Materials Literature
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Zinc oxide (ZnO) nanocrystals synthesized by an atmospheric microwave plasma torch are characterized in terms of the mixture ratio of N2 and O2 in the torch gas. Zinc (Zn) granules as a source material placed on the plasma reactor were evaporated and oxidized to ZnO immediately as soon as Zn granules were in contact w…
Insulation monitoring and diagnostic are the base of condition maintenance and essential for an economic usage of high voltage equipment. Electrical breakdowns in a small region of the insulating system are called partial discharge. The appearance and the intensity of these partial discharges are a quality criterion f…
Effects of the thermal treatment and the fabrication process of Pb(Zr0.3Ti0.7)O3 (PZT) thin films using chemical solution deposition on Pt∕TiOx electrode stacks were investigated using complementary analytical techniques including atomic force microscopy (AFM), x-ray photoelectron spectroscopy, high-resolution transmi…
A Comment on the Letter by Yun Liu et al., Phys. Rev. Lett. 95, 118102 (2005). The authors of the Letter offer a Reply.Received 15 December 2005DOI:https://doi.org/10.1103/PhysRevLett.96.219801©2006 American Physical Society
Abstract The effect of single-yarn twist and ply to single-yarn twist ratio on the evenness, hairiness and abrasion resistance of two-ply cotton yarn has been studied. The hairiness of two-ply yarn decreases as either the single-yarn or ply twist increases. The rate of reduction in hairiness with respect to twist is m…
ABSTRACT: We have evaluated the effect of electron beam irradiation (up to 20 kGy) on the functional and barrier properties of trans‐cinnamaldehyde‐coated low‐density polyethylene (LDPE)/polyamide films. Irradiation did not affect the tensile strength and toughness of the films, but the 20 kGy treatment increased the…
After years of painstakingly developing and testing the necessary materials, scientists are now looking to translate negative refraction into positive applications such as sub-wavelength, high-resolution imaging across the electromagnetic spectrum.
In a power cable, the main cause of dielectric breakdown is PDs in internal gaseous voids in the insulation. It is clearly desirable that the electric stress in such voids should be calculated in terms of the electric stress in the dielectric material. This paper presents the results of electric field distribution cal…
The corrosive behavior of mild steel in 0.05 M and 0.1M HCl, 0.025 M and 0.05 M H2SO4 solutions containing different concentrations of N-(2-thiophenyl)-N/-phenyl thiourea (TPTU) was investigated using potentiodynamic polarization technique. The results obtained reveal that TPTU is an efficient anodic inhibitor in the…
On an expanded and crushed vermiculite, changes in chemical, mineralogical, and rheological properties of the mineral affected by microbial activity were investigated. Determination of the water content, grain size, X‐ray diffraction pattern, intercrystalline swelling with glycerol, layer charge, CEC, exchangeable cat…
Pure and homogeneous nanopowders of Ba1− x Sr x TiO3 with compositions x = 0, 0.10, 0.20, 0.25, 0.30 and 0.35 were prepared by a polymerized complex method based on the Pechini-type reaction route, wherein mixed solutions of citric acid, ethylene glycol, titanium isopropoxide, barium carbonate and strontium carbonate…
BaZr0.1Ti0.9O3 ceramics with grain sizes of 0.75 and 2.60 µm have been prepared via solid-state reaction. Optimum parameters for calcination and sintering have been found in order to obtain pure perovskite phase, high density ceramics and homogeneous microstructures. The dielectric data show a diffuse phase transition…
Diffusion-controlled stepwise polymerization of a linear polymer confined in nanoscopic slits is simulated through a Monte Carlo approach. A noticeable influence of the confinement on the kinetics is found. The confinement modifies both the spatial pair distribution function and the diffusive properties of the polymer…
N-acetyl-L-ornithine transcarbamoylase (AOTCase) is a new member of the transcarbamoylase superfamily that is essential for arginine biosynthesis in several eubacteria. We report here crystal structures of the binary complexes of AOTCase with its substrates, carbamoyl phosphate (CP) or N-acetyl-L-ornithine (AORN), and…
The Eshelby tensor is formulated for anisotropic linear nonlocal elasticity and nonlocal micropolar elasticity in a nonhomogeneous medium.The divergence of this tensor gives the configurational forces on geometric and physical defects in such a medium.Some examples of the Peach-Koehler force and the Mathison-Papapetro…
A variety of factors have served to bring nuclear technology to international attention as a viable option to meet a major fraction of the energy needs of the future. This has also brought the US policy since 1977 of a once‐through nuclear cycle into question. Such a process uses only about 5% of the energy content of…
ZnO varistor materials were prepared by a sol gel route with subsequent drying and calcination. Varistor discs fabricated from these materials were subjected to a two step sintering schedule. Therefore in a typical experiment, the samples were heated to 1000°C, then allowed to cool for over 30 min to 900°C and held th…
Treloar’s vision [ J. Textile Inst. 56, T359-T380 (1965)] of an ideal fiber intersecting the cylindrical yarn at all radii with the same (mean) frequency is not accurate and consequently the derived model does not correspondent to reality. This paper introduces a modified model of radial fiber migration in yarns and i…
The tensile and impact behavior of jute fabrics—polyester composites–were evaluated as a function of the fabric style (knitted or weaved cloths), fiber weight fraction, and direction of the applied load. The tensile properties of plain-weave-fabric-reinforced composites (PWF) were higher than those of plain weft knit…
Abstract The thermal, mechanical and thermo‐mechanical properties of polymer compositions, containing synthetic biodegradable polymers i.e. polylacide (PLA) and aliphatic‐aromatic copolyester (BTA), natural biopolyester n‐PHB and its synthetic atactic analog (a‐PHB) were investigated. Thermal properties of the polymer…