Materials Literature
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For ten years French Tritium laboratories have been using metal hydride storage beds with LaNi4Mn for process gas (HDT mixture) absorption, desorption and for both short and long term storage. This material has been chosen because of its low equilibrium pressure and of its ability to retain decay helium 3 in its latti…
Large blast furnace Electric furnace Fluid gas recovery Continuous casting Coal power injection Top
Ultravoilet (UV) photodetectors have been fabricated by rf magnetron sputtered ZnO films. The average grain size of ZnO films were 15-20 nm. Photo-response (Ion/Ioff) of as-grown ZnO film of thickness 100 nm was maximum (3.8 times 103) having relatively small response time ~90 ms for UV intensity of 140 muW/cm2(lambda…
Crystal structures and optical properties of the δ−O 2 phase and the ∊−O 8 phase have been investigated by using the ab initio pseudopotential plane-wave method. It is found that the phase transition is of the first order with a discontinuous volumetric change from the antiferromagnetic δ−O 2 phase to the nonmagnetic…
We report for the first time to our knowledge large-signal measurements performed at 600 MHz and in time domain on carbon nanotube field-effect transistors (CNFETs) using a large-signal network analyzer. To overcome the very high mismatch between the high CNFET impedance and the basic 50-Omega configuration of the set…
This paper investigates the third-order nonlinear optical properties of two azo-nickel chelate compounds by the optical Kerr gate method at 830nm wavelength with pulse duration of 120 fs. Both of the two compounds exhibited large third-order optical nonlinearity. The second-order hyperpolarizability, γ, of Compound 1…
The tensile deformations and fractures of super carbon nanotubes (SCNTs) with armchair-armchair topology are investigated by using the atomic-scale finite element method. SCNTs generated from carbon nanotubes (CNTs) with different characteristic aspect ratios are found to have different nonlinear behaviours under unia…
This paper reports that indium tin oxide (ITO) crystalline powders are prepared by coprecipitation method. Fabrication conditions mainly as sintering temperature and Sn doping content are correlated with the phase, microstructure, infrared emissivity ∊ and powder resistivity of indium tin oxides by means of x-ray diff…
We have been using the method of tube-arrest as a means of producing transient single cavitation bubble. In the present paper we seek to comprehend the mechanism of production and inquire into the structure of the ab initio pressure field in the arrested liquid column. The generated pressure wave is shown by combining…
Abstract The compound, Ti 3 Al 0.7 Si 0.3 C 2 , was synthesized by hot pressing a powder mixture of TiC X (x = 0.6), Al and Si. Its oxidation at 900 and 1000 °C in air for up to 50 h resulted in the formation of rutile‐TiO 2 , α‐Al 2 O 3 and amorphous SiO 2 . The oxide scales formed consisted of triple layers, viz , a…
A detailed mathematical model of a direct internal reforming solid oxide fuel cell (DIR-SOFC) incorporating with simulation of chemical and physical processes in the fuel cell is presented. The model is developed based on the reforming and electrochemical reaction mechanisms, mass and energy conservation, and heat tra…
The electrochemical corrosion behaviors of indium tin oxides (ITO) films were investigated by electrochemical methods in sodium hydroxide solutions. Cyclic voltammetries of ITO films at both anodic and cathodic polarization were carried out. Transmittance spectra, scanning electron microscopy (SEM) and X-ray diffracti…
Nitrogen-doped ZnO (ZnO:N) films are prepared by thermal oxidation of sputtered Zn 3 N 2 layers on Al 2 O 3 substrates. The correlation between the structural and optical properties of ZnO:N films and annealing temperatures is investigated. X-ray diffraction result demonstrates that the as-sputtered Zn 3 N 2 films are…
The well-defined structure of lipid A-diphosphate in aqueous solutions provides a way of observing the formation of calcium carbonate crystals. The crystals are either tetrahedral or rhombohedral calcite at a volume fraction of phi = 5.4 x 10 (-4) at pH 5.8 or the vaterite polymorph of CaCO(3) at a volume fraction of…
Processing routes to make oxide ceramic foams of porosity more than 70% with pore sizes in the range of 0.1–4 mm are reviewed. Microstructures and mainly characteristics of pores produced by incorporation of fugitives, infiltration through 3D-preforms, direct casting of foams are compared. Emphasis has been given to t…
Novel fluoride‐teminated hyperbranched poly(ether ether ketone) with 4‐phenoxyphenyl side group (HPEEK‐F) was prepared from 2‐(4‐phenoxyphenyl)‐1,4‐diphenol (A2) and 1,3,5‐tris[4‐(4‐flourobenzoyl) phenoxy]benzene (B3). An end‐capping approach was used to synthesize tertiary amino‐terminated fluorescent (HPEEK‐DMA) and…
It is a widely adopted approach to woven fabric design in industry, to define the construction parameters of the fabric to give a certain fabric unit weight. It is also equally important, from the engineering point of view, to design a fabric which fulfils the conditions of weavability and certain quality criteria. It…
The synthesis of catalytic filamentous carbon (CFC) on catalysts prepared by supporting Ni 2+ compounds onto the surface of various alumina modifications (macroporous α-Al 2 O 3 and mesoporous ϑ-Al 2 O 3 and δ-Al 2 O 3 ) using two procedures (impregnation and homogeneous precipitation) was studied. The texture charact…
Polyaniline (PANI)-based composite materials containing 5 to 65 wt % of multi-wall carbon nanotubes (MCNT) are prepared. Their electrochemical characteristics are studied, in particular, the effect of the MCNT content in the composite on the composite and PANI specific capacitance. The increase in the composite capaci…
We have synthesized heterostructured ZnO:S/ZnO 6-fold nanorotors through a one-step catalyst-free process during chemical vapor deposition. We performed a series of designed experiments to investigate the effect of growth temperatures, growth time, and the ratios between ZnO and FeS used as starting material on the gr…