Materials Literature
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Hybrid composite films made of an organic polymeric matrix and an inorganic nanosized filler, namely titania prolate nanoparticles, have been prepared and characterized both thermally and mechanically. The filler content has been varied, while still being kept in the regime of unsaturated, homogeneous nanocomposites.…
The solubility of potassium iodide in ethanol + water binary solvent was measured over the entire composition range from 0 to 1 weight fraction of ethanol at (298.15, 303.15, 308.15, and 313.15) K. The densities of the saturated solutions are also reported. Equations are given for the solubility and density of the sat…
The 2 : 1 cation radical salts of bent donor molecules of ethylenedithio-tetrathiafulvalenoquinone-1,3-dithiolemethide (EDT-TTFVO), ethylenedithio-diselenadithiafulvalenoquinone-1,3-dithiolemethide (EDT-DSDTFVO), ethylenedithio-diselenadithiafulvalenothioquinone-1,3-diselenolemethide (EDT-DSDTFVSDS), ethylenedioxy-tet…
Based on ab initio total energy calculations, the diffusion mechanisms of group-III elements (B, Al, Ga, and In) in ZnO are investigated. The activation energy of vacancy-assisted mechanism consists of formation energy of Zn vacancy (VZn), binding energy between the dopants and VZn, as well as effective diffusion ener…
Hydrothermal synthesis of CuO-SnO2 and CuO-SnO2-Fe2O3 mixed oxides is done in an autoclave using the precursors and urea. The powders are characterized by XRD, XRF, SEM and XPS. Their electrochemical behavior is studied using cyclic voltammgorams in 0.1 M KCl solution. Introduction of Fe2O3 to CuO-SnO2 increased the c…
Problem statement: The aim of this research was to study the effect of Sr substitution on structure and thermal diffusivity of Bal-xSrxTiO3 ceramic at room temperature. Approach: Structural and thermal diffusivity of Ba1-xSrxTiO3 were studied by performing X-ray diffraction and photoflash measurements. The effects of…
This paper deals with a study on 120 MeV Ag9+ irradiated thin films of zinc oxide (ZnO), obtained by sol-gel – spin coating onto TCO glass plates. Films irradiated at fluence 5×1011, 3×1012, 5×1012 and 2×1013 ions cm-2, were optically characterized for band gap determination. XRD analysis revealed polytypism as both w…
Ganges river floodplain soil extends from Nepal through India to Bangladesh, which is a good niche for rice–rice and rice–wheat cropping systems in Asia. Application of potassium (K) fertilizer does not give any yield benefits to rice and wheat grown on most of the Ganges floodplain soils in Bangladesh. Understanding…
Wind power is one of the cleanest and safest of all the renewable commercial methods of generating electricity. However, wind energy is difficult to use due to its stochastic variability. Energy storage can overcome the main drawback, allowing energy production to match energy demand. In this paper, new hydrogen stora…
The authors investigated theoretically the lattice thermal fluxes in planar three-layered heterostructures with inner silicon or germanium layer using the face-centered cubic cell dynamic lattice model. It has been established that the acoustically mismatched claddings significantly influence on the phonon spectra and…
The methodology to adaptively change the configuration of an airfoil using a shape memory alloy (SMA) thin film actuator to improve aerodynamic performance is numerically demonstrated. To predict the thermomechanical behaviors of an SMA thin film, a 2-D incremental formulation of the SMA constitutive model is develope…
An IR spectrometric investigation of the dynamic glass transition of ethanol from the rotationally disordered crystal to the orientationally disordered crystal is carried out. The samples considered are thin films formed from the gas phase at a substrate temperature of T=16K. The measurements are performed using the e…
The described method for synthesis of proton-conducting ceramics BaZr 0.9 Y 0.1 O 3 − α at the temperature of 1850°C from mixture of barium carbonate and zirconium-yttrium hydroxides enabled to prepare high-density translucent specimens. According to powder diffraction data, the synthesized ceramics consists of single…
Electron transmission through insulating Al 2 O 3 nanocapillaries of different diameters (40 and 270 nm) and 15 μm length has been investigated for low-energy electrons (2–120 eV). The total intensity of transmitted current weakly depends on the incident electron energy and tilt angle defined with respect to the capil…
Abstract The electrical and thermal conductivity of nanocarbon filled polymers were studied by adding nanocarbon fillers (thermoexfoliated graphite (TEG) and dispersed TEG (nanoTEG)) to epoxy resin (ED) or polyethylene oxide (PEO). The content of filler in composite materials (CM) was (0.5–10) wt%. The temperature ran…
Direct and reverse martensitic transformations have been studied in Mn50Ni40In10 ribbons by means of magnetization and electrical resistivity measurements. The alloy is L21-type single-phase austenite, which transforms into a 14M monoclinic martensite. The martensitic transformation is accompanied by a large change in…
Abstract An environmentally friendly and economically efficient method has been developed to synthesize monodisperse CeO 2 ‐ZrO 2 solid solution nanocrystals. In this process, the formation of oleate‐stabilized Ce 0.5 Zr 0.5 O 2 nanocrystals was designed to proceed through hydrolytic sol–gel condensation of metal–olea…
Extensive testing has been performed at the Lawrence Livermore National Laboratory (LLNL, Livermore, California) to determine the corrosion characteristics of nickel-based alloys such as Alloy 22 (UNS N06022) and three titanium alloys. The studies focused on three major areas: immersion tests at the long-term corrosio…
The phase-change memory (PCM) technology represents one of the most attractive concepts for next generation data storage. PCM behavior is mainly limited by the structural relaxation (SR) and by the crystallization of an amorphous chalcogenide material: the ternary alloy Ge2Sb2Te5. SR is a local structural-rearrangemen…
Water-stable aggregates isolated from three subtropical and one tropical soil (Western Georgia and China) were studied for their organic carbon, cation exchange capacity (CEC), specific surface area, magnetic susceptibility, and total chemical elements. The soils were also studied for their particle-size distribution,…