Materials Literature
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In order to improve the accuracy of electrochemical corrosion potential (ECP) calculations, information about the effects of the flow velocity, the type of oxidization species, the oxide film thickness, and the oxide film classification on the polarization curve is needed. Polarization curve measurements were studied…
Phase changes between amorphous and crystallized states were induced by laser irradiation with nanosecond pulses in GexTey films grown by metal organic chemical vapor deposition. The different phases were obtained by adjusting the pulse energy and could be distinguished by their different optical reflectivities. The c…
The exchange striction model is invoked to derive an expression for the entropy of ferromagnetic materials undergoing first- and second-order magnetic phase transitions. The magnetocaloric and barocaloric effects are calculated for the ferromagnet La(Fe0.88Si0.12)13 undergoing a first-order phase transition. The calcu…
Structure and dielectric characteristics of Ba[(Fe0.9Al0.1)0.5Ta0.5]O3 solid solution were investigated. The cubic crystal structure in space group Pm3¯m(221) was confirmed in the Al-substituted Ba(Fe0.5Ta0.5)O3 ceramics. The extended giant dielectric constant step and the significantly reduced room-temperature dielec…
Electrochemical deposition is a very efficient method for producing many types of modern materials. The method is not expensive and does not have a limit for sample size. In our work the preparation of Ni, Co and Fe nanowires is presented. The obtained nanowires had different diameter and length which were tunable by…
Abstract Nano‐sized cerium‐titanium pyrophosphates Ce 1− x Ti x P 2 O 7 (with x = 0, 0.2, 0.5, 0.7, 0.9, and 1.0) were obtained by grinding a mixture of Ce(SO 4 ) 2 ·4H 2 O, Ti(SO 4 ) 2 , and Na 4 P 2 O 7 ·10H 2 O in the presence of surfactant PEG‐400 at room temperature, washing the mixture with water to remove solub…
The bird-streamer caused failures have become one of the major causes of transmission line outages. It is more common and widespread than generally believed, and greatly threatens the reliability of transmission lines. The laboratory study of such failures mechanism is seldom reported especially for long gaps such as…
Ecofys and ECN conducted a study commissioned by the IEA Greenhouse Gas R&D Programme to identify the most suitable combinations of medium-scale CO 2 sources (1–100 MW th ) and capture technologies, with respect to potential and costs (see parallel paper by Hendriks et al.). An industrial coal-fired Circulating Fluidi…
Au/TiO2 and Au/TiO2-CeO2 catalysts were prepared by the sol-gel method and carbon monoxide, hydrogen chemisorption and TEM spectroscopy have been exploited to determine the size of gold particles. The gold nanoparticles (8.1 to 2.1 nm) were deposited by using the deposition-precipitation method. The XRD characterizati…
Reversible surface morphology can be used for significantly changing many surface properties such as roughness, friction, reflection, surface tension, etc. However, it is not easy to realize atop metals at micron scale around ambient temperature. In this paper, we demonstrate that TiNi and TiNi based (e.g., TiNiCu) sh…
The anomalously low efficiency of the work function (on the scale of a few tenths or hundredths of an electron-volt) and other unusual properties of the field emission from some types of nanocarbon materials are shown to be explained by assuming that graphene ladders are drawn out from their surface along the applied…
Thermal destruction of (NH4)42[Mo 72 VI Mo 60 V O372(H3CCOO)30(H2O)72]30H3CCOONH4 · 250H2O, polyoxometalate Mo132, was analyzed. Differential scanning calorimetry (DSC) and mass spectrometry were investigative tools. Thermal destruction occurs in air and in nitrogen in three main stages. First, water is eliminated. Th…
The condensation reaction of 2-amino-3-[(3-pyridylmethyl)amino]-2(Z)-butene-1,4-dinitrile with a series of diketones led to novel dinitriles, of which 2-(2,5-dimethyl-1H-pyrrol-1-yl)-3-[methyl(3-pyridylmethylene)amino]-2(Z)-butene-1,4-dinitrile, the product of the Paal-Knorr reaction, was successfully utilized in the…
Abstract A comparative study of the structural, thermal, mechanical and thermomechanical properties of ethylene‐octene copolymer 1 Ethylene‐octene copolymer is produced using Dow's INSITETM ™ constrained geometry catalyst and process technology. ENGAGE the trade name of this copolymer. ( mPE ) 2 This copolymer will be…
Divalent europium-doped metal nitride phosphors, Sr 2 Si 5 N 8 :Eu 2+ , were synthesized using three novel reducing agents, C 3 H 6 N 6 , C 2 H 4 N 4 , and Sr(CH 3 COO) 2 . The samples obtained showed higher emission intensity and lower residual oxygen/carbon content as compared with the sample prepared by the convent…
The real crystal structure of fukalite, Ca 4 Si 2 O 6 (OH) 2 (CO 3 ), was solved by means of the application of order-disorder (OD) theory and was refined through synchrotron radiation diffraction data from a single crystal. The examined sample came from the Gumeshevsk skarn copper porphyry deposit in the Central Ural…
The Raman, far infrared, and Mössbauer spectroscopy and photoluminescence of CuFeS 2 nanocrystallites were reported. The vibrational and magnetic properties of CuFeS 2 nanocrystallites were much sensitive to size than to shape. A new mode was observed in Raman and far infrared spectra of CuFeS 2 nanorods with an avera…
Os Neossolos Litólicos e Neossolos Regolíticos são solos pouco estudados no Brasil devido ao seu baixo potencial relativo de uso. Esse fato se reflete em dificuldades na execução da sua descrição morfológica no campo, principalmente no que se refere aos contatos entre solo, saprolito e rocha, e na sua classificação no…
A new device structure of phase-change memory (PCM) cell with a Probe like bottom electrode (PBE) was proposed and its electrical-thermal characteristics were investigated by three-dimensional finite element analysis. The programming region of the definition (GST) layer in the PBE cell is much smaller than that in a c…
By using the linearized two-fluid quantum hydrodynamic model for σ and π orbitals, the dispersion relations of electromagnetic waves in the single-walled carbon nanotubes are investigated. By injection of a relativistic electron beam, the excitation of electromagnetic waves in this system is studied. The graphs of ope…