Materials Literature
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By the AgClO 4 interaction with 1-allyl-5-(2-Pyridyl)-1 H -tetrazolee (1 aPyt ) in a methanol solution, an [Ag 2 (1 aPyt ) 2 ](ClO 4 ) 2 π-complex is obtained, which is studied using single crystal X-ray diffraction.
The use of modified forms of zeolite-containing rocks (ZCRs) that comprise a mixture of zeolites as catalysts for the dehydration of methanol to dimethyl ether has been studied. Results of examination of the effect of chemical modification on the activity and stability of the catalysts have been described. It has been…
In this paper, a compact zeroth-order resonant composite right/left-handed (CRLH) antenna based on modified Jerusalem mushroom structure is proposed. The modified Jerusalem cross-shaped mushroom is engineered to attain a low capacitance but a high inductance, which in turn reduce the resonant frequency and hence to fu…
Abstract This article presents the results of the chemical structure research of organic sorbent surface such as walnut shells, plums stones and sunflower hulls with using such methods as infrared spectrometry (FTIR) and elemental analysis. Based on the IR spectra identification of functional groups present on the sur…
Silicon powder and phenolic resin were used as raw materials to produce porous silicon carbide (SiC) ceramics, with SiC whiskers (SiCw) as reinforcement additionally. Starting with the preparation of core-shell structure precursor powder through coat-mix method, and then by carrying out molding, carbonization and sint…
The growth technology of single crystals of Cu1 − x Zn x InS2 alloys (x = 0–12) of n-type conductivity is developed. The formation mechanism of the alloy is investigated by X-ray structural analysis. It is shown that the single crystals have chalcopyrite structure, and the unit-cell parameters depend on the alloy comp…
Impedance spectroscopy data for a several materials with high ionic conductivity at the intermediate temperature range (296-473 K) were obtained and analyzed. Investigated systems including pure CsSb2F7, KSb2F7, related solid solutions Cs(1-x)KxSb2F7 (0.1≤x≤0.65) and some ionic materials with fluorite structure PbF2-B…
Mssbauer spectroscopy was applied to investigate the structural and magnetic parameters of cubic phase in the MnSb system. The validity of the model of triangular magnetic structure in Mn3Sb has been conrmed.
Physico-chemical properties of PbO 2 -anodes modified by bismuth have been investigated in this work. The incorporation of Bi 3+ dopant in the deposition solution allows one to obtain modified lead dioxide materials, bismuth content in which growths as increases its concentration in the solution. It was established th…
Nanotip arrays with high aspect ratio, which have attracted much attention due to their potential applications, have been fabricated by many methods. Dry etching combined with self-assembly masks is widely used because of the convenience of dry etching and high throughput of self-assembly. In this paper, we report a m…
In the traditional PECVD method for growing carbon nanotubes (CNTs), the electric field is an important parameter. Its role is to orient CNT growth and dissociate the H-C bond from hydrocarbon gases. Therefore, high energy ions, molecules, and radicals as plasma elements can affect the verticality of CNTs. In this pap…
The template synthesis of mesoporous silica nanoparticles with predetermined size and porous structure is carried out. Water-soluble photosensitizer Photosens is used to study the possibility of applying such particles as containers for photosensitizers of a phthalocyanine series. In vivo experiments have shown that t…
Resistive random access memory (ReRAM) is an attractive candidate for application in next-generation nonvolatile (NV) memory devices for both aerospace and conventional commercial applications. ReRAM has several intrinsic advantages over other NV memory technologies due its simple metal-insulator-metal structure inclu…
X-ray diraction and 57 Fe Mssbauer spectroscopy were applied as complementary methods in order to investigate the structure and hyperne interactions of (BiFeO3)1-x(BaTiO3)x solid solutions prepared by mechanical activation and subsequent heat treatment.
Abstract Mechanical alloying of high-purity aluminum and 10 wt.% NiO powders combined with powder vacuum compression and following hot extrusion method was used to produce an Al-NiO composite. Mechanical properties of as-extruded materials as well as the samples annealed at 823 K /6 h, were tested by compression at 29…
An analysis of the magnetic properties of the binary Ni 3 Al intermetallic compound (unalloyed and alloyed with iron and cobalt) after high-pressure torsion has been carried out. For all of the alloys studied, the deformation using ten revolutions of the anvils at 10 GPa results in the formation of a nanocrystalline c…
The corrosion resistance (stress corrosion cracking, exfoliation, intergranular corrosion) of a wide group of aluminum-lithium alloys has been studied under atmospheric conditions with various corrosion environments. Corrosion behavior of experimental and commercial batches of aluminum-lithium alloys has been establis…
An enhanced parametric macromodelling scheme is presented for linear high‐frequency systems based on the use of multiple frequency scaling coefficients and a sequential sampling algorithm to fully automate the entire modelling process. The proposed method is applied on a ring resonator bandpass filter example and comp…
Abstract Two new silver(I) 3D coordination polymers, namely [Ag3(2‐stp)(dpa)]n (1) and {[Ag2(2‐stp)(H2O)]⋅Hdpa}n (2) (2‐NaH2stp=sodium 2,5‐dicarboxysulfonate, dpa=di(pyridine‐2‐yl)amine) were synthesized. The complexes were characterized by elemental analysis, FT‐IR spectra, thermogravimetric analyses (TGA), and singl…
At present, the superheater and reheater pipes in supercritical and ultra-supercritical boilers have encountered with widespread problems of high temperature steam oxidation, seriously affecting the operation safety and economy of the power generation unit. After several tests and contrastive analysis on the main chem…