Materials Literature
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A pseudo-Fourier modal analysis method for analyzing finite-sized dielectric slabs with arbitrary longitudinal permittivity and permeability profiles is proposed. In the proposed method, the permittivity and permeability profiles are represented by the Fourier expansion without using the conventional staircase approxi…
AlN-SiC ceramics with 0 to 75 mol% of AlN were fabricated through pressureless sintering of very fine AlN and SiC. Powder compacts with different amounts of AlN were fired at 2000°C for 1 h in Argon gas flow using an induction-heating furnace. The microstructure and phases present in the products were evaluated using…
Optical properties of birefringent porous silicon (b-PSi) layers are studied by means of the density functional theory (DFT) within the local density approximation (LDA). A systematic study of crystalline silicon (c-Si) is performed in order to validate this DFT-LDA calculation of optical properties of semiconductors.…
Volume is indexed by Thomson Reuters CPCI-S (WoS).This book contains more than 200 papers; all dealing with recent research findings related to engineering ceramics and associated materials. Particular emphasis is placed on the consideration of novel technical challenges and innovative technologies in advanced enginee…
The microstructure, ferroelectric, and dielectric properties of vanadium-doped Bi4Ti3O12 ceramics have been investigated. V substitution is found to cause a transition from an orthorhombic phase to a tetragonal phase at x∼0.03, and again to an orthorhombic phase at higher V content. The ferroelectric properties of Bi4…
Vacancies are known often to be the dominant type of point defects in perovskite oxides, but their presence can rarely be directly determined. Positron annihilation methods have unique sensitivity to vacancy-related defects and the variable energy positron beam (VEPB) techniques allow near-surface depth profiling. The…
We compare the performance of polymer-stabilized cholesteric liquid crystal diffraction gratings for two limits of the polymer morphology: a one-dimensional array of polymer walls that extend through the grating thickness (“bulk network”), and a thin layer of patterned polymer fibrils localized at one surface (“surfac…
We study a model for corrosion and passivation of a metallic surface after small damage of its protective layer using scaling arguments and simulation. We focus on the transition between an initial regime of slow corrosion rate (pit nucleation) to a regime of rapid corrosion (propagation of the pit), which takes place…
So gut wie neu: Rh- und Pt-haltige Katalysatoren auf Perovskit-Basis wurden für die Verwendung in Systemen zur Kontrolle von Autoabgasen entwickelt. Diese Katalysatoren regenerieren sich selbst und könnten so zur Verringerung des Edelmetallbedarfs führen. Die Abbildung zeigt das TEM-Bild von Pt-Körnern auf dem Katalys…
Hole transport has been investigated by the time-of-flight method for the hexagonal columnar phase of a discogen containing a strongly dipolar nitro substituent; 1-nitro-2,3,6,7,10,11-hexakis(hexyloxy)triphenylene (HAT6-NO2). Unlike the corresponding unsubstituted system, 2,3,6,7,10,11-hexakis(hexyloxy)triphenylene (H…
A relatively simple model has been developed to study the magnetoelectric effect of magnetostrictive/piezoelectric dilute particulate composites. For illustrative purpose, we calculate the magnetoelectric voltage coefficients of particulate composites of NiFe2O4 and lead zirconate titanate. By treating the inclusion/m…
Abstract The melt blending of polypropylene‐ blend ‐polyamide 6‐ blend ‐organoclay (PP/PA6/organoclay) systems has been investigated using an internal mixer without any traditional compatibilizer. In the presence of organoclay, the melting of PA6 phase is accelerated and the dimension of the dispersed phase in the mat…
BACKGROUND: Essential to tissue-engineered vascular grafts is the formation of a functional endothelial monolayer capable of resisting the forces of blood flow. This study targeted alpha2(VIII) collagen, a major component of the subendothelial matrix, and examined the ability of and mechanisms by which endothelial cel…
Thermally robust materials of the M(5-X-pyrimidin-2-olate)2 type [M = Co, X = Cl (1(Cl)), X = Br (1(Br)), X = I (1(I)); M = Zn, X = Cl (2(Cl)), X = Br (2(Br)), X = I (2(I))] have been synthesized. Their X-ray powder diffraction structural characterization has revealed that they crystallize as I2d diamondoid frameworks…
Multi Wall Carbon Nanotubes (MWCNTs) with a diameter of 20-30 nm were used as a conductive phase to add electric conductivity to yttria stabilized tetragonal zirconia (3Y-TZP). Almost fully dense 3Y-TZP/MWCNTs nanocomposite was obtained by pressureless sintering under inert atmosphere and Hot Isostatic Pressing (HIP)…
The rate coefficients for electronic transitions between the 3 P and 1 D states of oxygen atoms induced by collision with hydrogen atoms are computed using a rigorous quantum mechanical method and accurate interaction potentials of the OH molecule. The rate coefficient for the electronic relaxation of O( 1 D ) to O( 3…
We have simultaneously measured the carrier-to-noise ratio (CNR) as well as the transmitted and reflected light intensities from platinum oxide based super-resolution near-field structure (PtOx super-RENS) disks. The the reflected and transmitted light intensities were found to decrease and increase, respectively, as…
Soluble precursor powders for TiO 2 -coating solutions were prepared and dissolved in solvent mixtures containing ethanol and 1,5-pentanediol in different ratios. Materials isolated by rotational evaporation of the sols (sol powders) and scraping of films deposited by dip-coating (film powders) were annealed at differ…
Thermal diffusion was used to dope Co atoms into ZnO single crystal. Particle-induced x-ray emission combined with channeling technique, x-ray diffraction, and ultraviolet-visible light absorption show that Co-diffused ZnO is pure single-phase alloy. The temperature variation of magnetization can be fitted by a linear…
The effects of shock loading on compressive yield strength are presented for several aluminum materials. These include commercially pure aluminum 1060, ultrapure aluminum, pure aluminum single crystal of [100] and [111] orientations, and aluminum alloy 6061-T6. The yield strength of these materials was measured by a c…