TY - JOUR
T1 - Thermodynamic properties of Sr-Sb alloys via emf measurements using solid CaF 2 -SrF 2 electrolyte
AU - Smith, Nathan D.
AU - Orabona, Nicole
AU - Lichtenstein, Timothy
AU - Gesualdi, Jarrod
AU - Nigl, Thomas P.
AU - Kim, Hojong
N1 - Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2019/5/10
Y1 - 2019/5/10
N2 - The thermodynamic properties of Sr-Sb alloys were determined by electromotive force (emf) measurements to understand the solution and phase behavior of Sr in Sb. A Sr(s) | CaF 2 -SrF 2 | Sr(in Sb) electrochemical cell was used to measure emf values at 833–1113 K for Sr mole fractions over x Sr = 0.03–0.84. The activity of Sr in liquid Sb was as low as 6.9 × 10 −13 at 973 K and x Sr = 0.03, implying strong chemical interactions. Six intermetallic compounds were confirmed by X-ray diffraction (XRD): SrSb 2 , Sr 2 Sb 3 , Sr 11 Sb 10 , Sr 16 Sb 11 , Sr 5 Sb 3 , and Sr 2 Sb. Phase transition temperatures were verified by differential scanning calorimetry (DSC) for x Sr = 0.03–0.48. Integrating the thermodynamic properties of the Sr-Sb system from emf, XRD, and DSC measurements, three characteristic transition temperatures were newly defined and an experimentally-determined Sr-Sb phase diagram was constructed up to x Sr = 0.50.
AB - The thermodynamic properties of Sr-Sb alloys were determined by electromotive force (emf) measurements to understand the solution and phase behavior of Sr in Sb. A Sr(s) | CaF 2 -SrF 2 | Sr(in Sb) electrochemical cell was used to measure emf values at 833–1113 K for Sr mole fractions over x Sr = 0.03–0.84. The activity of Sr in liquid Sb was as low as 6.9 × 10 −13 at 973 K and x Sr = 0.03, implying strong chemical interactions. Six intermetallic compounds were confirmed by X-ray diffraction (XRD): SrSb 2 , Sr 2 Sb 3 , Sr 11 Sb 10 , Sr 16 Sb 11 , Sr 5 Sb 3 , and Sr 2 Sb. Phase transition temperatures were verified by differential scanning calorimetry (DSC) for x Sr = 0.03–0.48. Integrating the thermodynamic properties of the Sr-Sb system from emf, XRD, and DSC measurements, three characteristic transition temperatures were newly defined and an experimentally-determined Sr-Sb phase diagram was constructed up to x Sr = 0.50.
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U2 - 10.1016/j.electacta.2019.02.124
DO - 10.1016/j.electacta.2019.02.124
M3 - Article
AN - SCOPUS:85063643715
SN - 0013-4686
VL - 305
SP - 547
EP - 554
JO - Electrochimica Acta
JF - Electrochimica Acta
ER -