Materials Literature
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The kinetics of the ruthenium(III) catalysed oxidation of L-arginine by hexacyanoferrate(III) (HCF(III)) was studied spectrophotometrically in alkaline medium at 420 nm. It was found that the reaction is first order with respect to (catalyst) and (hexacyanoferrate(III)). The reaction showed fractional order dependence…
A adaptive control method of the pulse demagnetizer was presented, Can adjust the strength of the charge current automatically according to the changes of the magnetic content to ensure the constant of the magnetic field.The experimental results have shown that it has the advantages of low power consumption, strong an…
This paper describes review on performance and emission characteristics of twin spark ignition engine fuelled by gasoline and natural gas. Here, it will be shown that due to lower volumetric efficiency and lean effect in CNG Fuelled SI engine, the maximum torque generated is diminished compared to gasoline fuelled eng…
In this work, the p-type doping of the S A type stepped Ge(100) surface by a diborane ( B 2 H 6) gas flow has been simulated by the possible dissociation and adsorption models. The most probable dissociation model of B 2 H 6 and adsorption models of the fragments of B 2 H 6 on the stepped Ge(100) surface have been det…
A BAWR (bulk acoustic wave resonator) is an essential component of RF filters and duplexers in wireless communication devices. The BAWR consists of a piezoelectric layer sandwiched between bottom and top electrodes. Its resonance frequency shifts as an environment temperature changes, normally ranging −25∼−30 ppm/°C,…
We have successfully synthesized iron base composites reinforced with SiC particles by a dynamic hot-pressing sintering process heating directly by electrical current. The corresponding equipment was improved and the best processing parameters was achieved after a systematically investigation. It was found that the no…
Various composition of copper magnesium chromite spinels (Cu1-x MgxCr2O4 with x=0, 0.25, 0.5, 0.75, 1.0) were synthesized by co-precipitation method. The catalysts were characterized by various Physico-chemical methods XRD, nitrogen adsorption studies, FT-IR spectroscopy, Thermogravimetric analysis (TG), UV-DRS and Te…
A simple first principle model was developed based on extended Hückel-type orbital calculation, Marcus electron transport theory and two-dimensional-electron-gas model for the treatment of charge transport in conjugated polymers. Though simple and easy to compute, the effect of the applied electric-field is factored i…
Proliferation of controlled nuclear materials poses a threat to the security of the United States. High-energy neutrons can be used in the noninvasive detection of these materials. The neutrons are generated from fusion reactions in proton rich or deuterium rich solids that are bombarded by energetic ions. Deuteron io…
Two issues are addressed: (i) X-ray spectroscopic studies of RPD-SiO2and RPD GeO2, include band edge states and pre-existing defects, each in the OK edge spectrum, and (ii) interpretation of these X-ray absorption spectroscopy to identify band edge states and intrinsic defects. (iii) These provide a basis for interpre…
Penelitian ini bertujuan untuk mengetahui kadar logam Cu total dan Zn total dalam lumpur limbah industri pelapisan logam dan untuk mengetahui ada tidaknya perbedaan kadar Cu total dan Zn total dalam lumpur limbah industri pelapisan logam yang didestruksi dengan HNO 3 65%, HCl 37%, dan H 2SO4 95%- 97%. Subjek penelitia…
This paper discusses the effect of electron/hole blocking layer on the photovoltaic performance of the single junction solar cells. The study shows that with a pure electron blocking on the p-type doping Si and a pure hole blocking layer on n-type doing, it is possible to enhance the open circuit voltage and short cir…
Focused on the CCD composite dielectrics (Si3N4/SiO2), the method of the thermal-mechanical coupling simulation was studied by three different ANSYS models including the whole model, the 1/4 model and the 2-D model in this paper. The thermal stress and deformation were calculated, and the reasonableness of the simulat…
Assembled monolayer of silicalite-1 (AMS) microcrystals on Si wafer for carbon nanotube (CNT) growth has been prepared by the rubbing method. Iron oxide (α-Fe2O3, hematite) catalyst films were deposited onto silicate-1 monolayers from a Fe2O3 target by radio frequency (rf)-sputtering. This approach has the potential f…
This paper presents a method for improving hybrid electric vehicles (HEVs) performance and efficiency, using Bi2Te3and Si0.7Ge0.3thermoelectric (TE) materials. At first, the structure of the HEV and the two main types of it are explained. Then, TE generators and materials characteristics are discussed. After that, the…
The non-oxidative dehydrogenation of n-butane was studied over potassium-promoted supported vanadium alumina catalysts (at 823 K under atmosphere pressure) to explore the influence of the amount and the order of potassium aggregation on the catalytic activity and selectivity towards olefins. The non-oxidative dehydrog…
The use of conventional chalcogenide alloys in rewritable optical disks and the latest generation of electronic memories (phase change and nano-ionic memories) has provided clear commercial and technological advances for the field of data storage, by virtue of the many well-known attributes, in particular scaling, cyc…
The multi layered flat pressed wood plastic particle boards (WPPB) were prepared by using the plantation timber of poplar spp (poplus deltoides) with poly vinyl chloride (PVC). Different proportions of PVC were mixed with the wood particles for the manufacture of WPPB; the better physical, mechanical biological proper…
Microcontroller based thermogravimetric analyzer (MTGA) is an home built technique used to study the thermal decomposition of inorganic solids, chemical properties of intermediate and final products, synthetic conditions and synthesis of nanomaterials. The MTGA has additional features like controlled gas delivery syst…
(In,Ga)2Se3(IGS) thin films were deposited on Molybdenum (Mo) coated soda lime glass (Mo/SLG) substrates, using physical vapor deposition (PVD) technique, resembling only the first stage of the typical 3-stage growth process of CIGS thin film. The Mo thin films were sputtered on SLG substrates using DC planar magnetro…