Fig. 2: Design and characterization of the Mg2Ni/n-Zintl thermoelectric contact structures.
From: CALPHAD accelerated design of advanced full-Zintl thermoelectric device
a Calculated vertical section of Ni-Mg3Sb2. b Calculated Gibbs energy for Ni-Mg3Sb2 at 773 K. c Calculated vertical section of Mg2Ni-Mg3Sb2. Background colors in (a–c) represent the target phase area. d Surface morphology and measured contact resistivity (ρc) of Mg2Ni/n-Zintl junction. Background colors in (d) represent the different material layers. e The fitting curve of the interfacial resistivity of Mg2Ni junctions and the change of ρc of Ni junctions aging at 673 K. Inset: Test values of ρc of Mg2Ni junctions during 0–800 H. f Plots of σs versus the root mean square of the aging time at 673 K, showing linear relationships. Background colors in (e) and (f) represent the good range of ρc and the unusable range of σs, respectively. Marks and error bars in (e) and (f) represent the mean value across three repetitions (n = 3) and standard deviation across five repetitions (n = 5), respectively.
