Materials Literature
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Temperature dependent photoluminescence (PL) properties of ZnO thin film prepared by sol-gel route were investigated. The excitonic-related emission peak at 3.336 eV dominates the spectra, and is attributed to the recombination of excitons bound to structural defects (DBX). Moreover, its thermal activation energy is 5…
The paper is talked about a high power active power filter. The main circuit topology adopts a three-phase three-line voltage source converter,which is constituted by three H-bridges. The delta connection H-bridge topology has a good ability to compensate unbalanced load and fulfills the requirements of energy compens…
CFRP (Carbon Fiber Reinforced Plastic) is functional material that is begin to be widely used in commercial aircraft, vehicle and etc. Investigation regarding the mechanical strength of CFRP is widely investigated. However, the electrical characteristics of this type of material are still not well known. Understanding…
Using the experimental method for water medium interval target how to affect the ability of the jet penetration degree is determined. In order to verify the target interval between target and target medium effect on the jet penetration, with a shaped charge respectively on the interval of air and water medium target p…
The polyfunctional organic compounds 2- hydroxymethyl -1,4- butanediol (trihydric alcohol) and toluene diisocyanate -2, 4- diisocyanate (TDI) were taken as the raw materials in this study. A polyurethane dendrimer was synthesized by utilizing the difference in the reaction activity of two isocyanate groups of TDI at d…
Morphology of mesoporous silica has been transformed from spherical to ellipsoidal form due to the structure directing role of alpha-cyclodextrin. The product exhibits a well ordered pore structure as deciphered from the SAXRD and TEM measurements. SEM studies indicate that the samples without alpha-cyclodextrin posse…
Abstract C27H25BCl2N6PRe, monoclinic, P21/c (no. 14), a = 10.404(2) Å, b = 20.006(4) Å, c = 13.391(3) Å, β = 92.74(3)°, V = 2784.2 Å3, Z = 4, Rgt(F) = 0.0205, wRref(F2) = 0.0449, T = 123 K.
The Paper has Established a Combustion Model of Lean-Burn CNG Engine by Three-Dimensional Simulation Software AVL FRIE. Based on Test Validation in the Model, the Combustion Processes of Seven CNG Samples were Simulated and Compared from the Intake Valve Closed to the Exhaust Valve Opening. the Effects on Different Co…
A new method for synthesizing magnetically responsive Fe3O4@UA@AA nanoparticles have been reported in this paper. The superparamagnetic Fe3O4@UA nanoparticles were prepared via carboxyl-functionalization of 10-undecenoic acid and Fe3O4@UA@AA made by a polymerization of 10-undecenoic acid on the surface of nanoparticle…
In this paper, numerical simulations using the finite element method (FEM), were performed to study the electric field (E-field) distributions along ice-covered 220 kV composite insulator with different sizes of grading rings at the high voltage (HV) end. Combining with energized ice accretion tests in artificial clim…
Due to its good wear resistance, Al-20Si is widely used as piston. But coarse primary silicon greatly undermines the mechanical properties of Al-Si alloy. The primary silicon could be refined in pulse magnetic field with suitable magnetic flux density and magnetic field frequency. In this work, the microstructure of A…
Under some experimental conditions, charges may transport like an isolated packet with a repetitive but transient character in polyethylene. We focus here on the so-called "slow charge packets" observed at a field of 100 kV/mm with an apparent mobility in the range 10-14-10-16m2V-1s-1. Many factors impact packets form…
Conductive PVAc/CNT/CB composite particles were prepared through emulsion polymerization. To get the good dispersity and chemical reactivity in the polymerization system, CNT was first modified with high concentrated nitric acid and sulfuric acid. And then in the polymerization process CNT and CB were evenly dispersed…
A simple way to develop single-walled carbon nanotube (SWNT) hybrids with ‘smart’ light-switchable properties is demonstrated by Y. Feng and co-workers. On page 5010, they decorate SWNT surfaces with pyrene-containing cyclodextrins via π–π stacking. After adding azobenzene-modified poly(ethylene oxide), the SWNT hybri…
Dielectric behavior of a typical liquid crystal polymer Vecstar was studied by measuring its dielectric permittivity, conductivity and other electrical properties. Dielectric spectra are analyzed combined with the thermal properties and thermally stimulated current spectra, and space charge distributions. Complex elec…
MSWI (municipal solid waste incineration) fly ash, generated in incineration process of municipal solid waste, contains lots of heavy metals, which will do harm do the environment if extracted. In this work, the ash is stabilized by cement to reduce leaching toxicity of heavy metals. Besides, mineralogical composition…
New, multi-pixel, air-filled ionization chamber for beam monitoring was constructed. For processing of 400 input signals, it utilizes a dedicated, homemade ASIC. Device parameters: sensitivity, resolution, dynamic range, etc. are discussed together with results from the particle beam tests.
In this article, the changes of the polyvinyl chloride (PVC) film properties and its law are analyzed during the ultraviolet and thermal aging. Using accelerated aging methods in laboratory,it was found that the tensile strength by ultraviolet aging fell down, on the contrary, it raised by thermal aging. This result i…
In this article, we use the molecular dynamic simulation to study the structure and transmission properties of polar fluid which is in the limited nature of nanochannel under the applied electric field. polar fluid is water. Simulation process is carried out under different electric field strength. The diffusion coeff…
Size-controllable synthesis of worm-like microporous monodispersed SiO2microspheres using dodecylamine (DDA) as direct agent in ethanol-water solvent system was firstly developed by varying the proportion of reactants. The products were characterized with scanning electron microscopy (SEM), high-resolution transmissio…