Materials Literature
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Fine‐scale fibers with diameters <100 µm were prepared using metal alkoxide precursors. Variables that influence fiber drawing and fiber properties in the lead zirconate titanate (PZT) compositional system were investigated to obtain the processing conditions necessary to fabricate high‐quality fibers. The gel‐to‐c…
Flash cooling of macromolecular crystals was investigated by measurement of the cooling rates achieved by different cryoprotectant solutions (glycerol, sucrose and polyethylene glycol) with different sample volumes (0.2–0.8 mm3) and by different cooling agents (cold nitrogen or helium gas, liquid nitrogen and liquid p…
Abstract The effect of processing conditions (essentially the flow conditions) on the mophology of incompatible, immiscible polymer blends was investigated. In simple shear flow the steady‐state mophology, that is, droplet size, of such blends is a single‐valued finction of the shear rate whenever a critical shear rat…
Tire and waste rubber recycling is a very important issue facing the rubber industry and science community. Compounding the ground rubber tire (GRT) with commercial polyolefins is a possible and effective way of used tire recycling which can provide new rubber/plastic blends at a much lower cost. In the present study,…
Up-conversion characteristics of Er3+ under 800 nm excitation are clarified for 30SiO2 ⋅15AlO1.5⋅28PbF2⋅22CdF2⋅(5−x)GdF3⋅xErF3 (x=0.3–5) transparent glass–ceramics, which are composed of fluoride nanocrystals and oxide glass matrices. Strong up-conversion emissions at around 525, 550, and 660 nm, and weak up-conversio…
Using ultrasonic methods, we determined the ambient‐temperature elastic constants of dense (99.7%) hot‐pressed polycrystalline 3:2 mullite (3Al 2 O 3 2SiO 2 ). We report the usual polycrystal elastic constants: Young's, shear, and bulk moduli, and the Poisson's ratio (nu). The Poisson's ratio (nu = 0.280) suggests int…
Abstract For complex rocks in which the structure of minerals, rather than their chemical composition, changes with progressive evolution of the system, it makes sense to try and monitor such an evolving system through the progressive change in the crystal structures of the constituent phases. In effect, the paragenet…
Mathematical Modeling of Oxygen Exchange and Transport in Air‐Perovskite‐Yttria‐Stabilized Zirconia Interface Regions: II. Direct Exchange of Oxygen Vacancies, Svensson, Ann Mari, Sunde, Svein, Nis¸ancioǦlu, Kemal
The compatibility of Al 2 O 3 and LaPO 4 at temperatures up to 1600°C is examined. Provided the ratio of La to P was close to 1:1, no reactions were observed after 200 h at 1600°C. Moreover, the Al 2 O 3 /LaPO 4 interface remained sufficiently weakly bonded to cause deflection of cracks, as reported previously. In the…
Abstract Crystal structure analyses, band calculations, and electrical resistivity and magnetic susceptibility measurements have been carried out for new θ-type BEDT-TTF [bis(ethylenedithio)tetrathiafulvalene; abbreviated as ET] salts, θ-(BEDT-TTF)2TlCo(SCN)4 and θ-(BEDT-TTF)2TlZn(SCN)4 [abbreviated as θ-TlCo and θ-Tl…
A metastable form of with ‐type structure (layered‐ ) was synthesized directly from by hydrothermal reaction at 220°C using aqueous mixed‐alkaline solutions such as or LiCl‐KOH. Relatively highly crystallized samples could be obtained by a one‐step process, compared with that of an ion‐exchanged sample obtained previo…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorSpontaneous Crystallization of the Planar Zigzag Form of Syndiotactic Polypropylene at 0 °CTakahiko Nakaoki, Yasumasa Ohira, Hisao Hayashi, and Fumitaka HoriiView Author Information Department of Materials Chemistry, Faculty of Science…
Edited by Gunter Effenberg, MSI. Critical Assessment of phase diagram data for 46 systems containing: Diagrams of binary and pseudobinary systems, liquidus surfaces, and isothermal sections Complete thermodynamic description and thermodynamic data sets for the most refractory systems (Ti, Zr, Hf, W) - B-C Thermodynami…
The adsorption of C 10 E 8 onto a clean air−water interface and the desorption out of an overcrowded interface due to a sudden shrinkage of a pendant bubble in a quiescent surfactant solution are studied. Video-enhanced pendant bubble tensiometry is employed for the measurement of the relaxation in surface tension. Re…
Langmuir monolayers of polydimethylsiloxane-polystyrene (PDMS-PS) diblock copolymers on dioctyl phthalate (DOP) at 22 °C are employed as a model tethered chain system in theta solvent conditions. The segmental concentration profile of the tethered PS block is obtained over an order of magnitude in both surface density…
Tin-doped indium oxide (ITO) films were deposited by dc magnetron sputtering using oxide (ITO) or alloy (IT) targets. The ITO films sputter-deposited using Ar at total pressure ( P tot ) lower than 1.2 Pa showed polycrystalline structure, whereas entirely amorphous films were deposited at P tot higher than 1.4 Pa, ind…
Stabilization of the cubic perovskite phase was demonstrated in the oxide system at x ⩾ 0.03. Oxygen permeability of solid solutions was independent of chromium content at x = 0.01 − 0.05. It was found that reducing ceramic grain size dimensions resulted in decreasing thermal expansion electrical conductivity, and oxy…
We investigate the polarization properties of holographic gratings in side-chain azobenzene polyesters in which an anisotropic grating that is due to photoinduced linear and circular birefringence is recorded in the volume of the material and a relief grating appears on the surface. A theoretical model is proposed to…
We report on a photoelectron spectroscopic study of monovanadium oxides, VOx− (x=1–4), at four photon energies: 532, 355, 266, and 193 nm. Vibrationally resolved spectra are obtained for VO− at 532 and 355 nm detachment photon energies. Two new low-lying excited states are observed for VO at 5630 and 14 920 cm−1 above…
Computer simulations have been used for many years to understand experimental high‐resolution electron microscope images in a qualitative fashion, but the trend nowadays has been to attempt more quantitative image matching. This has led to the discovery that the contrast in experimental images is much less than in sim…