Materials Literature
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By recent progress in electrically suppressed helix (ESH) ferroelectric liquid crystal (FLC) mode, a novel pixel design employing pulse width modulated (PWM) grayscale scheme, focusing on TFT flat panel display applications is proposed. Such design has a 3T1C structure, which is compact enough to preserve reasonable p…
Increasing power densities of power electronics with reduced volume requires increased efforts in cooling as little surface and material are available for thermal conduction. A systematic comparison of the thermal resistance of a wide selection of thermal interface materials (TIMs) ranging from solid Al2O3to elastomer…
The effect of organic modified montmorillonite (OMMT) on the ablative property, fire retardancy, thermal stability and charring capability of the ethylene propylene diene rubber (EPDM) composite was studied. Experimental data show that 33% decrease in the linear ablation rate of EPDM composite was obtained at a loadin…
The electronic structure of salicylideneaniline (SA) and some of its derivatives are investigated both experimentally and theoretically. The equilibrium geometric structures of the studied compounds are determined at the B3LYP/6-311++G** level of theory. A set of 12 substituted SA derivatives is considered in the pres…
The quality of ultrafast active cavitation imaging (UACI) using plane wave transmission is hindered by low transmission pressure, which is necessary to prevent bubble destruction. In this study, a UACI method that combined wavelet transform with pulse inversion (PI) was proposed to enhance the contrast between the cav…
Weft knitted structures are aff ected by various forms of dimensional distortion. Inclination and distortion of loops within knitted structures are commonly known as skewness and spirality, respectfuly. Causes of skewness and spirality have been thoroughly investigated, analyzed and classifi ed. They can basically be…
The surface chemistry of the commercial active carbon AG-5 has been modifi ed by oxidation with concentrated nitric acid. The structural changes caused by oxidative treatment were estimated on the basis of nitrogen adsorption-desorption isotherms and thermal analysis. Boehm titration method and infrared spectral analy…
Measurement of Partial Discharge (PD) in High Voltage (HV) power apparatus has become an emerging issue. It helps to provide prior warning before sudden failure of the apparatus. The measurement of PD in HV power apparatus and in any electrical systems helps to reduce the down time including saving of money. For large…
Abstract Copper sulfide-selenide (CuS 0.2 Se 0.8 ) thin films were deposited on FTO coated glass substrate (fluorine doped tin oxide) and stainless steel substrates using electrodeposition technique. Deposited thin films were characterized using different characterization techniques viz. X-ray diffraction (XRD), scann…
Ultraviolet (UV) and X-ray photoelectron spectroscopy and quantum chemistry methods (DFT) are used to study tris -β-diketonates of the rare-earth metals europium and lutetium. New information is obtained on the electronic structure of the complexes. The geometric and electronic structures of the compounds are calculat…
Interaction of polyphenylsiloxane with magnesium acetylacetonate in boiling toluene has been studied. The products isolated via extraction and fractional precipitation have been characterized with elemental analysis, IR spectroscopy, X-ray diffraction analysis, and thermal analysis. The reaction products are polymers…
The effects of N substitution on the magnetic properties of Mn 3 InC 1−x N x (0.0 ≤ x ≤ 0.7) are investigated systematically. Partial substitution of N for C leads to the monotonic reduction in both the Curie temperature T C and saturated magnetization M S . The final results obtained from thermo-magnetic curves demon…
The variation in the strengthening during uniform and nonuniform deformation is determined for structural steels in different states. In addition, the structure formation in tensile-fracture surfaces is studied. Theoretical analysis shows that the change in these parameters is related to the power of the stress concen…
Substitution rare-earth elements for cadmium in the monoclinic compounds Ln 2 MoO 6 (Ln – Gd, Ho) leads to the formation of fluorite-related cubic structure. Series Ln 2 x Cd x MoO 6 x/2 was investigated by XRD (with structure refinement), scanning electron microscopy, FTIR-spectroscopy and conductivity measurements.
The mechanism of the formation of in-situ ultra thin silicon nitride (SiNx) layer (< 2 nm) on amorphous silicon (a-Si) layer has been studied by Fourier transform infra-red spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The ultra-thin SiNx layers have been obtained through a hot-wire chemical vapor de…
Aganosma dichotoma (Roth) K. Schum. is an indigenous plant of Bangladesh. Traditional healers use this plant to treat many diseases. In order to systematically explore the medicinal values of this plant, the crude methanol extract of leaves of A. dichotoma were screened for analgesic and antidiarrheal activities in mi…
Ga2O3 possesses promising potential for power devices, supported by wide band gap of 4.9 eV (β-phase) and 5.3 eV (α-phase), as successfully demonstrated by Schottky barrier diodes (SBDs) and MOSFETs on β-Ga2O3substrates. However, in terms of future industrial applications, cost and availability of large-scale β-Ga2O3w…
A detailed investigation of electrical tuning of dynamic magnetization of the FeCo magnetic thin film grown onto a PMN-PT piezoelectric substrate was carried out based on the measurement of the zero-field permeability spectra under the application of a voltage across the thickness of the substrate. The resonance frequ…
In Ziegler-Natta olefin polymerization, the pore architecture of catalysts plays a crucial role in catalytic performances and polymer properties. While the type of preparation routes (such as chemical reaction and solution precipitation) greatly affects the catalyst pore architecture as a result of different solidific…
Polyamide-66(PA66)/CaCO3 micro- and nano-composites were prepared using a polymer solution method at filler loading of 0, 1, 2 and 3 weight percent. Nano-size of CaCO3 was synthesized by micro-emulsion technique. The material was characterized by XRD, SEM, FTIR and UV-VIS techniques. XRD results of composites suggeste…