Materials Literature
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We have developed the series of thin-film bismuth layer structured ferroelectric (BLSF) materials such as SrBi 2 Ta 2 O 9 , SrBi 2 Nb 2 O 9 , SrBi 4 Ti 4 O 15 and their solid solutions using metallo-organic-decomposition (MOD) spin-on coating techniques. We found that SrBi 2 Ta 2 O 9 is one of the best potential candi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Silicon-Based Linker for Traceless Solid-Phase SynthesisMatthew J. Plunkett and Jonathan A. EllmanCite this: J. Org. Chem. 1995, 60, 19, 6006–6007Publication Date (Print):September 1, 1995Publication History Published online1 May 2002Published inissue 1 September 1995https…
Abstract The local structure of CH 3 NH 3 I around the I - ion in Phase α' and δ was studied by iodine K-edge EXAFS. The crystal structure in Phase α' was redetermined by single crystal X-ray diffraction. The Debye-Waller factor σ (2) derived from EXAFS spectra shows an anomalous behavior around the order-disorder tra…
The composite containment proposed aims to cope with beyond-design-basis accidents. The goal is to restrict the consequences of severe core meltdown accidents to the reactor plant. One essential of this new concept is passive decay heat removal from the containment by natural air convection.Experimental and calculatio…
Abstract This investigation focused on the study of dynamic mechanical losses in silica-filled networks of poly(dimethylsiloxane) (PDMS). Some of the samples were filled using a novel method, specifically the in situ precipitation of particulate silica either after or during network formation. Others were filled using…
Superplasticity of Ti-6Al-4V alloy specimens prepared by various routes of thermomechanical processing was evaluated by high temperature tensile tests. It was found that, to maximize superplasticity, the material should first be solution treated at 1050 °C and quenched into water to obtain needle-like a' martensite, a…
The rolling‐contact fatigue life and wear of CVD‐SiC coatings with surface compression were studied using a three‐ ball‐on‐rod rolling‐contact fatigue (RCF) tester. Two levels of surface compression in the coatings, approximately 190 μm thick, were introduced by using substrates of a liquid‐phase sintered SiC and a Si…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMethane Oxidative Coupling: Technical and Economic Evaluation of a Chemical Cogenerative Fuel CellDouglas Eng, Po-Hung Chiang, and Michael StoukidesCite this: Energy Fuels 1995, 9, 5, 794–801Publication Date (Print):September 1, 1995Publication History Published online1 May…
Abstract This paper reviews three flexible PVC formulations using various types of alumina trihydrate (ATH) and magnesium hydroxide [Mg(OH) 2 ]. Smoke values are compared. In two of the formulations, Mg(OH) 2 has better smoke values than ATH; in a third formulation, ATH has better smoke values than Mg(OH) 2 . However,…
Abstract 3‐Methyl‐1,3‐pentadiene has been polymerized with the Al(C 2 H 5 ) 2 Cl/Nd(OCOC 7 H 15 ) 3 /Al[CH 2 CH(CH 3 ) 2 ] 3 system to crystalline polymers consisting essentially of cis‐1,4 units (≥80%). NMR examination has shown that the polymers have an isotactic structure. This conclusion was confirmed by X‐ray ana…
The Fr\'eedericksz transition is a nonuniaxial, nonchiral nematic liquid crystal (LC) in the presence of the electric E field is considered using the Curie symmetry principle. All possible symmetries of (i) the LC point symmetry group ${\mathit{G}}_{\mathit{N}}$, (ii) the strong boundary LC orientation at the infinite…
An approach to quantitative evaluation of surface plasmon resonance (SPR) measurements is given. In order to determine thicknesses and refractive indices, measured SPR curves were fitted numerically with a theoretical model based on the Fresnel equations. The model also takes into account additional roughness layers,…
The morphology of (0112) twins studied in Zn is described as well as interfacial defects. Twin boundaries are usually made up of three types of interface: straight parts parallel to the K1 (0112) composition plane, growing parts involving a series of geometrically well defined steps separated by (0112) boundary portio…
The influence of the microstructure and the grain boundary potential barrier layer on the electrical breakdown of barium titanate positive temperature coefficient (PTC) ceramics was studied. Samples of various grain sizes were prepared by adjusting the amount of Sb substitution into Ba sites in barium titanate PTC cer…
Article Erfahrungen mit der quantitativen Bestimmung der Versetzungsdichte im Transmissionselektronenmikroskop / The Quantitative Measurement of Dislocation Density in the Transmission Electron Microscope was published on September 1, 1995 in the journal Practical Metallography (volume 32, issue 9).
Abstract Silyl trifluoromethanesulfonates are inactive for the polymerization of cyclosiloxanes in the complete absence of trifluoromethanesulfonic (triflic) acid, but polymerization occurs in its presence. Using a triflic ester as tagged silyl triflate (benzyldimethylsilyl triflate) the degree of polymerization ( DP…
Abstract Forensic investigations have been using fiber scanning electron microscopy to identify the cause of textile damage. This study was modeled after previously documented cases with the aims to create fabric damage under a known series of conditions, to examine the fiber's fracture morphology, to photograph SEM f…
The electron distribution in the coenzyme-substrate adduct of aspartate aminotransferase was changed by replacing active-site Arg386 with alanine and introducing a new arginine residue nearby. [Y225R, R386A]Aspartate aminotransferase decarboxylates L-aspartate to L-alanine (kcat = 0.04 s-1), while its transaminase act…
Single crystals of sodium metaperrhenate, NaReO 4 , have been obtained by oxidation of rhenium metal with sodium nitrate under high pressure- high temperature conditions (modified Belttype apparatus, 4 kbar, 400 °C, Au-capsules). The crystals are tetragonal, space group I4 1 /a, with a = 5.3654(4), c = 11.732(2) Å and…
Measurements of free surface velocity profiles of high-purity titanium samples under shock-wave loading were performed to study the dynamic strength and phase transition parameters. The peak pressure of the initial compression waves was within the range of 4 to 40 GPa, and the load duration was vaned between 10−8 and…