Materials Literature
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Results of the TSL study of the main dosimetric peak region from BeO single crystals doped with boron or lithium impurities in different concentrations are presented. The TSL peculiarities at 420 K were interpreted in terms of the field fluctuation process model. It was suggested that in BeO over the region betwen 380…
Air flow in air jet weaving machines is complicated: it is unsteady, turbulent, and can be compressible or incompressible depending on the velocity. A separated flow model is developed to simulate air flow through the guide channel, which is half open and corrugated. Subsonic air flow in the guide channel is investiga…
Coordination of 4-OH-2,6-bis-(benzimidazol-2′-yl)pyridine (OH-bzimpy = H3L) with ironI(II) increases the acidity of the iminohydrogen atoms of the benzimidazole groups. The first three protonation constants (logKn) both for the free ligand, (OH-bzimpy) and the complex, [Fe(OH-bzimpy)2](ClO4)2 · 3H2O, were evaluated in…
Abstract The effects of EPDM admixture, mixing conditions and additional stabilization on the phase structure and impact strength of low‐density polyethylene/isotactic polypropylene (LDPE/PP) blends were studied. It was proved that EPDM is localized at the interface between LDPE and PP phases. The admixture of 5% EPDM…
Palladium membrane has been studied for sepration and purification of hydrogen isotopes because of its large permeability. In order to consider permeation of mixture of hydrogen isotopes, solubilities of protium and deuterium in palladium were studied in the temperature range of room temperature to 500°C using breakth…
Various mechanical and thermal properties of β′‐sialon ceramics, Si 6–z Al z O z N 8–z , prepared from aqueous slurries by a slip casting method were investigated as a function of Z values from 0 to 4. In the present study, Si 6–z Al z O z N 8–z occurred in the β′‐sialon crystalline phase only near Z = 1. The maximum…
High-pressure Raman studies on potassium–rare earth double molybdates, KDy(MoO4)2 and KY(MoO4)2, up to 35 GPa are reported. The Raman data indicate the occurrence of a reversible pressure-induced phase transition near 3 GPa, from the orthorhombic Pbcn phase. High-pressure x-ray diffraction measurements suggest that th…
The five benzene rings-containing (hereafter referred to as “five-ring”) dicarboxylic acids α,α′-bis[4-(4-carboxyphenoxy)phenyl]-1,4-diisopropylbenzene (p-III) and α,α′-bis[4-(4-carboxyphenoxy)phenyl]-1,3-diisopropylbenzene (m-III) were prepared by the fluoro-displacement of α,α′-bis(4-hydroxyphenyl)-1,4-diisopropylbe…
C. Zeitlin, L. Heilbronn, J. Miller, W. Schimmerling, L. W. Townsend, R. K. Tripathi, J. W. Wilson, The Fragmentation of 510 MeV/Nucleon Iron-56 in Polyethylene. II. Comparisons between Data and a Model, Radiation Research, Vol. 145, No. 6 (Jun., 1996), pp. 666-672
Tobermorites were synthesized from oxides and from fly ashes under mild hydrothermal conditions. The bulk compositions of the ash‐based formulations were adjusted to give the same [Ca]/[Si + Al] ratio as for the oxides. Selective Cs and Sr exchange with these tobermorites was measured. Compared to those prepared from…
One kind of distortion in P–E hysteresis of ferroelectric thin-film capacitors, namely vertical drift of P–E hysteresis loop, is discussed. This kind of distortion, usually observed in asymmetric ferroelectric thin-film capacitors, originates from the asymmetric conduction of the capacitor at different polarities. The…
Two-component polyurethane flame-retardant coatings were prepared by blending chlorine-containing modified polyesters (DCAOs) and polyisocyanate. DCAOs used were synthesized by polycondensation of dichloroacetic acid, a flame-retardant aliphatic carboxylic acid, with 1,4-butanediol, trimethylolpropane, and adipic acid…
Operation of novel avalanche semiconductor detectors, produced on the basis of heterojunctions Si-SiC and Si-Si/sub x/O/sub y/, is described. A uniform avalanche process with gain from 10/sup 3/ to 10/sup 5/ can be reached depending on the conductivity of the SiC and Si/sub x/O/sub y/ layers. Two types of avalanche ph…
The melting behaviors of selected compositions in the Si 3 N 4 ‐AlN‐Y 2 O 3 system were determined under 1 MPa of nitrogen. The phase diagrams of the ternary and their binary systems are presented. The lowest melting composition of the ternary system contains 15 mol % Si 3 N 4 , 25 mol % AIN, and 60 mol % Y 2 O 3 and…
The magnetic anisotropy and spin structure of κ-(BEDT-TTF)2Cu [N(CN)2]Cl are studied. The antiferromagnetic resonance-like signals are observed.
Abstract Liquid Adsorption Chromatography at Critical Conditions (LACCC) of polymers in combination with Matrix‐Assisted Laser Desorption / Ionization Time‐Of‐Flight Mass Spectrometry (MALDI‐TOF‐MS) and different types of detectors is a very convenient method for the characterization of polymer heterogeneities. A path…
Diffraction properties of an amplitude liquid crystal grating with a periodic electrode structure are studied under different polarizer configurations. Based on these experimental results, polarization characteristics of light diffracted from this grating are discussed. Both diffraction light intensities and polarizat…
The structure of the inorganic misfit layer compound (La 0.95 Se) 1.21 VSe 2 has been determined on the basis of a four-dimensional superspace group. The crystal is composed of an alternate stacking of VSe 2 sandwiches and two-atom-thick LaSe layers. The first subsystem VSe 2 has a distorted CdI 2 -type structure with…
Novel properties of recently developed conducting and insulating polymers and their composites are discussed. Properties of conducting polymer whose main chains are composed of unsaturated /spl pi/-bonds depend strongly on the main chain structure, substituent and also molecular dopants. Various applications of conduc…
We use the cathodoluminescence mode of a scanning electron microscope to investigate the depth and lateral dependencies of the electron-hole pairs generation by the electron beam in Al0.4Ga0.6As semiconducting material. A multiquantum well structure acts as a detector to measure the relative number of generated minori…