The current status and recent advancements in the use of the FFC Cambridge process for the production of low cost titanium and titanium powders is presented. This will include an overview of the process, current and future process equipment and recent results in terms of chemistry, structure and properties of powder and consolidated product. The future direction and activities for the FFC Cambridge process will also be briefly discussed.
Studies pertaining to kinetic aspects of the direct electrochemical reduction process of titanium preparation from TiO 2 have not been substantial for determining the conversion time precisely. The solid state reduction process does not permit measuring either the rate of formation of product or the rate of depletion of the feed stock. In this work an attempt has been made to study the applicability of variation of CO 2 (the product gas) in the vent gases of the electrolytic cell to approximate the bulk process kinetics of the process. From the electrolysis current trend, it might be possible to estimate CO 2 pro le during the electrolysis time so as to utilize the same for inferring optimal time of the electrochemical reduction process.
Nearly mono-disperse high quality quantum dots (QDs) of zinc selenide have been synthesized by organometallic route that includes use of well known surfactants such as a carboxylic acid and trioctylphosphine (TOP). Single-step synthesis was performed at a temperature that is lower than many reported methods for such quantum dots of semiconductors. UV-Visible spectra of series of experiments showed steep absorption band at about 418 nm (Eg 5 3.0 eV). Photoluminescence measurement revealed band-edge emission at 431 nm from the ZnSe QDs. The particle size was found to be between 3 -5 nm as calculated by Scherrer equation at <111> crystal plane of the hexagonal crystal structure of ZnSe. Particle size-distribution by dynamic light scattering technique showed narrow-size distribution of the particles within 10 nm. The particles are highly re-dispersible in organic solvents such as n-hexane and toluene thus making the dots useful for opto-electronic devices.
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