Materials Literature
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This study provide several straightforward ways to fabricate nanoporous fibers with diameters in the rang from nanometers to several micrometers.The PAN nanoporous fibrous materials are unique in their ultrahigh specific surface and porous geometry and have the potential to meet emerging needs in advanced technical ap…
Comprendre la manière dont un matériau composé de grains s’écoule a des répercussions dans des situations pratiques très variées : transport de sable ou de graviers dans le génie civil, mélange de poudres dans les industries pharmaceutiques et cosmétiques, stockage de céréales dans le secteur agroalimentaire. Dans la…
In this study, the three dimensional ZnO (3D-ZnO) nanorods were synthesized by a simple chemical solution method, which were used as photoelectrodes, and CdS QDs were deposited on the surface of the 3D-ZnO nanorods to act a light absorber by using the successive ionic layer adsorption and reaction (SILAR) method. The…
The photoluminescence spectra of light-emitting structures based on silicon doped with erbium during the course of molecular-beam epitaxy at a temperature of 500°C are studied at 4.2 K on being annealed at 800–900°C. Three sets of lines belonging to the emitting centers of erbium in silicon with a low oxygen-impurity…
Zeolite / MC nylon 6 composites were prepared , followed by morphology and properties characterization of composites. The results demonstrated that a large number of pearlitic structures appeared at the interphase between the organic phases and the inorganic phases, indicating that caprolactam had happened anionic in-…
This paper discussed the effects of acid vapor and water vapor of different relative humility on corona partial discharge (PD) taken place in stator windings. Phase resolved partial discharge (PRPD) system was adopted to show the characteristics of PD. The experiment results showed that the relative humidity (RH) of v…
The frequency characteristics of AC discharge under non-uniform field gap were investigated in synthetic air. In the experiment, the frequency of AC high-voltage (ACHV) f was changed from 1 to 3,000 Hz. The gap distance of a needle to plane electrode was fixed at 1.0, 2.0 and 3.0 cm. As a result, in the case of positi…
Gallium nitride (GaN) has a bright future in high voltage device owing to its remarkable physical properties and the possibility of growing heterostructures on silicon substrates. GaN High Electron Mobility Transistors (HEMTs) are expected to make a strong impact in off line applications and LED drives. However, unlik…
The research data on the anodic oxidation of sodium salt of cyclohexyl ester of hypophosphorous acid on a Pt electrode are shown. The molecule of this salt has two electroactive centers: phosphoryl (PONa) and phosphine (P-H).
A modulation method, which consists of conventional space vector modulation (SVM) method based on a virtual AC/DC/AC conversion and carrier signal modulation for matrix converters, was proposed by authors, previously. The proposed SVM method can reduce distortion of output voltage waveforms. In this paper, the propose…
In this paper, Ce4+and Fe3+co-doped titanium dioxide nanocomposite was prepared by iron nitrate, cerium sulfate and titanium sulfate as raw materials and sodium dodecyl sulfate as surfactant under microwave irradiation. The x-ray diffraction (XRD) results show that as-prepared sample of direct adding doped cerium and…
Single layers of Zn0.8Cd0.2Se were prepared by thermal vacuum evaporation at room substrate temperature. Two groups of samples with the same composition were produced by applying consecutive deposition of ZnSe and CdSe sublayers with nominal thickness of 0.12 and 0.37 or 0.08 and 0.23 nm, respectively. Atomic Force Mi…
In this paper, the process parameters of graphene during fabrication and transfer are investigated. Cu is utilized as the substrate and chemical vapor deposition are used to obtain graphene. The results show that, the surface condition of the Cu substrate tends to be worse than as-received after a relatively higher te…
Nano films produced by the sol-gel technology were now widely used in the different science and technology areas for the effective properties modification of the glass substrates. The composite with such a nano film refractive index value changing after its interaction with the hydrochloric acid solution of the differ…
In this thesis, a study was conducted on the magnetic phase transformation behavior and magnetocaloric effect (MCE) under a low magnetic field ranging from 0-1.5 T for the casted and annealed Gd5Si2Ge2alloys. The result shows that high-heat treatment significantly influences the structural and magnetocaloric propertie…
The homogeneity of the strength of the magnetic field on the surface of a magnet placed in open and closed magnetic circuits is investigated using a program for modeling the remagnetization processes in highly anisotropic uniaxial ferromagnets. It is shown that the inhomogeneity of the magnetic field on the surface of…
Nanostructures with top subwavelength hybrid dielectric gratings and metallic triangle back reflector in Si thin film solar cells (TFSCs) are introduced in this paper. Compared with the studied light-trapping structures with normal surface and bottom gratings, our optimized structure has a better performance. We can a…
Spherical niobium powders were synthesized by (RF) argon plasma with irregular niobium powders in this paper. The objective of the present work was to investigate how the feeding rate influence the spheroidization efficiency. The phase composition, morphology and particle size distribution of the powders before and af…
Monomer casting polyamide 6 (MCPA6) was modified by zeolite whose microstructure owns nanoscale holes which has excellent interfacial compatibility with MCPA6. The zeolite / MCPA6 composites were prepared by anionic in-situ polymerization. FTIR indicated that the addition of zeolite did not cause adverse reaction in t…
Catalytic combustion technology can effectively reduce the temperature of the combustion reaction and significantly inhibit the formation of NOx. Perovskites catalyst materials have high stability, varied chemical composition, and low cost etc. A combination of catalytic combustion technology and perovskite catalyst m…