Materials Literature
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Water sorption in sulphonated polyimides with or without ionic block structure was analysed with Feng's new dual mode model. The effect of their molecular structure that determines the chain organisation in the solid materials was analysed by using the model parameters. The model parameters Cp and A' correspond to the…
Abstract We report a new occurrence of thorianite from syenitic pegmatite near Bhaluchuan, Sambalpur district, Odisha. The thorianite is brown to deep-brown with round grains of 2 to 10 mm size. The chemical analysis of the investigated thorianite reveals 64.8% ThO2, 25% U3O8, 3.81% PbO and 1.7% Fe2O3. Calculated stru…
The thermo-stimulated luminescence of γ-irradiated commercial polytetrafluoroethylene (PTFE) was explored. There are up to four intense maxima in the luminescence curves of different formulations of PTFE. The position and number of maxima remain constant at doses up to 30 kGy. The differences of the glow curves in the…
Though there are a numerous methods for chemical synthesis, biogenic synthesis of nanoparticles offers an attractive alternative to chemical synthesis methods. Therefore scientists are continuously engaged in searching hazard free, environment friendly methods of synthesis of nanoparticles with tailor-made structural…
The effects of Pr6O11and Er2O3dopants on microstructure and mechanical properties of zirconia ceramics were investigated. The phase composition and microstructure analysis indicate that samples are all tetragonal phase and grain size is about 50-100 nm. The relative density of zirconia ceramics was above 99.1%, linear…
Porous silicon nitride (Si3N4) ceramics green were prepared by sol-gel and freeze drying processing. Al2O3and MgO were selected as sintering additives. Porous Si3N4ceramics were sintered at 1200~1300 °C. The porosity of porous Si3N4ceramics reached 60~80%, the pore size of porous Si3N4ceramics dried by freeze drying i…
The magnetic characteristics of a film under the effect of an external indenter have been studied. It has been shown that magnetoelastic interactions induce additional magnetic anisotropy, which can be either positive or negative, depending on the values of the magnetoelastic constants. The effect of the geometrical p…
In current article, applications of pulsed electromagnetic fields (PEMF) for processing of powder parts obtaining bronze coating on a steel rod are presented. Experiments were carried out in Laboratory of Metal Forming Technology (University of Applied Sciences of Zwickau, Germany) and in Laboratory of Powder Material…
Y. Q. Liu, P. A. Hu and co-workers reveal on page 1559 a strategy for enhancing the performance of graphenebased devices by using an hexagonal boron nitride (h-BN) monolayer grown by chemical vapor deposition (CVD) as a dielectric layer. The strategy allows for effective size control of single-crystal monolayer h-BN d…
The photovoltaic effect due to the photogeneration of charge carriers at the interface in organic polymeric p-n-heterostructures based on the developed composites with hole (doped polyimides, conjugated polymers) and electron (doped polyetherimides and carbazolyl-containing polymers) conduction was observed and studie…
This paper proposes an optical layout for a monolithic spectrograph with a transmissive holographic diffraction grating. All the elements of such a layout are located on the surface of a single block of transparent material. Such an approach allows the design of the device to be simple and reliable and makes it possib…
The transient response of the high-temperature gas-cooled reactor (HTGR) to depressurized loss of forced circulation combined with failure of all reactor trip systems, a beyond-design-basis accident, is analyzed for an extended period of time during which no active core cooling is resumed. The characteristic behavior…
Currently, the aircraft industry is shifting toward the use of new aircraft skin materials. In place of aluminum, aircraft are now being constructed from composite materials, which typically include combustible components. The objective of this test series was to quantify the small-scale burn characteristics of two ne…
Transport properties of Ce1−xLaxB6 and Ce1−yYyB6 were measured. Resistivities above 4 K show the Kondo like behaviour with the similar scaled form. In the ordered region the resistivities change from T4 to T2 with decreasing temperature. The latter seems to be due to incoherent Kondo scattering around impurities and t…
In this scale-up study, we examined the effects of using varying amounts of fibers with reduced xylan content in paper. Bleached birch kraft pulp was partially or fully replaced by alkali-extracted pulp, and the effects of this replacement on the wet end chemistry of the paper machine and the resulting paper propertie…
The buildings made of monolithic reinforced concrete currently enjoy great popularity. Along with a great number of advantages of monolithic building, which are repeatedly listed in the works of many authors, there are many unexplored issues which require detailed consideration. The technological concrete joints are a…
Starch nanocrystals obtained from acid hydrolysis, and the starch/natural rubber latex film was prepared by blending the starch nanocrystals with natural rubber latex. The latex properties such as viscosity and mechanical stability, water and toluene uptake, crosslinking density and mechanical properties of the latex…
In this work the results of investigations for (BiFeO3)x(BaTiO3)1-xand Bi1-xNdxFeO3solid solutions are described. Samples were prepared by the conventional solid-state sintering method. X-ray diffraction,57Fe Mössbauer spectroscopy, and magnetoelectric effect measurements were applied as complementary methods to dete…
This invited presentation will review our recent research activities related to reflectarray antennas [1-9]. First, beamscanning reflectarrays with additional reconfiguration capabilities in polarization or frequency will be discussed, as well as arrays operating over multiple polarizations or frequencies. Second, ini…
Spider silk displays incredible strength and elas¬ticity for its size and weight.[1] These properties have sparked interest in determining the protein structures of the silk fibers allowing for the pro¬duction of synthetic silks.[2] This study compares the mid-infrared (Mid IR) spectra of silk from five different spid…