The Thermodynamic Relations between the Melting Point and the Size of Crystals

The thermodynamic relations between the melting point (MP) and the size of crystals are derived by the use of the Kelvin equation. The results show that the MP depression increases with a decrease in size of a crystal and that there exists the lowest MP when the partial derivative of the surface ten...

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Veröffentlicht in:	Journal of colloid and interface science 2001-11, Vol.243 (2), p.388-390
Hauptverfasser:	Xue, Yongqiang, Zhao, Qingsheng, Luan, Chunhui
Format:	Artikel
Sprache:	eng
Schlagworte:	Chemistry Colloidal state and disperse state dispersed system Exact sciences and technology General and physical chemistry melting point phase transition Physical and chemical studies. Granulometry. Electrokinetic phenomena size of crystals superfine powder surface effect thermodynamic equations ultrafine particles
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Beschreibung
Zusammenfassung:	The thermodynamic relations between the melting point (MP) and the size of crystals are derived by the use of the Kelvin equation. The results show that the MP depression increases with a decrease in size of a crystal and that there exists the lowest MP when the partial derivative of the surface tension with respect to particle radius (∂σ/∂r)T,p=σ/r. If the size of a crystal is not too small then the depression is inversely proportional to the radius.
ISSN:	0021-9797 1095-7103
DOI:	10.1006/jcis.2001.7837