Materials Literature
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This paper investigates the treatment of chromium (Cr) contaminated industrial sludge from a tanning process with ultrasound to enhance the sludge settling ability and dewatering ability. Ultrasound at various frequencies, intensities, and time was tested to optimize the operation. The results show that treatment with…
Tungsten trioxide (WO3) films have been coated on indium thin oxide (ITO) conductive glass substrate, using aqueous solution of peroxotungstic acid (PTA) by the sol-gel dip coating method. X-ray diffractometery (XRD) analysis confirmed monoclinic and triclinic structure for the film and powdered WO3 respectively. Four…
Nowadays in gas insulated systems (GIS), SF6is often used as insulating medium. Due to the fact that SF6is a greenhouse gas with a very high global warming potential (GWP), alternatives have been searched for over the last years. In particular, SF6/N2gas mixtures have been extensively investigated for the use in gas i…
Abstract The rare hydrous scandium phosphate, kolbeckite, [Sc(PO 4 ).2H 2 O], has been recognized for the first time from the Hagendorf-Pleystein pegmatite province. The mineral was formed by the alteration of quartz-rich relict cores of pegmatites containing rutile, ilmenite, columbite, pyrochlore, wolframite, monazi…
The phonon Boltzmann equation is solved numerically in order to study the phonon thermal conductivity of micro/nanostructured thin films with open holes in a host material. We focused on the size effect of embedded pores and film thickness on the decrease in thermal conductivity of the film. Simulations have revealed…
The optical absorption coefficient of amorphous 40TeO 2 -(60-x) V 2 O 5 -xMoO 3 thin films was determined in a spectral range 190-1100 nm at room temperature. The fundamental optical absorption edge was sharp. The optical gap generally increases as the proportion of MoO 3 in the mixed films increases. The width of the…
Abstract Summary: Nonwoven mats from hemp and polypropylene fibres in various proportions were produced and hot pressed to make composite material. The effect of hemp fibre content and anisotropy in nonwoven mats resulting from the carding technology were examined on the basis of the three‐point bending, tensile and i…
The nature and mechanisms of formation of the spontaneous polarization arising in thin ferroelectric films in the course of formation of a thin-film capacitor structure and relaxation of this polarization under the action of an electric field, temperature, and illumination are discussed.
Via-depletion electromigration was studied under a number of conditions in a 65-nm technology. Observed failure distributions were either single mode or bimodal, depending on the structural configuration. The distribution and the time to fail for the early-fail mode of the bimodal distributions varied with linewidth,…
Ultraviolet and visible upconversion emissions under infrared excitation have been obtained and compared in Nd3+-doped oxyfluoride glasses and glass ceramics prepared by different methods. The mechanisms involved in such processes have been analyzed. A spectroscopy study comparing absorption and upconversion excitatio…
When applying Wilkens' dislocation line broadening theory, the dependence on each individual slip system need to be considered, since the Fourier coefficients result from a convolution product over all active slip-systems. Corresponding diffraction profi
For ecological reasons, there is an increasing demand for recycling polyethylene terephthalate (PET) wastes in developed countries. Although one potential application might be its utilisation for the production of activated carbons, the behaviour of these wastes when subjected to different heat treatments and activati…
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Characteristic features of superplastic behavior of Mg-10 wt % Gd alloy with an ultrafine-grained structure produced by severe plastic deformation by high-pressure torsion have been considered. The ultrafine-grained structure has been studied by transmission electron microscopy and X-ray diffraction. The optimum tempe…
The calibration methods for the ARCADE II instrument are described and the accuracy estimated. The Steelcast coated aluminum cones which comprise the calibrator have a low reflection while maintaining 94% of the absorber volume within 5mK of the base temperature (modeled). The calibrator demonstrates an absorber with…
This paper describes the circularly polarized spectroscopic studies on absorption and emission of an achiral fluorescent dye embedded in cholesteric liquid crystals (CLCs). Optical excitation of the dye-doped CLC cell with a linearly polarized laser brought about the two laser emission peaks at longer and shorter refl…
In this paper, the oxygen sensitivity of gallium oxide thin films and single crystals at high temperatures is presented. To investigate the oxygen sensing mechanism at high temperature, we used sputtered β-Ga 2 O 3 thin films and β-Ga 2 O 3 single crystals with different electrode geometries. For β-Ga 2 O 3 single cry…
Poly(phenylene sulfide) (PPS) is an engineering thermoplastic polymer that presents high temperature resistance (glass transition temperature around 85 ºC and melting point at 285 ºC). These properties combined with its mechanical properties and its high chemical resistance allows its use in technological applications…
Violet-blue photoluminescence (β-band emission) of twofold-coordinated tin (O–Sn 0 –O, >Sn 0 ) atoms in silica (SiO 2 ) glasses, synthesized via a sol–gel route, was observed with a large band tail to longer wavelength. The presence of >Sn 0 centers more easily enabled us to produce Sn-associated E'-centers with X-ray…
We have fabricated the cross-point phase change memory with a selection diode made of poly-Si. The selection diode was fabricated using a low-thermal-budget process that achieved low contact resistivity, high on-current density of 8 MA/cm2 and low off-current density of 100 A/cm2. The improvement in the properties of…