Entropic Stabilization and Retrograde Solubility in Zn4Sb3

Details Entropic Stabilization and Retrograde Solubility in Zn4Sb3 Entropic Stabilization and Retrograde Solubility in Zn4Sb3

2010-10-22

arxiv.org/abs/1010.4795v1

Physics

Condensed Matter

Materials Science

5 pages, 5 figures

Scientific paper

10.1103/PhysRevB.83.094106

Zn4Sb3 is shown to be entropically stabilized versus decomposition to Zn and ZnSb though the effects of configurational disorder and phonon free energy. Single phase stability is predicted for a range of compositions and temperatures. Retrograde solubility of Zn is predicted on the two-phase boundary region between Zn4Sb3 and Zn. The complex temperature dependent solubility can be used to explain the variety of nanoparticle formation observed in the system: formation of ZnSb on the Sb rich side, Zn on the far Zn rich side and nano-void formation due to Zn precipitates being reabsorbed at lower temperatures.

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