Materials Literature
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The local structure distortion, the spin Hamiltonian (SH) parameters, and the electric fine structure of the ground state for Mn 2+ (3d 5 ) ion in ZnO crystals are systematically investigated, where spin–spin (SS), spin–other-orbit (SOO) and orbit–orbit (OO) magnetic interactions, besides the well-known spin-orbit (SO…
Based on generalized Steinmetz equation, this paper provides an expanded equation to achieve the wide-field iron-loss simulations of laminated magnetic steels. According to the analysis of magnetic steel 65CS1300 of China Steel Corporation, the new equation shows a lower predication error than 10%.
The temperature dependence of the optical properties of GdBaCo2O5.5 in the region of the metal-insulator transition was studied in the spectral range λ = 4.0–0.258 μm (E = 0.3–4.8 eV) by the spectroscopic ellipsometry method. The electronic structure of the crystal at T = 300 K was calculated by the linearized muffin-…
Eu+++ and Tb+++ ions have been incorporated into nanodimensional yttrium oxide host matrices via a sol-gel process using Y5O(OPr(i))13 as precursor (OPr(i) = isopropoxy). The as-synthesized white powders have been annealed at different temperatures. Photoluminescence (PL) spectroscopy and X-ray diffraction (XRD) have…
The through-thickness thermal conductivity in conventional adhesive joints (of approximately 0.3 W/m-K) fails to meet the thermal load transfer requirement in numerous applications to enable lean manufacturing and improve system reliability to thermal load. Carbon nanotubes are known to possess extremely high thermal…
The results of coordinated spectroscopic studies of the nature and properties of electronic excitations localized at regular and defect sites of the Be2SiO4 lattice are presented. The methods employed are electron-beam-excited pulsed absorption spectroscopy, pulsed cathodoluminescence, and low-temperature VUV spectros…
The specific features and possibilities of preparation of protective coatings and composite materials based on fluoromonomers using high-energy rays ( 60 Co γ-rays, fast electrons) were analyzed. The emphasis was placed on synthesis and application of tetrafluoroethylene telomers in acetone. The structure and properti…
ZnTe and ZnTe:Cr films were prepared onto glass substrates using the thermal evaporation method. Structural properties of the prepared samples were analyzed using X-ray diffractometry, and the presence of a ZnCrTe phase was identified along with poor crystallinity. Composition analysis was done using XPS and the Cr co…
A mathematical model of sulfonation of an HDPE film by sulfuric anhydride from gaseous is proposed. This model takes into account changes in the physicochemical characteristics of the sulfonated layer in the course of modification. It is assumed that this process is controlled by an increase in the solubility and diff…
The title complex cation, [ Sb ( pc )( OH ) 2 ] + , (pc = phthalocyaninate, C 32 H 16 N 8 2- ) has been prepared by oxidizing [ Sb ( pc )] I 3 with tert-butyl perbenzoate and isolated as hexafluorophosphate and triflate salts. These salts are relatively well-soluble in polar solvents (e.g. CH 2 Cl 2 , acetonitrile, ac…
The magnetodielectric and magnetoelastic properties of spinel Mn 3 O 4 with the orbital degree of freedom in the e g state of the Mn 3+ site were investigated. We found that strain (Δ L/L ) shows anomalies at the magnetic phase transition temperatures and is anisotropic against the crystallographic axis. We also found…
The magneto-optical Kerr effects in magnetic multilayered structures containing double-negative metamaterials are investigated by using 4×4 transfer-matrix method. The azimuth rotations and the figure of merit of the magneto-optical effects are calculated as a function of the thickness, permeability, and permittivity…
The refractive indices (n) and densities (ρ) of a glass and transparent nanocrystallized glasses with the composition of 25K2O-25Nb2O5–50GeO2 (i.e., KNbGeO5) are measured in the temperature range of 30–150 °C in order to clarify the temperature dependences of the electronic polarizability of oxide ions (αO2−) and opti…
Simultaneous spinning of commingled yarns and their investigation in terms of distribution homogeneity and thermal shrinkage is described in comparison with those intermingled by air jet texturing. Furthermore, the incorporation of various nanofillers into glass fibre (GF) sizings is demonstrated as an approach to ach…
This paper is concerned with the study of size effects in reactions of low-temperature CO oxidation on the catalysts Au/γ-Al 2 O 3 and Au/δ-Al 2 O 3 and complete oxidation of methane on the catalysts Pt/γ-Al 2 O 3 . For the synthesis of gold catalysts, four techniques have been applied: ionic adsorption, deposition-pr…
The reinforcing potential of micro and nano-size fibers from wheat straw in polyvinyl alcohol (PVA) was studied. The microfibers were obtained by alkali treatment and disintegration process of whea ...
Split dielectric resonator operating in a quasi TE011mode was used for the measurements of resonance frequency shifts andQ-factor changes due to the presence of closely packed metal film circles deposited on low loss dielectric substrates. Several film patterns were investigated having various diameters of circles and…
Covers advancements in spacecraft and tactical and strategic missile systems, including subsystem design and application, mission design and analysis, materials and structures, developments in space sciences, space processing and manufacturing, space operations, and applications of space technologies to other fields.
The influence of ZrC on the microstructure and mechanical properties of ZrB2-SiC ceramics was investigated. SEM observation showed that the presence of ZrC greatly inhibited the grain growth of ZrB2 and SiC phases. With the introduction of ZrC, the Vickers' hardness, fracture toughness, and bending strength of the sin…
To develop the anisotropic ceramic substrate with low sintering temperature for surface acoustic wave (SAW) applications, the low cost and feasible material with moderate piezoelectric properties, good dielectric properties, and higher Curie temperature were explored. The piezoelectric ceramics with compositions of Pb…