Materials Literature
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In this work, 2 μL water drops are placed on substrates that are created to have a circular hydrophilic region bounded by superhydrophobicity so that they exhibit high contact angles. When the substrate is translated by a linear stepper actuator, the random force components present in the actuator are shown to cause t…
Thermoelectric materials attract a lot of attention since they are the key for the thermoelectric power generation and thermoelectric cooling. In this study, main principles of improving thermoelectric figure of merit have been briefly introduced first. The key to improve thermoelectric conversion efficiency of thermo…
Experimental set up for the natural experiment and measurement model are presented to obtain the feld emission energy distribution spectrum out of silicon carbide in case of the macro-sample having a macroscopic shape of a tip. The prototype of feld emission 6H - SiC monolithic cathode is proposed for spectroscopy mea…
The effect of electron and phonon scattering on nanometer-sized pores on the thermoelectric properties of lead telluride has been studied theoretically. Estimations show that the thermoelectric efficiency can increase by 20–25% at room temperature and by 5–10% at 600 K at the optimal pore size of several nanometers an…
The kinetics of interaction of gas-phase oxygen with oxygen of perovskite-like manganites La1 - x A x MnO3 ± δ (A = Ca, Sr, Ba) at a temperature of 850°C and an oxygen pressure of 1 kPa was studied by isotope exchange of oxygen with analysis of the gas phase. The rates of the interphase exchange, dissociative adsorpti…
BACKGROUND: Stainless steel brackets are composed of various metal that may corrode in oral cavity. Corrosion is caused by the release of metal ions such as chromium, nickel, and iron. The release of metal ions can cause adverse effects such as toxicity, allergic, and mutagenicity. To evaluate the biocompatibility of…
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We experimentally demonstrate the enhancement of the spontaneous emission rate of GaAs quantum wells (QWs) embedded in rolled-up metamaterials. We investigate the spontaneous emission lifetime of semiconductor QW heterostructures which are directly integrated inside rolled-up microtubes (RMTs) with hyperbolic dispersi…
High-efficiency modulation of free-space EM waves owns wide application values in microwave devices, antennas, radomes, stealth technologies, etc. In this paper, we present a brief review on the work of our group on high-efficiency free-space wave modulation based on the excitation of spoof surface plasmon polaritons.…
The use of Ag impurity in Er-doped ZnO films deposited by AC magnetron sputtering with a low growth rate has increased the emission intensity at λ = 1535–1540 nm. An increase in the deposition rate and in the temperature of substrates, as well as the use of Li and N + impurities, led to a considerable increase in the…
Ferrocene-subphthalocyanine dyads characterized, where ferrocene is axially linked with subphthalocyanine at its axial position with the B–O bond through the para and metapositions, namely Fc–[Formula: see text]PhO–SubPc (dyad 1) and Fc–[Formula: see text]PhO–SubPc (dyad 2). The geometric and electronic structures of…
Increasing requirements in terms of performance in modern industry forced to use materials that can operate at higher loads.For metallurgical industry production increasingly require the casting of gray cast iron (GI) high marks.Improving the properties of cast iron and steel is achieved only through the effective dop…
Cross-linked polyethylene (XLPE) is a main kind of insulation materials, used in medium and high voltage power cable. High voltage XLPE cable production mainly adopts peroxide crosslinking method, and the performance of XLPE cable will be affected by decomposing by-products of crosslinking agent (DCP, dicumyl peroxide…
The corrosion inhibition of aluminium in 2 M H 2 SO 4 by millet starch was investigated using gravimetric technique at 35-65 O C and theoretical quantum chemical computations. The results indicate that millet starch functioned as a good inhibitor for acid induced corrosion of aluminium. It was found that increase in i…
An oil-paper insulation system which will withstand DC voltage under normal conditions is a key component of converter transformers as well as high voltage direct current (HVDC) bushings. When the system changes its state, operating overvoltage appears. This kind of overvoltage will consequently affect the application…
ABSTRACT Chemlok 205 primer is a common bonding agent used together with a top coat in rubber/metal–bonded composites. Recent studies indicated that a stand-alone Chemlok 205 primer failed when its metal substrate underwent corrosion. The failure was suspected to be caused by coating degradation, followed by cathodic…
The crystal structure of svabite, ideally Ca 5 (AsO 4 ) 3 F, was studied using a specimen from the Jakobsberg mine, Värmland, Sweden, by means of single-crystal X-ray diffraction data. The structure was refined to R 1 = 0.032 on the basis of 928 unique reflections with F o > 4σ( F o ) in the P 6 3 / m space group,…
The subject of the study are martensitic 22MnB5 steel and dual phase steel with the ferrite-martensitic structure, which are used in the automotive industry. The main purpose of the performed analyses is a study of strength differences in heat affected zones of the spot welding. For the needs of the strength decrease…
The Ising like model, taking into account short-, long-range interaction as well as surface effects is used to investigate size and shape effects on the thermal behaviour of 2D and 3D spin crossover (SCO) nanoparticles embedded in a matrix. We analyze the role of the parametert, representing the ratio between the numb…
In order to prepare phosphor-converted white LEDs with high color rendering index (CRI) and high luminous efficiency, the multicolor phosphor film by mixing more than two monochromatic phosphor powders in a silicone matrix is widely used. But usually its photoluminescence mechanism can't be explained by a simple super…