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Showing 1 to 14 of 14 for “"Effect of impurities"”.
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The Effect of Impurities on The Crystal Growth of Lead Tetraborate From Its Melt
… in DSpace on 2014-12-12T00:32:36Z (GMT). No. of bitstreams: 1 7511559.pdf: 5157513 bytes, checksum: f7a7625281e7fbbe47a6af007875b48d (MD5) Previous issue date: 1974
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Nickel powder precipitation by high-pressure hydrogen reduction
The effect of impurities on the precipitation behaviour of nickel powder produced by high-pressure hydrogen reduction was investigated in order to determine the factors responsible for the formation of powder with undesirable morphology. In nickel precipitation by hydrogen reduction, two product …
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Effects of solution complexation on crystallization processes
… produce high-purity solid products. The impact of solution chemistry on the kinetics and thermodynamics of crystallization processes is neither well understood nor properly characterized. Therefore, there exists a need for research to develop chemistry that can exploit the effect of impurities, …
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Effects of doping on the electronic properties of niobium triselenide
The results of magnetization, Electron Spin Resonance(ESR), and electrical resistivity measurements on both undoped and doped samples of the Charge Density Wave (CDW) material NbSe3 are reported. The magnetic studies show that both magnetic(V) and nonmagnetic(Ta) impurities may be introduced into …
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Role of Impurities in CO2 Stream During CO2 Injection Process in Heavy Oil Systems
In this study, the impact of impurities/mixtures in CO2 streams during the CO2 injection process as an enhanced oil recovery technique in heavy oil formations was examined. For this purpose, detailed theoretical and experimental studies were conducted to explore the possible effect of …
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Dielectric Properties of lce
A laboratory study of the dielectric behaviour of single crystals of ice from a temperate glacier and ice cores from the Greenland ice cap is described. A field investigation of the properties of snow on Axel Heiberg Island (Arctic Canada) is discussed. The permittivity of ice in the HF and VHF …
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A study on the relative runability of grid metal alloys
… in an attempt to compare the casting properties of various commercially used grid-metal alloys and to study other alloys that promise to be of value in the battery manufacturing industry. In previous publications (1) it has been shown that zinc has a very market effect in raising the surface …
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Investigation of Poultry Litter Bochar as a Potential Electrode for Direct Carbon Fuel Cells
… electrical energy from the direct conversion of the chemical energy of carbon. DCFC has a higher achievable efficiency of 80% compared to other fuel cells and the corresponding CO2 emission is very low compared to conventional coal-burning power plants. Moreover, a DCFC can use diversified …
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Spin-flip scattering of conduction electrons from impurities
"We report and analyze the results of a new type of experiment, the effect of impurities on the spin orientation lifetime of conduction electrons. We have made a theoretical and experimental study of the effect of non-magnetic elemental impurities on the conduction electron spin resonance (CESR) in …
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Fission gas transport and its interactions with irradiation-induced defects in lanthanum doped ceria
… to help understand the fundamental mechanisms of irradiation-induced defect formation and evolution in nuclear fuel, similar combined modeling and experimental efforts have been carried out. Ceria (CeO2) was selected as a surrogate material for Uranium Dioxide (UO2) due to its many similar …
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Phase formation sequence at metal-germanium interfaces in thin film systems.
… in germanium is due to the high mobility of its electrons and holes. It can therefore be used among other things as a high speed complementary transistor as well as in other devices. It is also used for making Ohmic contacts in GaAs devices. In strained layer (Ge,Si)/Si heterostructures, …
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Modelling and Simulation of Carbon Dioxide Transportation in Pipelines: Effects of Impurities
… seeks to encourage countries to take the issue of rising global temperatures seriously. With nearly all countries signing this agreement, many CCTS projects are expected. Pipelines are employed in the transportation of CO2. CO2 fluids contain impurities that affect the fluid properties and flow …
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The effect of vanadium oxidation states on the conversion of hydrogen sulphide to elemental sulphur
The formation of toxic hydrogen sulphide (H₂S) gas as a by-product is unavoidable during production of fuels and other chemicals from coal, crude oil, and natural gas. There are different processes available to recover H₂S of which the Stretford™ process is one of them. The concentration of …