifying mesoporous material, Al-FSM-16, has been found and applied to preparation of functional Al-FSM-16 containing Co-Salen inside the pores. The method is characterized in that the Co2+ ion exchange, which is followed by chelation with Salen H2, is performed in a nonaqueous…
In situ characterization of the chemical reactions in atomic layer deposition (ALD) processes in flow-type reactors is an important and challenging task. For this purpose, a quadrupole mass spectrometer has been integrated to an ALD reactor The special features of this setup are described and its performance is demons…
In this work, the relationships between composition and properties of Ny6/EVOH system were examined by means of several techniques and the results were interpreted in terms of level of compatibility. Blends of different ratio of Ny6 and EVOH have been processed in a laboratory-based film blowing extrusion apparatus. R…
We devised tubular hybrid medial tissues with mechanical properties similar to those of native arteries, which were composed of bovine smooth muscle cells (SMCs) and type I collagen with minimal reinforcement with knitted fabric meshes made of synthetic elastomers. Three hybrid medial tissue models that incorporated s…
Abstract A combination of molecular theories and chemical reaction kinetics was employed to study the molecular structure evolution in the ethylene vinyl acetate and dicumyl peroxide, EVA/DCP, and metallocene polyolefin elastomer, m‐POE/DCP crosslinking systems. Premixed EVA/DCP and m‐POE/DCP compounds were cured at d…
We investigated the origin of the imprint mechanism of ferroelectric thin films such as PbZr x Ti 1- x O 3 (PZT) or SrBi 2 Ta 2 O 9 (SBT) by considering thermionic field emission under local fields. The electric fields inside the ferroelectric films are represented. Since the poled ferroelectric capacitors have strong…
n-InSe and Er doped n-InSe (n-InSe:Er) single crystals were grown by the modified Bridgman-Stockbarger method. The prepared InSe and InSe:Er single crystal ingots were 12 mm in diameter and about 80 mm in length. The ingots had no cracks or voids on the surface. The absorption measurements were carried out for n-InSe,…
Abstract Rotational molding of foamed polyethylene has increasingly become an important process in industry because of its thicker walls, low sound transfer, high stiffness and good thermal insulation. However, the foaming process of polyethylene during rotational molding has not been well studied. The focus of this a…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTA Polyoxometalate Transfer Reagent: Synthesis, Structure, and Reactivity of Zirconocene Polyoxometalate [(PNbW11O40)2ZrCp2]6-Emil V. Radkov, Victor G. Young, and Robert H. BeerView Author Information Departments of Chemistry Fordham University, Bronx, New York 10458 Co…
The Channel-Spark method was used for deposition of highly oriented ferromagnetic La0.7Sr0.3MnO3 films on NdGaO3 substrates. It was found that additional oxygen decreases the film quality suppressing the Curie temperature and metal–insulator transition below room temperature. To achieve the best quality of the films t…
Icosahedral Al-Pd-Mn single quasicrystals were deformed between room temperature and 400°C by Vickers hardness testing. The surface morphology was investigated by profiling and scanning electron microscopy. Specimens were prepared for cross-sectional observation in transmission electron microscopes using a focused ion…
Improvements in the characteristic properties of jute-polypropylene composites were obtained with the application of MAH grafted PP copolymers as a coupling agent to the fiber. SEM investigations demonstrated that fiber pull-out is reduced after the modification with the coupling agent. This improved fiber-matrix adhe…