Materials Literature
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Good thermoelectric devices with a high value of figure of merit are required to convert back waste heat into useful energy. One way to achieve this goal is to engineer the surface of nanostructures by introducing roughness, thus leading to a significant reduction of their thermal conductivity. We formulate here new t…
It is well known that the magnetic properties of a stator core in a rotating machine such as an induction motor are influenced by residual stress and external force. Residual stress is generated during manufacturing processes such as punch, laminate, and shrink fit processes. Magnetic properties such as iron loss of t…
Particulate magnetoelectric composites (x)Mn0.4Zn0.6Fe2O4 – (1-x)PbZr0.53Ti0.47O3 with x = 0, 0.1, 0.2, 0.3, 0.4, and 0.8 have been prepared using the ceramic technology. Prepared composites with x = 0.2 was revealed to be characterized by the crossover from the ordinary ferroelectric state to the relaxor ferroelectri…
Quick development and usage of nanotechnology have resulted to massive use of various nanoparticles, such as iron oxide nanoparticles (IONPs) and multi-wall carbon nanotubes (MWCNTs). Thus, this study investigated the role of IONPs and MWCNTs in enhancing bioenergy recovery. Results show that IONPs at a concentration…
XAFS studies of nickel-doped solid solution Ba1–x Sr x TiO3 show that the Ni charge state changes from 4 in SrTiO3 to ~2.5 in BaTiO3 as x is varied. First-principles electronic structure calculations show that nickel creates an impurity band in the forbidden gap of BaTiO3 and SrTiO3. Calculations of the formation ener…
The efficiency of alcoholic extract of Tetrameles Nudiflora (TN) leaves as an environmentally friendly inhibitor for mild steel in 1N HCl solution has been investigated by weight loss method, potentiodynamic polarization measurements and electrochemical impedance spectroscopy techniques. Inhibition efficiency was foun…
An upgraded high-vacuum installation and procedure for studying diffusion of hydrogen in a BT1-0 titanium alloy membrane during irradiation of a sample by an electron beam with an energy of 10-120 keV in the scanning and stationary modes and with simultaneous electrolytic saturation are described. For this purpose, de…
Joint electrochemical oxidation of copper and aluminum using alternating current (AC) was performed. The electrolysis products were dried on air (method carbonate) and at the residual pressure of 3-5 kPa (oxide method). Cu-Al layered double hydroxide (Cu-Al/LDH) are formed at air carbonization. Oxide method saves copp…
A series of nanoindentation tests on both single and polycrystalline specimens of a monazite rare-earth orthophosphate, GdPO4, revealed frequent observation of anomalous unloading behavior with a large degree of recovery, where previously this behavior had only been observed in xenotime-structure rare-earth orthophosp…
Multiscale study of single and multilayer graphene irradiation is presented in this paper. Ab-initio density-functional theory (DFT) was used to study point defects, and a large scale parallel molecular-dynamics (MD) simulations were used for studying formation of gas cluster ion impacts. Moreover, Raman spectra of pu…
The sol-gel synthesis of filled aluminosilicates (FAS) has been developed. Such FAS consist of dendrimer morphology macromolecules capable to accommodate as a filler up to 70 % wt of high-refractory nitrides and oxides of high-melting compounds. The study of the obtained ceramic coatings on the developed metal surface…
Core Ideas The expansion properties of montmorillonites treated with PHA steeply decreased. A mixture of montmorillonites and PHA solution is not a colloidal system. Al 13 groups are the main intercalator and factor influencing swelling behavior. The treatment may be applied in expansive soil research. Studies concern…
Abstract In this study we synthesize a novel mesoporous titanium oxide (TiO 2 ) through calcination of a bioinspired supramolecular assembly of polymeric micelles, based on the thymine‐functionalized homopolymer, poly(4‐vinylbenzyl triazolylmethyl‐methylthymine), complexed with Ti(OH) 2 2+ ions. We characterize thin f…
Two types of conjugated oligomers based on 4,4'-triphenylamine vinylene have been synthesized and characterized by the methods of IR, UV–visible, and 1 H NMR spectroscopy. The corresponding spectra have also been simulated theoretically at the density functional theory level with application of the B3LYP and BMK hybri…
Organic electrochemical transistors (OECTs) with two topologies and three ionic liquid electrolytes were analyzed to get information about their influence on the selected transistor’s characteristics. The channel of the OECT device was based on conductive polymer poly(3,4-ethylenedioxy-thiophene) poly(styrene sulfonat…
A novel, fully automated surface-consistent solution for refracted waves, is developed to solve for a combination of long and short wavelength statics at the early stages of seismic data processing. The method is very efficient in terms of computing resources and dramatically reduces the turnaround time for deriving n…
Electrospinning recognized as a simple and inexpensive process for producing continuous polymeric nanofibers with diameters ranging from several micrometers down to tens of nanometers. In this study, an electrospun nanofibrous scaffolds based on lactic-co-glycolic acid (PLGA) and nanohydroxyapatite (nano-HA) was devel…
Ultra-high-frequency (UHF) technique for detecting partial discharge (PD) phenomenon is a useful method to avoid insulation accidents in gas insulated switchgear (GIS). However, the circumferential angle position of UHF Sensor in GIS has a great effect on the PD detection, which has not been investigated sufficiently.…
Sphere-plane gaps constitute one of the most, theoretically and practically, interesting electrode configurations in High Voltage testing. Up to now, most of the studies available in the literature are, almost entirely, based on laboratory experiments and the specification of the Critical Flashover Voltage (CFO). The…
Presently, the wide usage of power electronics in electrical power systems brings a new type of voltage stresses of insulation systems. Power electronic systems, as high voltage dc systems, flexible ac transmission systems, voltage source convertors, static compensators etc., are usually using the pulse width modulati…