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Synthèse électrochimique et caractérisation d'un matériau thermoélectrique : le tellurure de bismuth

Abstract : This statement shows that an electrochemical synthesis is possible for bismuth-tellerium alloys developping thermoelectrics proprieties. The analytical study proves the direct electroformation of near stoichiometric bismuth telluride compounds. This result sets up an intensiostatic process, connected to the approach of an industrial proceeding. The stoichiometry is studied according to the thickness, the solution composition, the applied current density and the support electrode. A same study on the compounds growth shows that the texture is directly connected to the stoichiometry and thus to the current density. The physico-chemical, electrical and thermoelectrical caracterisations are done according to the thickness and the stoichiometry. The electrical resistivity and the thermoelectric power are measured by high technology. Measurement of the Hall effect are realised according to the temperature. A short study on bismuth-tellurium-selenium compounds shows the possibilities of this kind of electrodeposition process for ternaries thermoelectrics compounds
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Submitted on : Tuesday, April 24, 2018 - 3:47:01 PM
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Pierre Magri. Synthèse électrochimique et caractérisation d'un matériau thermoélectrique : le tellurure de bismuth. Chimie. Université Paul Verlaine - Metz, 1995. Français. ⟨NNT : 1995METZ048S⟩. ⟨tel-01775913⟩



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