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Thermal and phase stability of skutterudite master alloys for thermoelectric materials

Název česky Termická a fázová stabilita základních skuteruditových slitin pro termoelektrické materiály
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ZELENKA František BROŽ Pavel VŘEŠŤÁL Jan VYKOUKAL Vít BURŠÍK Jiří ROGL Gerda ROGL Peter Franz

Rok publikování 2018
Druh Konferenční abstrakty
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
Popis Skutterudites, especially those based on cobalt and antimony, represent a promising class of materials for thermoelectric applications. The search for suitable doped analogues and advanced preparation techniques is only one part on the route to development of high efficient thermoelectrics, i.e. materials with high ZT- factor and hence with more efficient conversion of the waste heat to electricity [1]. The other part includes the study of the thermal and phase stability as these materials contain volatile elements (Sb, Sr, Yb, etc.), which can evaporate at operation conditions leading to structure changes, damaging the thermoelectric properties. To gain basic information for the study of doped multicomponent skutterudites, the thermal and phase stability of skutterudite CoSb3 master alloys were investigated using thermal analysis and Knudsen effusion mass spectrometry. Results, including data on phase transformations and those from vapour pressure measurements of antimony, supported by powder X-ray diffraction, measurement of diffusion profiles and microstructure observations are summarized and used for evaluation of the long term thermal stability of the materials.
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