Thermodynamic properties of Sr-Sb alloys via emf measurements using solid CaF2-SrF2 electrolyte

被引：5

作者：

Smith, Nathan D. ^{[1
]}

Orabona, Nicole ^{[1
]}

Lichtenstein, Timothy ^{[1
]}

Gesualdi, Jarrod ^{[1
]}

Nigl, Thomas P. ^{[1
]}

Kim, Hojong ^{[1
]}

机构：

[1] Penn State Univ, Mat Sci & Engn, 406 Steidle Bldg, University Pk, PA 16802 USA

来源：

ELECTROCHIMICA ACTA | 2019年 / 305卷

关键词：

Sr-Sb alloys; Emf method; Sr-Sb phase diagram; Thermodynamic properties; CRYSTAL-STRUCTURE; ANTIMONY;

D O I：

10.1016/j.electacta.2019.02.124

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

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) vertical bar CaF2-SrF2 vertical bar 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 x 10(-13) at 973 K and x(Sr) = 0.03, implying strong chemical interactions. Six intermetallic compounds were confirmed by X-ray diffraction (XRD): SrSb2, Sr2Sb3, Sr11Sb10, Sr16Sb11, Sr5Sb3, and Sr2Sb. 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. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页码：547 / 554

页数：8

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