Materials Literature
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Reactions between lithium pivalate and cobalt coordination polymers [Co5(OH2)(OH)(Piv)9)L 1)4] n (I) and [Co2(OH2)(Piv)4(L 2)2] n (II), where Piv—is the pivalate anion, L 1 is pyrazine, and L 2 is pyrimidine, result in new heterometallic polymers {[Li2Co2(Piv)6(L 1)2]2 MeCN} n (III), {[Li2Co2(Piv)6(L 2)]0.5 MeCN} n (I…
We study the influence of the gravity field orientation on the microstructure of Al–Si forming alloy. Due to the difference between the diffusivity of aluminum and silicon, Kirkendall void formations are normally found at the back of rear-passivated solar cells instead of an eutectic layer. We show that the voids may…
The results of measurements of AlN polarization in the range of 4.3–300 K are presented. These results are used for calculating the pyroelectric coefficients as a function of temperature. The experiment was carried out both with an original sample grown from gas phase in nitrogen atmosphere at T ∼ 2400 K and with the…
Possibilities of admittance method application in soil state monitoring are under consideration in the proposed work. The preferences for this method over the traditional physicochemical methods are proved. The expedience of its use for the efficient providing of ecomonitoring informational system functioning during t…
We developed a simple method to synthesize nickel–nitrilotriacetic acid gold nanoparticles (Ni–NTA Au NPs) with a narrow size distribution for site-specific labeling in protein complexes. Au NPs were synthesized by the reduction of HAuCl4 using trisodium citrate and tannin acid. Then, the nanoparticle surfaces were mo…
The effects of cobalt substitution for magnesium on the microstructure and microwave dielectric properties of Ba(Mg1/3Nb2/3)O3 are investigated using X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), Raman spectra, and microwave dielectric properties measurement. The…
The paper investigates the measurement and propagation of voltage unbalance at a distribution transformer. The relations between unbalance factors in voltage and current with the direction of negative sequence fundamental frequency active power are investigated. The goal is to evaluate possible applications of the pri…
Electrospraying or electrohydrodynamic spraying is a technique of liquid atomisation by utilising electrical forces. In the electrospraying technique, the liquid at the outlet of a nozzle is subjected to an electrical shear stress by maintaining the nozzle at high electric potential. This produces a fine mist of extre…
In this work the results of long-term evaluation of lines of flax genetic collection created in VIR are generalized. A wide variability of fibre productivity and quality characters, and also stability of their manifestation in varying environment is revealed. The genotypes possessing contrast traits of productivity, q…
PURPOSE: Presently there is interest today in designing improved titanium surfaces capable of high bioactivity in order to promote strong anchorage of the bone surrounding implants while at the same time discouraging bioadhesion. Poly(ethylene glycol)-modified (PEG) alkane phosphate and OH-terminated alkane phosphates…
Nanocrystalline ZSM-5 (Si/Al = 100) is synthesized from an initial clear solution of TEOS-TPAOH-AIP-H2O system. The method comprises three stages: (i) concentration of an initial clear solution, (ii) low-temperature aging (25°C, 50°C, 75°C, or 100°C), and (iii) high-temperature hydrothermal treatment (180°C for 90 min…
The influence of five methods of production of Ni 50 Al 50 powder alloys on the processes occurring during reactive alloy formation of nickel monoaluminide during heating is considered. It is shown that, when powder mixtures obtained by agitation in ball mills and cladded composite powders with a low level of internal…
This paper presents the test methods of studying insulation characteristics of transformer oil at low temperatures. Karamay DB-45 transformer oils were selected as the initial specimens. Oil samples of different quality indexes were obtained after processing by the vacuum oil purifier. Each kind of oil sample was carr…
Abstract The effects of the length of glass fibers on the toughness of long glass fiber reinforced polyphenylene sulfide (PPS) composites (PPS-LFT), made by the pulltrusion process, were studied with regards to both the molding V notched specimen and the cutting V notched specimen. Toughness was excellent on the moldi…
Strip cleanliness in the industrial cold rolling mill must be controlled by optimizing the roll, strip, lubricant and process parameters. Obtained experimental evidence in this work shows which of these parameters have a significant influence on strip cleanliness. The experiments were carried out on a plate-out tester…
This paper proposes a solution for using supercapacitors to power mobile phones. Based on a DC/DC voltage converter and a supercapacitor stacking scheme, this solution is designed to maximize the usable energy of the supercapacitors as well as the converter's performance, which is confirmed in simulation. A specific c…
Patients that are afflicted with dysfunctional urinary bladders due to developmental defect, trauma or malignant transformation have limited treatment options that would allow for complete recapitulation of the urinary bladder. Hence, novel tissue engineering techniques that are successful in regenerating functional u…
This paper addresses the active control of a hybrid energy storage device, comprised of both battery and ultracapacitor cells embedded in a full electric shuttle. To distribute the power flows within the energy storage device, two criteria are under study, namely battery stress and global heat release minimization, an…
Taking advantage of the generalized Galerkin potential function and the Fourier transform, the research presented in this paper first derives the Green’s function for a multilayered heterogeneous thin film system. The area-integral expression for the stresses induced by a dislocation loop in the heterogeneous thin fil…
The photocatalytic degradation of Reactive Black 5 (RB 5), a di-azo dye was investigated over M/TiO2 (M = Ag, Au and Pt) photocatalysts irradiated with UV and visible light. TiO2 was prepared by sol-gel technique (Syn-TiO2). Photodeposition of metal salt precursors over Syn-TiO2 was carried out so as to obtain 1 wt% o…