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Academic literature on the topic 'Silicium – Recyclage'
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Journal articles on the topic "Silicium – Recyclage"
Saito, Tomoya, Yusei Tsushima, and Hideo Sawada. "Facile creation of superoleophobic and superhydrophilic surface by using fluoroalkyl end-capped vinyltrimethoxysilane oligomer/calcium silicide nanocomposites—development of these nanocomposites to environmental cyclical type-fluorine recycle through formation of calcium fluoride." Colloid and Polymer Science 293, no. 1 (September 13, 2014): 65–73. http://dx.doi.org/10.1007/s00396-014-3387-5.
Full textDissertations / Theses on the topic "Silicium – Recyclage"
Velha, Philippe. "Ingénierie de modes en optique intégrée sur silicium sur isolant." Paris 11, 2008. http://www.theses.fr/2008PA112023.
Full textThis thesis enters upon the localization and the handling of the light at the wavelength scale. The work initially concerned microcavities with high quality factors (Q) integrated on ridge waveguides relying on a substrate (SOI). The optimization of the mirrors thanks to an engineering of mode based on the modes profiles adaptation, permits us to achieve Q factors up to 60000 for a modal volume of 0,6 (lambda/n) ^3. Confinement could be observed by near-field microscopy and we showed that it was possible to control these cavities by a SNOM tip. Lastly, we investigate the slow modes approach by tackling theoretically the issue of the injection of light in slow modes
Abbadie, Alexandra. "Nettoyage chimique humide de surfaces silicium (appliqué au recyclage), nettoyage chimique humide et préparation de surface d'alliages silicium-germanium et de couches de germanium pur." Toulouse 3, 2004. http://www.theses.fr/2004TOU30082.
Full textNdzogha, Cyrille. "Etudes des phénomènes d’échange dans la purification du silicium par plasma et induction." Grenoble INPG, 2005. https://theses.hal.science/tel-01340596.
Full textThis thesis focuses on a plasma process of purification of silicon for photovoltaic applications. It is applied to two types of materials: metallurgical silicon and recycling products from sawing sludge ingots and from wafers of photovoltaic industry. Platelet sawing sludge consist mainly of cutting fluid, SiC particles (abrasive), silicon microparticles and iron micro-particles from the cutting wire. Silicon sludge is a high-purity silicon, which is already of photovoltaic quality. It can represent 60% of the original weight of the ingot. The present process comprises a SiC phase separation by centrifugation, followed by chemical elimination phase of the iron, then a reactive plasma treatment for removing residual SiC. This work deals with this last phase. A more complex treatment than originally planned was made necessary by the existence in the SiC particles of sawing sludge from the initial breaking of the abrasive grains. Separation of SiC is incomplete, the plasma treatment had to remove much larger quantities than originally planned. This required a significant modification of the original process, and the setting of a pre-treatment phase point intended to make it usable by the product of the plasma separation. This work combines theoretical studies, numerical modeling and experimentation. Thermodynamic modeling to determine the best conditions for the removal of pollutants (adapted reactive gases, flow rates, temperatures, pressures) whereas modeling the electromagnetic measurement brewing efficiency renewing the surface of the liquid bath during treatment
Velha, Philippe. "Ingénierie de mode en optique intégrée sur silicium sur isolant." Phd thesis, Université Paris Sud - Paris XI, 2008. http://tel.archives-ouvertes.fr/tel-00292092.
Full textParrochon, Johann. "Supervision de la pression des effluents gazeux dans des équipements semi-conducteurs sous vide." Chambéry, 2005. http://www.theses.fr/2005CHAMS007.
Full textThis work aims at improving equipments used for the microelectronics ; in this case, vacuum pumps manufactured by ADIXEN. Two subjects, which are both related to the use of a variable speed pump, have been studied: a) quality management during the fabrication of integrated circuits, by means of the process chamber pressure regulation, b) recycling of the fluorine gag used for the cleaning of Silicon Oxyde deposition chambers. The first subject deals with pressure regulation by variations in the pump speed, in contrast to the standard way of the regulation by mechanical movements of a valve. We tried to make the variable speed regulation adaptable to every kind of equipment and customer process, by systematising the identification procedure of the pressure dynamical behaviour, and use this procedure to model the whole system. The identification determines a local linear model by means of Random Binary Series, used with the Matlab's Box-Jenkins function. The global modelling relies on the Design of Experiments Method, which enables us to study a large amount of parameters and action variables, expected to have an impact on the pressure dynamics, and thereafter create a procedure to adapt the model to any customer equipment. The second subject aims at making a fluorine gag recycling system, dedicated to the SiO2 deposition chamber clean. Actually, more than 80% of the cleaning species are not being used during the cleaning, and hence are lost. The idea is to rècover this unused part at the chamber exhaust, and inject it back into the chamber, after trapping the chemical reaction by-products. This is a difficult task because as fluorine is a dangerous gag, we had to make the system such as to keep the pressure as low as possible, without preventing the flow control which is essential to match the clean standard conditions
Saidane, Lamia. "Synthèses Fischer Tropsch : Optimisation des paramètres réactionnels en mode lit fixe." Strasbourg, 2009. http://www.theses.fr/2009STRA6150.
Full textIn the GTL process, the FTS is the step which transforms the syngas into liquid HC. In catalysis, the interest of using Co/SiC was demonstrated. This work consists in studying the influence of parameters: Treduction, promoters or the nature of the support on the activity. Modifications of the active phase particles size, its reducibility as well as its crystallinity are followed by diverse characterization techniques: XRD, TPR and SEM. The Ru effect on the Co/SiC system enhanced the Co dispersion and consequently the activity. In order to illustrate the best macroscopic shape of β−SiC (foam, pellets and powder), a comparative study on supports was also realized. A second study deals with the chemical nature of supports eg. SiC, Al2O3/SiC and Al2O3. In term of environmental protection, the base idea of this work was to enhance the catalyst life time by its regeneration and its recycling
Pasternak, Nicolas. "Synthèses de matériaux mésoporeux et nanoparticulaires plus écologiques à base de silicium et titane." Thesis, Cergy-Pontoise, 2017. http://www.theses.fr/2017CERG0911.
Full textSilica and titanium oxides are present in many fields (chemistry, environmental, medical, pharmaceutical, etc…). The main problem of these materials concerns the synthesis financial and environmental costs. In this work, the aim was to solve this problem. A new greener silica oxide nanoparticles synthesis was prepared. These nanomaterials have been analyzed by the conventional characterization methods in material sciences (N2 volumetric adsorption, Thermogravitometric Analysis (TGA),...). The viscoelastic properties of the reaction media were determined by micro-rheology. A strategy for the elimination of non-ionic surfactant families (poloxamers and polyethylene oxide) ) used as template in the synthesis of mesoporous materials based on silica (SBA-n, MSU-X, ....) was also implemented. This procedure allowed to recover the surfactants and to obtain materials with remarkable physicochemical properties identified by the same methods instrumentation. After functionalization of the surface, the washed materials appear to be more efficient in terms of adsorption of organic compounds as their calcined counterparts. Extended to titanium oxide, the washing process seems to produce from a percentage of TiO2 (> 70%) highly reactive materials in photocatalysis and with a high antibacterial power
Brunner, Pierre-Louis Marc. "Dispositifs optoélectroniques à base de semi-conducteurs organiques en couches minces." Thèse, 2015. http://hdl.handle.net/1866/16002.
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