Materials Literature
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Ultraviolet absorbing CeO2–TiO2 coatings were prepared by the sol–gel spin-coating process heat treated at 500 8C. The films obtained were brilliant yellow, adherent and had some pattern on the soda-lime glass substrate. The optical transmittance, thickness and hardness of the films as a function of the number of coat…
Motivated by recent experiments on the approach to jamming of a weakly forced granular medium using an immersed torsion oscillator ( Nature , 413 (2001) 407), we propose a simple model which relates the microscopic dynamics to macroscopic rearrangements and accounts for the following experimental facts: 1) the control…
This paper is the first part of a series investigating yarn twist propagation in rotor spinning and methods to produce modified rotor spun yarns. Here. an integrated mechan ical approach is presented for dynamic twist distribution in the yarn-forming process from fibers collected in the rotor groove to the twisted yar…
High temperature thermoelectric properties of Ca1-xDyxMnO2.98 (x=0, 0.05, 0.10, 0.15, 0.20) have been measured in the temperature range from 300 to 1273K. Ca1-xDyxMnO2.98 (x=0.10, 0.15, 0.20) exhibited the metal-insulator transition in the relation between electrical resistivity and temperature, and the transition tem…
In situ (as kept at 0.25 V vs. SHE in solution) and ex situ (in air) nanoscratching tests were performed to the iron single crystal (110) and (100) surfaces passivated at 0.25 V (SHE) in pH 8.4 borate solution to evaluate the correlated mechanical and electrochemical properties, i.e. , mechanoelectrochemical propertie…
In this study photoinduced cation generation, based on the photochemical properties of malachite green (MG), was used for the surface design and in vitro photochemical control of cell adhesion and proliferation. The MG-derivatized surface was prepared by coating a photoreactive polymer as a substrate onto a poly(ethyl…
The contribution of the filler network to the reinforcement of rubber is discussed for silica and organoclay-filled SBR. Mechanical and dynamic-mechanical experiments are performed to investigate the influence of the filler network and the data are fitted with a theoretical model. The percolation threshold is much low…
MgO and NiO–MgO with large mesopores were prepared by using the corresponding nitrates and carboxylic acids. Their pore structures were characterized by N2 adsorption, and reduced Ni–MgO samples were used in the liquid-phase hydrogenation of ketone. The mesopore size of MgO was controllable with the alkyl-chain length…
In this work. the results of the synthesis of high molar weight poly(L(+) lactic acid) (PLA) which is able to thermally crystallise have been described. Such PLA can be used in fibre formation. The synthesis of poly(L(+) lactic acid) was carried out in a solution of o-dichlorobenzene, p-xylene, o-chlorotoluene, and di…
Abstract The photochromism of two spiro compounds, a spiropyran and a spirooxazine, dissolved in alcoholic solutions of metal alkoxides M(OR) n (M = Zr, Al) has been studied. In the case of the aluminium alkoxide Al(O s Bu) 3 , special photochromic behaviour is observed characteristic of complexation between the colou…
The electron gun with field emission cathode is developed. The cathode was made of a bundle of carbon fibers. Specific properties of electron gun with bundles of carbon fibers are related to mechanical displacement of carbon fibers in the bundle. Specific types of emission current instability in connection with mechan…
Applicability of the diffusion bonding was examined in a superplastic magnesium alloy, AZ31, on two different grain sizes of 28 and 11 μm. In order to investigate the superplastic behavior, the tensile test was carried out at the strain rates from 10−4 to 10−2 s−1 at elevated temperatures. These materials showed a sup…
We characterized corrosion products formed on copper plates exposed to different outdoor conditions in urban, rural/coastal, and hot spring areas by means of field emission scanning electron microscopy (FE-SEM) and Auger electron spectroscopy (AES). FE-SEM observation revealed that the surface morphology was different…
Polymerization of aniline (ANI) was achieved in aqueous medium using sodium dichromate as oxidant in presence of hydrochloric acid. The obtained polyaniline was characterized by X-ray diffraction and electron microscopic studies. The thermogravimetric analysis (TGA) and differential thermal analysis (DTA) results were…
Ni-Ti shape memory alloy fiber embedded resin matrix composites were produced for evaluation of "smart denture", a newly developing denture with the function to close its own crack. Their bending strength and shape recovery after instant crack repair was estimated. The embedded fibers did not decrease the bending stre…
Effects of Co and Ni addition on fcc-fct transformation temperature and magnetic properties have been investigated for Fe-Pd ferromagnetic shape memory alloys. The addition of Co shifts the fcc-fct transformation temperature slightly higher while the Ni addition shifts it lower. The results suggest that the relative s…
Two new azido-bridged Fe(III) Schiff base complexes, [Fe(salen)N 3 ] and [Fe(MeO-salen)N 3 ]·2H 2 O, [salen = N , N '-bis-salicylaldehyde(ethylenediimine) and MeO-salen = N , N' -bis-3-methoxysalicylaldehyde(ethylenediimine)] have been synthesized, characterized and studied cryo-magnetically. A new isomeric form of th…
In this paper we present the synthesis and the characterization of cyclophosphazenes substituted with allyl groups, their transformation in epoxide-containing cyclophosphazenes and the final utilization of these compounds as chain extenders in combination with polyamides. The reaction at high temperature of Nylon-6 wi…
The selective staining of the polyisoprene block in a polystyrene–polyisoprene–polystyrene triblock copolymer enables nanoparticles of sputtered gold to be patterned into stripes, templated by the stained block copolymer lamellae.
In this study, the low voltage phosphor film for field emission display (FED) is prepared by electrophoresis. The influence of the deposition parameters, such as deposition time, deposition voltage, electrode distance, and stirring speed on the electrophoresis and luminescence of phosphor film are investigated. The op…