Original scientific paper

Glass transition in sodium thiosulfate pentahydrate*)

Z. Ogorelec ; Institute of Physics of the University, Zagreb

Abstract

Recent kinetic approaches to the glass formation may be applied to the examination of the large undercoolings characterizing certain materials. Thus the stable undercooling of sodium thiosulfate pentahydrate (STP), as large as seventy Kelvins, is attributed first to the extremely steep dependence of its nucleation frequency upon temperature, and second to the very small value of the fraction of sites in the crystal-melt interface where molecules may preferentially be added and removed. It was found that characteristic parameter a of STP is equal to 0. 7 -0.19, that crytical cooling rate is about 100 K/s and that glass transition occurs around 215 K.

Keywords

Hrčak ID:

327900

URI

https://hrcak.srce.hr/327900

Publication date:

2.8.1977.

Article data in other languages: croatian

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