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Entropic Stabilization and Retrograde Solubility in Zn4Sb3

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arxiv 1010.4795 v1 pith:FAJ5ROSL submitted 2010-10-22 cond-mat.mtrl-sci

Entropic Stabilization and Retrograde Solubility in Zn4Sb3

Gregory S. Pomrehn , Eric S. Toberer , G. Jeffrey Snyder , Axel van de Walle This is my paper
classification cond-mat.mtrl-sci
keywords formationsolubilityzn4sb3predictedretrograderichsidetemperatures
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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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