Materials Literature
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The following paperwork presents results from examination of a resonant converter with voltage limitation over the commutating capacitor. The converter is used for charging of energy storage elements — supercapacitors or batteries. Computer simulations are carried out by the means of LTspice. The results from the comp…
Impedance spectroscopy is a powerful tool to study the frequency behavior of supercapacitors, but it comes with pricy hardware and postprocessing routines. Here we present a non-impedance method to extract the fractional-order model parameters (Rs, Cα, α) of a supercapacitor-assumed to be equivalent to a series associ…
The dissolution parameters of calcium carbonates play a key role in agriculture as they regulate the plant nutrients uptake and buffer the pH-value of the soil.The combination of µXRF, µXAS and µXRD mapping in the hard X-ray regime for the examination of both shortand long range order in natural limestones revealed th…
A graphene based ink for printing passive electrical components (conductive traces, resistors, capacitors, inductors) and circuitry on mechanically flexible polymer substrates is described in this paper. The ink is synthesized by using carboxymethyl cellulose (CMC), a hydrophilic cellulose derivative, to suspend the n…
This paper presents an optically transparent analog frontend of an RFID transponder which is suitable for integration on a solar cell. First, insertion losses of different configurations of microstrip lines (MS) and ground plane made of grid lines are discussed. With these knowledge a meshed analog frontend consisting…
Finite element method (FEM) is a powerful tool in analysis of electrical machines however, the computational cost is high depending on the geometry of analyzed machine. In synchronous reluctance machines (SyRM) with transversally laminated rotors, the anisotropy of magnetic circuit is provided by flux barriers which c…
Simultaneous solution of two kinetic models of electrodeposition of copper in sulfate solution is studied in this paper. Bulk concentration of species involved in the numerical solution was calculated using MATLAB software. COMSOL Multiphysics software was used for the numerical solution of copper electrodeposition. N…
Within density functional theory the experimentally observed stereoeffects of the ligand environment in low-spin bis-chelates of Ni(II), Pd(II), and Pt(II) with aromatic azomethines is modeled. It is shown that complexes with the MN 2 O 2 coordination core are characterized by the trans -configuration and in complexes…
The results of a crystallographic analysis of the structures of CsFe 2 S 3 , Tl 2 PbZrS 4 , and Tl 2 PbGeS 4 with a 1:1 cation–anion ratio are used to identify a joint F sublattice for Cs and S in the first compound and two separate F sublattices for cations and anions in the second compound (the PbS structural type).…
A novel trinuclear nickel(II) ONO pincer complex [Ni(pydc) 2 ] 2 [Ni(H 2 O) 5 ]·2H 2 O·2(C 6 H 15 N) (1) (H 2 pydc = 2,6-pyridinedicarboxylic acid) is synthesized by the reaction between Ni(OAc) 2 and H 2 pydc in acetonitrile in the presence of triethylamine. A detailed study through single crystal XRD reveals that th…
Industrial energy consumption represents a large part of the energy flow in the United States and it would probably be similar in many other countries. Coal or gas fired furnaces are a major component of the energy consumption to supply high temperatures. Refractory wall is indispensable along the furnace pathway desi…
A general methodology of research is presented, and the evolution of ideas about the material Polikon is discussed. The optimal monomer ratio, used for preparing the impregnating composition, to promote the formation of the material with high performance characteristics has been revealed. Empirical equations relating…
The results of DSC studies of NaBH4–KBF4 mixtures are presented. It is shown by chemical analysis, XRD analysis, IR spectroscopy, and 11B and 9F MAS NMR that the decomposition of the mixtures starts at ~563 K to yield polyhedral borohydride compounds (predominantly B12H 12 2- ) in the solid residue. This temperature i…
Frequency selective surface (FSS) as one kind of spatial filter is potential for realizing new generation stealth aircraft. The idea of “smart-skins” for radome based on active FSS (AFSS) is proposed in this paper. The PIN diodes are symmetrically loaded into two layer modified square loop slot FSSs with reasonable fe…
The corrosion inhibition of the synthesis poly o-anisidine on 304 SS has been studied by using a different electrochemical technique such as potential-time measurement, EIS and polarization methods in 0.5 M HCl, and 3.5% NaCl solutions. The poly o-anisidine layer has been obtained on SS electrochemically from 0.5M H 2…
A method of preparation of titanium materials with a porous surface layer by hydrostatic pressing and subsequent high-temperature sintering with use of a pore former as a temporary space holder was proposed. Comparative studies of the structure and properties of titanium materials with a porous surface layer fabricate…
Manganites Ca1–х Pr х MnO3–δ, where 0 ≤ х ≤ 0.15 were studied. The compounds have orthorhombic structure (space group Pnma) at ambient temperature, which consecutively transforms on heating in air into phases with tetragonal I4/mcm and cubic 000000 structure. Increase in praseodymium concentration leads to higher phas…
Flux-switching machine is a motor with permanent magnet located in stator, thus it has advantage with good heat dissipation. In this paper, a novel double winding structure and rotor suspension control strategy are proposed. The suspension winding adopts six-phase structure with every two coils symmetrical in space co…
The possibility of application of the solid-state track detectors, developed earlier for experimental nuclear physics, in laser plasmas investigations is considered. A review of the main physical and metrological properties of the solid-state track detectors is given. Special attention to the detector on the basis of…
Novel approaches for the determination of effective materials data such as Young's modulus and Coefficient of Thermal Expansion (CTE) are described for particularly defined building blocks of interconnect stacks of microelectronic products. These building blocks are simplified regions of interest needed for compact mo…