Electrodeposition of ZnS Films from an Alkaline Bath
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Thermal Energy Generated by Entropy Change in Solid Oxide Fuel Cell
The Seebeck coefficients of oxygen and hydrogen electrodes on a stabilized zirconia at 1273 K were estimated to be −0.303 and 0.265 mV K −1 , respectively. Thus, the entropy changes of oxygen and hydrogen electrodes at 1273 K were calculated to be −58.4 J/1/2 mole oxygen in air and 51.1 J/1 mole hydrogen in a gas mixt…
Alumina Monolith Formation by Flocculation of Boehmite Sols
Flocculating a boehmite sol with ammonia results in drying and shrinkage uniformity which contributes to the formation of a dry monolithic gel. It is demonstrated that flocculation immobilizes the randomly dispersed platelet‐shaped boehmite particles, inducing uniform shrinkage and density in the gel structure. Floccu…
Influence of Oxidation Treatments on Surface Properties and Reactivities of Short‐Range Ordered Precipitation Products of Aluminum
Abstract Organic C contents, specific surface and P adsorption of pseu‐doboehmites or x‐ray noncrystalline precipitation products of Al formed in the presence of various organic ligands (citric, tartaric, tannic or aspartic acid) and Cl were studied before and after oxidation treatment of NaOCl or H 2 O 2 . Contents o…
Optimization of the off-states for single-layer and double-layer general twisted nematic liquid-crystal displays
The Jones matrix representation is used to obtain an analytic closed-form expression for the optical transmission of a general double-layer twisted nematic (TN) liquid-crystal display with arbitrary twist angles and uniform pretilt angles. Based on this result, the optimum off-state design criteria for both single-lay…
Nonequilibrium calcium oxide-magnesium oxide solid solutions produced by chemical decomposition
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNonequilibrium calcium oxide-magnesium oxide solid solutions produced by chemical decompositionGiorgio Spinolo and Umberto Anselmi-TamburiniCite this: J. Phys. Chem. 1989, 93, 18, 6837–6843Publication Date (Print):September 1, 1989Publication History Published online1 May 20…
The effect of electrolyte‐controlled growth morphology on the charge transport properties of poly(3‐methylthiophene)
Abstract Poly(3‐methylthiophene) films were potentiostatically and galvanostatically synthesized on platinum electrodes in acetonitrile using lithium perchlorate, lithium tetrafluoroborate, tetra‐ n ‐butylammonium perchlorate, and tetra‐ n ‐butylammonium tetrafluoroborate as supporting electrolytes. Cyclic voltammetri…
Investigation of “Current Doubling” Mechanism of Organic Compounds by the Rotating Ring Disk Electrode Technique
The photo‐oxidation mechanisms of methanol, formaldehyde, and formic acid, which are potentially “current‐doubling agents,” were investigated using the RRDE technique. The disk electrode was n ‐ TiO 2 and was illuminated by a xenon lamp while the ring electrode was Pt. Hydrogen ion, generated at the disk during the ox…
Neue Verbindungen Ag2HgMX4 mit Wurtzstannitstruktur / New Compounds Ag2HgMX4 with the Wurtzstannite Type Structure
Three new compounds, Ag 2 HgGeS 4 , Ag 2 HgSnS 4 , and Ag 2 HgSnSe 4 , crystallizing in the wurtzstannite type structure have been prepared by solid state reactions at 700°C and characterized by X-ray powder methods. A fourth compound of similar composition Ag 2 HgGeSe 4 , with an hitherto unknown structure crystalliz…
The microstructures of commercially available poly(3-hydroxybutyrate-co-3-hydroxyvalerate)s
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe microstructures of commercially available poly(3-hydroxybutyrate-co-3-hydroxyvalerate)sYoshio Inoue, Naoko Kamiya, Yasuhiko Yamamoto, Riichiro Chujo, and Yoshiharu DoiCite this: Macromolecules 1989, 22, 9, 3800–3802Publication Date (Print):September 1, 1989Publication Hi…
Hot Isostatic Pressing of a Presintered Yttria‐Stabilized Zirconia Ceramic
The effect of hot isostatic pressing on the bend strength of ZrO 2 –3 mol% Y 2 O 3 was critically dependent on the presintering process. Optimally sintered bodies contained no open porosity and exhibited large increases in strength following hot isostatic pressing. When open porosity of as little as 0.3% persisted aft…
Microhardness of Mullite at Temperatures to 1000°
The microhardness of mullite single crystals was measured at temperatures to 1000°C. The hardness decreased from about 15 GPa at room temperature to about 10 GPa at 1000°C. Thus, the mullite at 1000°C had a higher hardness than sapphire, approaching the value of SiC, but at room temperature was softer than both materi…
Duplex stainless steels for osteosynthesis devices
The austenitic stainless steels used today for the manufacture of osteosynthesis devices are sensitive to crevice corrosion. In this study the corrosion properties of some duplex stainless steels were evaluated and compared to traditional austenitic stainless steels. According to our results the following ranking was…
Dielectric measurements of the proton-glass state inRb0.65(NH4)0.35H2AsO4
Dielectric measurements of the ${\mathrm{Rb}}_{1\mathrm{\ensuremath{-}}\mathrm{x}/\mathrm{e}\mathrm{m}\mathrm{p}\mathrm{h}>(\mathrm{N}{\mathrm{H}}_{4}}$${)}_{\mathrm{x}}$${\mathrm{H}}_{2}$${\mathrm{AsO}}_{4}$ (x=0.35) mixed crystals in the a and c tetragonal directions in the temperature range from 3 to 300 K are r…
High Temperature Deactivation of Three-Way Catalyst
<div class="htmlview paragraph">An increasingly important step in the design of three-way catalytic converters is having the ability to evaluate deactivation of potential catalyst formulations with accelerated testing. Most accelerated tests involve deactivating the catalyst by thermal (i.e., high temperature) a…
Atomic ordering and the order parameter functional method
An order parameter functional method is proposed which permits description of structural order-disorder phase transitions. A feature peculiar to the method is that the probabilities of all atomic groups (clusters) are represented in terms of a distribution function that is immediately related to the long-range order p…
Nafion‐like thin film plasma‐polymerized from perfluorobenzene/SO2 mixture
Abstract Plasma polymerization of perfluorobenzene/sulfur dioxide (PFB/SO 2 ) mixture was investigated by elemental analysis, infrared spectroscopy, and XPS. Plasma polymer films like Nafion were obtained from the plasma polymerization of PFB/SO 2 mixture. The plasma polymerization deposited fluoropolymers with sulfur…
Properties of three types of crosslinked polyethylene
Abstract The same base resin, a HDPE with vinyl–silane units grafted along the backbone, was subjected to three different types of crosslinking: (a) using peroxides and heat, (b) using a catalyst under high humidity, and (c) using high‐energy radiation. Macroscopic properties, such as tensile behavior‐at‐break, shear…
Device for Producing Staple-Core / Cotton-Wrap Ring Spun Yarns
This paper describes a device that effectively produces a unique staple-core/cotton- wrap composite yarn on a slightly modified ring spinning frame. Such a yam consists of a man-made staple fiber core that is wrapped with cotton fibers. The core provides high strength and other functional characteristics, while the wr…
Ionic conductivity and the phase transitions inNa2SO4
The electrical conductivity of single crystals of ${\mathrm{Na}}_{2}$${\mathrm{SO}}_{4}$ has been measured along the three principal crystallographic axes at temperatures in the range 160--400 \ifmmode^\circ\else\textdegree\fi{}C. The measurements reveal a hitherto unsuspected large anisotropy in the ${\mathrm{Na}}^{+…