Dielectric and Structural Properties of Relaxor Ferroelectrics
Recent results on dielectric spectroscopy of relaxor ferroelectrics are reviewed and analyzed in relation to the structural peculiarities and lattice dynamics.
Materials Literature
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Synthesis, structural, and magnetic characterization of substituted benzoimidazole-l-yl N,N′-dioxides
The crystal structures, EPR spectra and magnetic properties of the novel halogen- and cyano-substituted nitronyl nitroxide radicals 2-(2,6-dichlorophenyl)benzimidazolyl N,N′-dioxide, 6, 2-(2,6-difluorophenyl)benzimidazolyl N,N′-dioxide, 7, 2-(2-chloro-6-fluorophenyl)benzimidazolyl N,N′-dioxide, 8, 2-(2,3,6-trichloroph…
Electric‐field generation by gas–solid combustion
Abstract The combustion of metal particles may generate a temporal electrical field due to a difference in the electrochemical potential across the growing oxide shell, which usually is a mixed ionic electronic conductor. A novel measurement technique enables simultaneously measurement of the temporal electrical field…
Performance and Durability of Woven Fabrics Including Recycled Polyester Fibers
Textiles including polyester fibers made from recycled PET bottles have increased to be produced recently. We examined on performance and durability of woven fabrics that include recycled polyester fibers. First, forty-eight commercially available fabrics which include polyester fibers made from PET bottles were colle…
Translational self diffusion in 4-n-octyloxy-4′-cyanobiphenyl (8OCB) exploited with a static field gradient 1 H NMR diffusometry approach
Self-diffusion measurements along the phase director of the nematic and smectic A phase of the thermotropic liquid crystal 4-n-octyloxy-4′-cyanobiphenyl (8OCB) have been performed by 1H fringe field NMR diffusometry in the static fringe field of a superconducting magnet. The method used proves well suited to a precise…
Guest-dependent photochromism of 3,3′-bis-(4-fluoro-phenyl)-3H,3′H- [2,2′]biindenylidene-1,1′-dione in its inclusion crystals
Inclusion crystals of 3,3′-bis-(4-fluoro-phenyl)-3H,3′H- [2,2′]biindenylidene-1,1′-dione (1b) showed a reversible color change from yellow to red upon photoirradiation, although 1b itself did not show photochromic property in the solid state.
Factorization of products of discontinuous functions applied to Fourier–Bessel basis
The factorization rules of Li [J. Opt. Soc. Am. A 13, 1870 (1996)] are generalized to a cylindrical geometry requiring the use of a Bessel function basis. A theoretical study confirms the validity of the Laurent rule when a product of two continuous functions or of one continuous and one discontinuous function is fact…
Hydrogen bonding effect on photocurrent generation in porphyrin–fullerene photoelectrochemical devices
A hydrogen bonding effect on photocurrent generation has been evaluated successfully in a mixed film of porphyrin and fullerene with hydrogen bonding on an ITO electrode, which exhibits efficient cathodic photocurrent generation as compared to the reference system without hydrogen bonding.
Cationic lanthanide complexes of neutral tripodal N,O ligands: enthalpy versus entropy-driven podate formation in water
The cationic lanthanide complexes of two neutral tripodal N,O ligands, tpa (tris[(2-pyridyl)methyl]amine) and tpaam (tris[6-((2-N,N-diethylcarbamoyl)pyridyl)methyl]amine) are studied in water. The analysis of the proton lanthanide induced NMR shifts indicate that there is no abrupt structural change in the middle of t…
Cellular Uptake and Photocytotoxicity of Glycoconjugated Porphyrins in HeLa Cells¶
Abstract Thirty-two glycoconjugated porphyrins were synthesized by a modification of Lindsey method in the presence of Zn(OAc)2·2H2O as a template. The Zn2+ ion template strategy improved the yield about three-fold in the case of meta-substituted tetraphenylporphyrins. In addition, free-base porphyrins were obtained a…
Transient loads identification for a standoff metallic thermal protection system panel.
Standoff thermal protection system (TPS) panels are critical structural components in future aerospace vehicles because they protect the vehicle from the hostile environment encountered during space launch and reentry. Consequently, the panels are exposed to a variety of loads including high temperature thermal stress…
Hydrogen Embrittlement of Ultra High Strength Low Alloy TRIP-aided Steels
The amount of charged hydrogen and its effect on ductility in three kinds of ultra high strength low alloy TRIP-aided steels with different matrix structure were investigated. These TRIP-aided steels, especially the TRIP-aided steels with bainitic ferrite matrix, were charged hydrogen more than the conventional temper…
Fatigue Damage of Copper with Ultra-Fine Structure Due to ECAP
Although there are many studies on the microstructure of various metals with ultra-fine grain formed by ECAP (equal channel angular pressing), a few studies have investigated the fatigue characteristics of ECAPed metals. In the present study, 99.99% pure, oxygen-free copper was used. Before the ECAP process, the mater…
Global Rietveld refinement
Global optimisation methods of structure determination from powder diffraction data have risen to prominence in a relatively short space of time and they now constitute a key approach in the examination of polycrystalline molecular organic materials. A correctly formulated global optimisation approach may be regarded…
Changes in Hazardous Substances in Cotton after Mechanical and Chemical Treatments of Textiles
ICP spectrometry was used to analyse the content of heavy metals in 23 samples of cotton of various origins which had been processed in the Polish domestic industry. Furthermore, the content of pesticides and pentachlorophenol (PCP) in 20 samples of cotton of various origins was determined by means of the high-perform…
Use Properties of Terry Woven Fabrics
n Introduction The marketing conditions which prevail in today’s world market oblige manufacturers to constantly raise the level of usability and aesthetic features of terry products. Thanks to appropriate technologies and modern finishing methods, it is possible to create selected product’s features.
Diagnosis of Moisture in Oil/Paper Distribution Cables—Part II: Water Penetration in Cable Insulation–Experiment and Modeling
For Pt.I see ibid., vol.19, no.1, p.9-14, January 2004. Dynamics of water penetration in mass impregnated cable insulation has been studied. For experimental purposes, artificial damage has been inflicted to a 40-cm-long cable sample and water ingress has been continuously monitored by frequency response measurements.…
Fabrication and Characterization of W-Re-Os Alloys for Studying Transmutation Effects of W in Fusion Reactors
Tungsten (W) is a candidate material for plasma-facing components in fusion reactors. Large amounts of solid transmuted elements of W such as Re and Os will be produced under fusion neutron irradiation. In order to investigate the effects of transmutation products, a series of W-Re-Os alloys were fabricated by an arc…
Surface Pretreatments of Aluminum Alloy AA2024-T3 and Formation of Chromate Conversion Coatings
Surface Pretreatments of Aluminum Alloy AA2024-T3 and Formation of Chromate Conversion Coatings : II. Composition and Electrochemical Behavior of the Chromate Conversion Coating, Chidambaram, Devicharan, Clayton, Clive R., Kendig, Martin W., Halada, Gary P.
Proper Hot Filament CVD Conditions for Fabrication of Ti-Boron Doped Diamond Electrodes
Hot filament chemical vapor deposition (CVD) of boron-doped diamond films on Ti substrates was investigated under different conditions with CH 4 and H 2 as precursors. Accelerated life tests, and physiochemical as well as electrochemical characterization, were conducted to assess the qualities of the electrodes obtain…