Materials Literature
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Investigations of bulk dielectric properties of specimens extracted from in-service aged and aged UHVDC composite insulator sheds are reported in this paper. The program of the study included measurements of DC conductivity and complex permittivity at frequency range 10-4-103Hz at various temperatures in dry and wet (…
Tannery wastewater usually contains a high salinity due to the use of sodium chloride (NaCl) in curing and pickling. Although some no pickle tanning and salt-free pickling technologies were developed, few of them have been widely used due to relatively poor mechanical and bulk properties of the resultant leathers. The…
The development of borate based glasses for luminescence applications are reviewed. The present work covers various aspects including the search and synthesis of new materials, the formation of glasses, the structural and optical properties of absorption, excitation and luminescence on the prepared glasses, Informatio…
Novel near-infrared phosphorescent iridium(III) complexes based on benzo-annulated N-linked corrole analogue (termed as benzonorrole) were synthesized. The structures of the complexes revealed octahedral coordination geometries involving an organometallic iridium-carbon bond with two external axial ligands. Interestin…
The vacuum surface flashover voltage of dielectric material irradiated by electron-beam is very low, which is the key scientific issue for developing high-voltage and high-power spacecraft technology. This paper proposes a novel research way of considering the combined impact of incident kinetic electrons flowing to d…
In order to achieve selective targeting of affinity-ligand coated nanoparticles to the target tissue, it is essential to understand the key mechanisms that govern their capture by the target cell. Next-generation pharmacokinetic (PK) models that systematically account for proteomic and mechanical factors can accelerat…
In this paper, a detailed investigation and comparison of different analytical expressions for the high-frequency resistance of medium-frequency transformers is presented. The comparison is made by 2D FEM simulations and experimental tests with suitable transformers. The deviations between the FEM and the various anal…
Elastocaloric cooling has emerged as a promising alternative to vapor compression in recent years. Although the technology has the potential to be more efficient than current technologies, there are many technical challenges that must be overcome to realize devices with high performance and acceptable durability. We s…
Generally, the flexible polyurethane foams were synthesized by mainly petroleum-based polyols. In this present study, Caradol SA34-05 (petroleum-based polyol) was replaced by Emerox® 14001 (natural oil-based polyol) with 0-50 wt% replacement to prepare flexible polyurethane foam by one shot method. The NCO index (NCO…
Ni-bearing magnesium phyllosilicates (garnierites) are significant Ni ores in Ni-laterites worldwide. The present paper reports a detailed TEM investigation of garnierites from the Falcondo Ni-laterite deposit (Dominican Republic). Different types of garnierites have been recognized, usually consisting of mixtures bet…
There is no doubt that the electrical and thermal stress conditions in modern electrical networks are becoming much more challenging than in the past. The presence of voltage transients and power electronics, especially in grids involving renewables, is stressing insulation systems in a not-conventional and often not-…
Abstract Herewith, we review the available experimental data of thermoelectric transport properties of iron-based superconductors and parent compounds. We discuss possible physical mechanisms into play in determining the Seebeck effect, from whence one can extract information about Fermi surface reconstruction and Lif…
In this paper, an improved method to diagnose the critical conditions in the porcelain and glass insulators has been proposed through investigating leakage current (LC) and applied voltage signals. Hence, Fast Fourier Transform (FFT) analysis has been used to calculate the phase angle values of the applied voltage and…
The model describing the effect of anharmonicity on the spin-crossover properties of Fe(II) complex is proposed. It is shown that anharmonicity can be one of the important factors controlling the magnetic transitions of the low-spin high-spin type.
This article describes the influence of thermal properties of materials to properties of electrical insulating systems (EIS) in electrical rotating machines. Multi-component composite materials combine the advantage of the individual materials, and allow generate new materials with better properties than those of indi…
Several emerging spintronic devices have recently been proposed, performing computation by (a) generating spin currents based on input magnet states to switch an output magnet state using Spin-Transfer Torque (STT) [1,2], (b) using multiple nanopillars to drive a domain wall (DW) that switches an output nanopillar usi…
As a first attempt, a series of composite materials of general formula (Bi4Ti3O12)X – (CaCu3Ti4O12)1–X (BTOX – CCTO1–X) (X = 0–1.0) is synthesized by a sol‐gel combustion method. The phase changes, including their formation and evolution during the gradual substitution of BTO into CCTO are analyzed from the X‐ray diff…
Flexible electronic devices are necessary for applications involving unconventional interfaces, such as soft and curved biological systems, in which traditional silicon-based electronics confront a mechanical mismatch. Silk offers exquisite mechanical, optical, and electrical properties that are advantageous toward th…
G. Meng, N. Wu, and co-workers develop a hierarchically ordered array of silver nanorod bundles for surface-enhanced Raman scattering (SERS) detection. As described on page 4871, in each bundle, small gaps are formed between adjacent silver nanorods upon solution evaporation. At these sites, "hot spots" are generated…
This paper presents the results of the first experimental thermochemical investigation of two natural trioctahedral chlorites (clinochlores). The study was performed with the help of a high-temperature heat-flux Tian-Calvet microcalorimeter. The samples were characterized by X ray spectroscopy analysis, X ray powder d…