Materials Literature
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The edge absorption of glassy melts of the As-Sb-S system are investigated in the temperature interval 77–300 K. It is shown that the temperature dependence of the fundamental absorption edge is described by an exponential function of the photon energy. The temperature and concentration dependences of the optical band…
In this paper, the new bamboo-based consolidated composite floors were fabricated with thin bamboo veneers which used as decoration layers, wear resistant layers, high density fiberboards and equilibrium layers through assembling and scuffing. The effect rules of the composite floor on properties were preliminarily st…
Eu 2 O 3 doped boron silicate glass appearing phase separation have been prepared and characterized. The heat treatment temperature was determined by DTA, the microstructure and optical properties of the glass were studied by SEM and fluorescence spectra. The adding of Eu 2 O 3 restrained the phase separation and crys…
Polystyrene (PS) microspheres coated with graphene oxide (GO) were prepared and the variation of their thermal properties according to the GO loading was examined. The GO content in the PS-GO nanocomposites was controlled by the GO dispersions at various concentrations. The GO was coated onto the surface of the PS mic…
carbonation rate of concrete structures are influenced by CO2 emissions and climate conditions. Carbonation depth prediction model was proposed and CO2 emission scenarios influence on concrete structures' carbonation damage was studied. As there are significant uncertainty and variability of CO2 emissions, deteriorati…
The results of recent experimental, theoretical and computer simulation studies of the thermodynamics and kinetics of grain boundaries and grain boundary junctions are presented and discussed.
Soy protein isolate/carboxymethyl chitosan/oleic acid (SPI/CMCH/O) blend films were prepared by solution casting. The effect of various oleic acid content (0, 2.5, 5.0, 10.0, 20.0 pph of SPI and CMCH) on water sorption isotherm of SPI/CMCH base film was investigated. The sorption isotherm of SPI/CMCH/O blend films was…
In this paper, it is investigated the characteristics of DSSC(Dye Sensitized Solar Cell) with cell area(0.25, 1, 2.25 cm2) and dye absorption time(12, 24, 36 h). Thus, we obtain the following results by using the EIS, UV-VIS, I-V measurement. When the cell area increases, the efficiency decreases to 21∼32 percent beca…
The present study aims at polysilicon material fill-in at re-entrant profile at flash memory product. The void was observed after polysilicon fill-in. In order to prevent the void formation, the multi-step process of deposition wet-etching deposition (DWD) method was evaluated. The DWD method is found to play benefici…
Abstract Der Einbau von empfindlichen Materialien wie Glas in die Gebäudehülle lässt sich besonders gut über adhäsive Verbindungen realisieren. Kommerziell wird dafür eine Vielzahl von Klebstoffen angeboten, doch ist neben der Auswahl eines geeigneten Klebstoffsystems auch die Oberflächenqualität der Fügeteile für die…
The study of the dynamic modeling of PEM fuel cell was based on the distributed-parameter model. The simulation will complete with Fluent, a computer software dealing with the PEM module of computer fluid dynamics. This paper first describes the distributed-parameter model, including the quality, momentum, energy, spe…
By applying chemical-mechanical polishing (CMP) technique to high precision processing of rotary surface workpieces of silicon nitride (Si3N4) ceramic, a CMP experimental device was established on a numerical control (NC) jig grinder. The polyurethane wheel and nonwoven cloth wheel was adoped. The CeO2abrasive was app…
The present work deals with the evolution of mechanical properties and structure of low-carbon Fe-1,12Mn-0,08V-0,07Ti-0,1C (wt.%) steel after severe plastic deformation (SPD) and high-temperature annealing. Steel in initial ferritic-pearlitic state was deformed by equal channel angular pressing (ECAP) at T=200°C and h…
W-Cu composites were used as starter materials of the thermionic cathode matrices for microwave tubes. However the decopperization affects their microstructure. An apparatus and an experimental procedure were developed to reduce the damages introduced during the decopperization. The matrix porosity (34.6%) was analyze…
This study investigated the effect of solvent composition, spinning rate and spinning time on the morphology of electrospun cellulose acetate (CA) fiber mats. To fabricate the fibers, 17 %w/v CA solutions prepared in the solvent consisting of acetone/N,N-dimethylacetamide (DMAc) at the ratios of 2:1, 1:1 and 1:2 (v/v)…
The mono polyethylene glycol maleate (MPEGM) was prepared by direct esterification of maleic anhydride (MAH) and polyethylene glycol (PEG). The yields of monoester (YM) could reached to 96% when the molar ratio of MAH and PEG was 1.2 using 2 wt% p-toluene sulphonic acid (PTSA) as catalyst at 95°C for 3 h. The amphoter…
The measurements of capillary forces on different diamond-like materials and carbon allotropic modifications taken using a scanning force microscope have been discussed. The amplitude-frequency characteristics of the nanorelief surfaces studied have been widely varied by plasma chemical treatments. The measurements of…
Based on the analysis of short-channel effects and device modeling of Nano-gate AlGaN/GaN high-electron mobility transistors (HEMTs), the key device characteristics of gate-length from 500 down to 50nm have been studied by numerical simulations. And the relationship between aspect ratio (the ratio of gate-length and t…
The ionic substitutions have been proposed as a tool to improve the biological performance of hydroxyapatite (HAp) based materials. In the present work, the systems of Ca(10-x)Mgx(PO4)6(OH)2 (MgHAp, x = 0, 1, 2, and 3) were successfully synthesized by solgel method. To obtain nanocrystalline of MgHAp, the prepared pre…
t was shown that ECAP of an Al6%Mg0.3%Sc through route C at a temperature of 325°C (0.6Tm) to a total strain of 8 leads to the formation of partially recrystallized structure; the average size and the volume fraction of new ultrafine grains (UFG) were 1.2μm and 0.7, respectively. Areas of UFG structure alternate with…