Institute of Physics of Materials AS CR, v. v. i. > Projects > Thermal and phase stability of advanced thermoelectric materials

Thermal and phase stability of advanced thermoelectric materials

Co-investigatorRNDr. Jiří Buršík, CSc., DSc.
Number of Project17-12844S
AgencyGrantová agentura České republiky
Duration2016-12-31 - 2019-12-30

Anotace
As waste heat can serve as renewable energy if it is converted into electricity by thermoelectric materials, the research in the field of new non-toxic thermoelectrics is of great importance for materials engineering in automotive and aerospace industry, electronics and others. Improvement of thermoelectrics involves their physical properties as well as their long term stability. Skutterudites and half-Heusler alloys are the most promising materials. However, both groups contain constituents, which are volatile at device operation temperatures so that progressing degradation impairs the thermoelectric properties. The innovative aspect of the project is in determination of the vaporization characteristics of volatile components by means of Knudsen effusion mass spectrometry and in study of kinetics of respective processes. These data, together with those on phase equilibria and microstructure are to provide a physically based understanding of degradation processes of macrocrystalline and nano-structured high performance thermoelectrics and a detailed knowledge on their long term stability.

2021

Sopoušek J., Drenčaková D., Brož P., Buršík J., Zemanová A., Roupcová P.: On thermal stability of nanocrystalline Ag-Cu-S powders. J Nanopart Res 23 (2021) 138

Zelenka F., Brož P., Vřešťál J., Buršík J., Zemanová A., Rogl G., Rogl P.: Study of thermal stability of half-Heusler alloys TiFe1.33Sb and TixNb1-xFeSb (x = 0, 0.15) by differential thermal analysis and Knudsen effusion method. CALPHAD 74 (2021) 102292

Zelenka F., Strádal J., Brož P., Vřešťál J., Buršík J., Zemanová A., Rogl G., Rogl P.: Study of thermal stability of n-type skutterudites Sr0.07Ba0.07Yb0.07Co4Sb12 by differential thermal analysis and Knudsen effusion method. CALPHAD 73 (2021) 102258

Yan X., Brož P., Vřešťál J., Vlach J., Buršík J., Mazalová M., Pavlů J., Smetana B., Rogl G., Eiberger M., Grytsiv A., Michor H., Müller H., Giester G., Rogl P.: On the constitution and thermodynamic modeling of the phase diagrams Nb-Mn and Ta-Mn. J. Alloys Comp. 865 (2021) 158715


2020

Chen S., Huang ., Hsu Y., Kroupa A.: Phase Diagram of the Pb-Se-Sn System. J. Electronic Mater. 49 (2020) 4714-4729

Rogl G., Ghosh S., Wang L., Buršík J., Grytsiv A., Kerber M., Bauer E., Mallik R., Chen X., Zehetbauer M., Rogl P.: Half-Heusler alloys: Enhancement of ZT after severe plastic deformation (ultra-low thermal conductivity). Acta Mater. 183 (2020) 285-300

Brož P., Zelenka F., Vřešťál J., Zemanová A., Kroupa A., Buršík J., Svoboda M., Šimoníková L., Pokorný T.: Experimental study and thermodynamic re-assessment of the Co-Sb system. CALPHAD 68 (2020) 101694


2019

Zelenka F., Brož P., Vřešťál J., Buršík J., Rogl G., Grytsiv A., Rogl P.: Study of thermal stability of p-type skutterudites DD0.7Fe3CoSb12 by Knudsen effusion mass spectrometry. RSC Advances 9 (2019) 21451-21459

Brož P., Zelenka F., Sopoušek J., Hejduková M., Sojková T., Zobač O.: Thermal analysis and Knudsen effusion mass spectrometry combined in a specially-adapted commercial skimmer coupled instrument (Netzsch). CALPHAD 65 (2019) 86-92

Buršík J., Buršíková V., Rogl G., Rogl P.: Local mechanical properties of advanced skutterudites processed by various routes. IOP Conf. Ser.: Mater. Sci. Eng. 613 (2019) 012036

Jedličková V., Zemanová A., Kroupa A.: The Thermodynamic Assessment of the Co-Sn System. J. Phase Equil. Diffus. 40 (2019) 21-33

Brož P., Zelenka F., Kohoutek Z., Vřešťál J., Vykoukal V., Buršík J., Zemanová A., Rogl G., Rogl P.: Study of thermal stability of CoSb3 skutterudite by Knudsen effusion mass spectrometry. CALPHAD 65 (2019) 1-7


2018

Rogl G., Buršík J., Grytsiv A., Puchegger S., Soprunyuk V., Schranz W., Yan X., Bauer E., Rogl P.: Nanostructuring as a tool to adjust thermal expansion in high ZT skutterudites. Acta Mater. 145 (2018) 359-368

Buršík J., Buršíková V., Rogl G., Rogl P.: Microstructure and Local Mechanical Properties of Skutterudites with Addition of Metallic Borides. Key Eng. Mater. 784 (2018) 9-14

Rogl G., Grytsiv A., Anbalagan R., Buršík J., Kerber M., Schafler E., Zehetbauer M., Bauer E., Rogl P.: Direct SPD-processing to achieve high-ZT skutterudites. Acta Mater. 159 (2018) 352-363


2017

Sopoušek J., Kryštofová A., Premović M., Zobač O., Polsterová S., Brož P., Buršík J.: Phase diagram prediction, synthesis, characterization, and thermal stability. CALPHAD 58 (2017) 25-33