Synthèse, caractérisation physico-chimique et propriétés de transport de composés de type Mo3Sb7

Abstract : Due to current environmental concerns, a resurgence of interest in thermoelectricity have been witnessed by the last 20 years. The challenge raised by this technology lies in identifying materials that display low thermal conductivity as well as both high electrical conductivity and thermopower. The work presented in this manuscript deals with a thorough study on molybdenum-antimony based complex crystalline structure. To finely control the thermal and electrical properties of these compounds through judicious substitutions and to link up physical and structural properties were at the heart of this in-depth study. Not only did we obtain outstanding results regarding the synthesis and both the chemical and structural characterizations but we also discovered intriguing magnetic and transport properties. Particularly, we emphasized the exotic properties exhibited by the binary Mo3Sb7 compound whose a deep understanding were essential to study the transport properties of the ternary and quaternary alloys. The different substitutions we have considered were found to substantially improve the thermoelectric properties of the Mo3Sb7 compound and thus, led to the synthesis of new prospective thermoelectric materials that surpass the best compounds discovered up-to-now (Si-Ge) and used in power generation applications in the 900 1200 K temperature range
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Christophe Candolfi. Synthèse, caractérisation physico-chimique et propriétés de transport de composés de type Mo3Sb7. Autre. Institut National Polytechnique de Lorraine, 2008. Français. ⟨NNT : 2008INPL041N⟩. ⟨tel-01753022⟩

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