Materials Literature
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摘要： 通过2-(2-氯乙氧基)乙醇和2-溴乙醇分别与1-甲基咪唑反应，合成乙醇基甲基咪唑溴（EMIMBr）和乙氧基乙醇基甲基咪唑氯（EEMIMCl）2种羟基咪唑离子液体，用1H NMR和FT-IR表征结构，TG和DSC进行热性能测试，并研究了其电化学性能。 结果表明，羟基类咪唑离子液体具有高的热稳定性，这种含醚氧键和羟基的短链离子液体有利于电导率的提高，导电机理符合Vogel-Tmman-Fulcher（VTF）方程。 乙醇基甲基咪唑溴和乙氧基乙醇基甲基咪唑氯的室温电导率分别为1.2×10-4和1.7×10-4 S/cm。 对于碳酸丙二醇酯、乙氧基乙醇基甲基咪唑氯和钾盐体系，室温电导率最高可达3.82×10-3 S/cm。 乙氧…
In this paper, the discrete dipole approximation (DDA) is applied to calculate the scattering property of optical materials in nanoscale. First of all, the scattering electric field of golden nanosphere is calculated to validate the DDA. Then the DDA is used to calculate the reflectance spectrum of a photonic crystal,…
En diversas regiones de la Argentina, en particular en la region Pampeana, se han incrementado los sistemas de engorde a corral (feedlots). La ausencia de tratamientos adecuados de los efluentes producidos por estos establecimientos crea severos problemas para la sociedad. El uso de plantas nativas para la remediacion…
In this study, silver nanoparticles were synthesized by chemical reduction method at different concentrations of Ag colloid in the range of 500-16000 ppm. Nanoparticles were deposited by spin coating method on pre-etched glass and Si substrates. Structural, optical and electrical properties of the samples were studied…
The effects of cobalt dopant on the properties of PZT ceramics with the formula of Pb(Zr0.52Ti0.48)1-xCoxO3 (where x = 0, 0. 002, 0. 005, 0. 01, 0. 015. 0. 02, 0. 025 and 0. 03) were studied. The cobalt doped PZT ceramics were produced using a conventional mixed oxides route. Phase structure and microstructure of thes…
Microwave dielectrics have been researched up to present, and many compounds with excellent properties are presented, which are listed in a book ”Dielectric Material for Wireless Communication” written by Sebastian (2008). These materials are expected for usage of millimetrewave applications and new applications as pa…
The effect of addition of two indigenously developed superabsorbent hydrogels (P-gel and K-gel), to sandy loam soil on sorption and leaching behavior of metribuzin was studied under laboratory conditions. Addition of both hydrogels to soil improved metribuzin sorption significantly as indicated by higher Freundlich ad…
Using Bi(NO3)3•5H2O, Na2WO4•2H2O and Ti• (OC4H9)4 as the main raw materials, different alcohol solvent as medium, hexamethylene tetramine as sink set agent, tungsten bismuth and titanium dioxide composite powder were prepared by hydrothermal synthesis. It was characterized by XRD and DRS. The methyl orange imitated se…
Continuous wave (CW) and passively Q-switched (PQS) laser properties at 1062 nm of the Nd:LuxGd3-xGa5O12 (Nd:LGGG) disordered crystal have been demonstrated. The doping concentrations of Nd3+ and Lu3+ in the as obtained crystal were measured to be 0.96 and 0.66 at.%, respectively. In the CW regime, the output power of…
Polycrystalline Cr2AlC was fabricated by a solid reaction synthesis of a mixture of Cr, Al and graphite powders in a flowing or the atmosphere in the temperature range of 700 to 1450 °C. The products for identification and analysis were characterized by X-ray diffraction (XRD). The effects of the composition of the in…
Bi2.9Pr0.9Ti2.97V0.03O12 (BPTV) ceramics were prepared by solid state reaction. These samples had polycrystalline Bi-layered perovskite structure without preferred orientation, and consisted of well developed plate-like grains with random orientation. BPTV caused a large shift of the Curie temperature ( TC ) of Bi4Ti3…
Nanowires of sodium titanate, TiO2 and Eu3+/TiO2 were synthesized by hydrothermal method, and their microstructure, optical properties and valence states of exterior elements were characterized by X-ray powder diffraction (XRD), scanning electron microscopy(SEM), X-ray photoelectron spectroscopy (XPS) and UV-Vis diffu…
Nb1-xTixSe2(x=0～1) micro/nano-particles have been successfully prepared via solid-state thermal (750°C) reaction between microsized Nb, Ti with Se powders under seal environment in a seal quartz tube and characterization by X-ray diffractometer and scanning electron microscopy. It was found that the morphologies of th…
(0.996-x) K0.5Na0.5NbO3- 0.004 BiFeO3- x LiSbO3 (x =0.00, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07) lead-free piezoelectric ceramics were prepared by the conventional mixed oxide method. The compositional dependence of the phase structure and the electrical properties of the ceramics were studied. A morphotropic phase bound…
Fe3+-doped TiO2/diatomite composite photocatalyst were prepared by sol-gel method with titanium isopropoxide used as precursor material. The samples were characterized by SEM, XRD, XPS, BET surface area analysis and UV-Vis techniques. The results showed that the optimum concentration of Fe3+ in the composite catalyst…
Two-dimensional event-driven simulations are employed to gain insight into the granular energy and segregation in granular gases with a Gaussian particle size distribution when exposed to a differential heating mechanism. It is found that the bulk value of the temperature ratio depends on the choice of differential bo…
The first-principles calculations are performed to investigate the adsorption of O 2 molecules on an Sn(111) 2 × 2 surface. The chemisorbed adsorption precursor states for O 2 are identified to be along the parallel and vertical channels, and the surface reconstructions of Sn(111) induced by oxygen adsorption are stud…
In this paper, the static pull-in instability of beam-type micro-electromechanical systems (MEMS) is theoretically investigated. Two engineering cases including cantilever and double cantilever micro-beam are considered. Considering the mid-plane stretching as the source of the nonlinearity in the beam behavior, a non…
High-performance detectors with high spatial and time resolutions are required in applications such as imaging of fast processes, time-resolved coherent scattering, and time-resolved X-ray spectroscopy. Recently a new type of X-ray detector was proposed, based on microchannel plates (MCP) coated with resistive and emi…
Uyghur is one of the oldest ethic groups which enjoy a long history. Uyghur people are noted for their diligence, enthusiasm, expert in singing and dancing. In the long historical development, Uyghur people have created profound and extensive art and culture. Gorgeous clothing is a necessary part of Uyghur dress cultu…