Materials Literature
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Calcium is always present in alumina systems as an unintentional (or intentional) dopant, and yet the fundamental effect of its incorporation into the aluminas is not well understood, and is further complicated by the presence of Si. The synthesis of powders of two calcium aluminate phases (CaAl4O7, which is also know…
A demonstration-scale steam-assisted pyrolysis system was designed and tested for the treatment of the radioactive organic wastes which are difficult to incinerate such as halogenated organic compounds and phosphate esters. The steam-assisted pyrolysis system comprises a decontamination process for the gasification/se…
New catalytic oxidation reactions using N2O as an oxidant and a CoCl2 complex with 3-phenyl-5-(2-pyridylmethylidene)-2-thiohydantoin as a catalyst are described.
Different elastomer-based composites for microwave absorbers are developed. The influence of chemical character and structure of the polymer matrix and chemical nature and concentration of fillers with high values of the imaginary part of the complex dielectric permittivity and magnetic permeability on the microwave p…
Abstract The intercalation of avermectin (AVM) into sodium dodecyl sulfate (SDS) modified hydrotalcite‐like compounds (HTlc) was carried out using an evaporating solvent enhanced intercalation method to obtain AVM‐SDS‐HTlc nanohybrids. It was found that the nanohybrids could well control the release of avermectin, sho…
The abrasion resistance, pilling tendency, Lab values, K/S value and burst strength of fabrics with basic knitting structures of RL-jersey, RR-ribbed, RR-interlock forms produced from 100% combed cotton ring and compact yarns have been studied and compared. It is observed that the differences between the structures of…
The nanoporous <TEX>$F:SnO_2$</TEX> materials have been prepared through the controlled hydrolysis of fluoro(2-methylbutan-2-oxy)di(pentan-2,4-dionato)tin followed by thermal treatment at <TEX>$400-550^{\circ}C$</TEX>. The main IR features include resonances at 660, 620 and 540 cm-1. From the TG-DTG result, three main…
Calcite isocrinid ossicles from the Middle Jurassic (Bathonian) clays in Gnaszyn (central Poland) show perfectly preserved micro- and nanostructural details typical of diagenetically unaltered echinoderm skeleton. Stereom pores are filled with ferroan calcite cements that sealed off the skeleton from diagenetic fluids…
Additional data confirming the close relation between the Grüneisen parameter and the Poisson ratio are obtained. The estimate of the Grüneisen parameter based on the Leont’ev formula using the data on density, bulk compression modulus, and velocity of sound is in conformity with the results of calculations based on t…
A model of the interaction of a spherical gas bubble and a rigid spherical particle is derived as a coupled system of second-order differential equations using Lagrangian mechanics. The model accounts for pulsation and translation of the bubble as well as translation of the particle in an infinite, incompressible liqu…
In this article we review the concept of electron-beam-addressed high density phase-change nanoparticle memory, where information is written in the phase state of gallium nanoparticles by electron beam excitation, and read-out via measurements of cathodoluminescent emission. The high spatial resolution provided by a f…
Ammonolysis of vanadium sulfide leads to the formation of bixbyite-type vanadium oxide nitrides. Small amounts of nitrogen incorporated in the structure result in the stabilization of the bixbyite type not known for vanadium oxides. The crystal structure was investigated using X-ray diffraction and X-ray absorption sp…
We present a contribution to a new mode of scanning thermal microscopy (SThM) based on the use of thermoelectric junction operating in ac active mode. This is the first alternative to 3omega operating mode of a resistive SThM probe for measuring thermophysical parameters of materials at micro- and nanoscale. Whereas a…
This paper introduces the characteristics of the zinc oxide (ZnO) inorganic film deposited by radio-frequency magnetron sputtering as an alternative alignment layer for liquid crystal display (LCD) applications. The crystalline structure related to the texture formation of ZnO (101¯3) was observed with a tilt angle of…
The application of supercritical carbon dioxide for deposition of fluoropolymer coatings on various substrates and formation of superhydrophobic surfaces and composite core-shell microparticles was discussed.
Abstract An ideal shear strength of Gum Metal, a newly developed set of beta-type titanium alloys with the nominal composition Ti-24(Nb + V + Ta) – (Zr, Hf) – O (at.%) believed to deform without motion of crystal dislocations, has been investigated experimentally for precise determination. Tensile tests of single crys…
Over fifty years ago, Linstead and Elvidge described the syntheses of phthalocyanine-like macrocycles in which one or two of the interior metal-binding nitrogen atoms were replaced with aromatic C - H groups. We review here the coordination chemistry of two of these systems, dicarbahemiporphyrazine and benziphthalocya…
The recent situation in the development and application of nanostructured carbon materials is analyzed. Main research concepts for the synthesis of corpuscular porous bodies using nanosized carbon objects are examined. A review on scientific and technical investigations, devoted to developing nanoporous carbon nanomat…
Three simple capping molecules (urea, 3‐aminopropanol, and polyethylene glycol) with different functional groups (−NH 2 for urea, −NH 2 and −OH for 3‐aminopropanol, and −O− for polyethylene glycol) have been designed to prepare magnetite (Fe 3 O 4 ) particles with various shapes. The crystal structure, morphologies, a…
In the present study, various concentrations of ErF 3 -doped CaF 2 crystals were grown using the vertical Bridgman method. The Judd–Ofelt intensity parameters Ω t ( t = 2, 4, 6) for f–f transitions of Er 3 + ions were determined from optical absorption spectra. The concentration dependence of the intensity parameters…