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We report on thermal measurements of molten materials at the nanoliter scale. An experimental setup of Photothermal Radiometry (PTR), formerly developed for solid state measurements, has been adapted for this purpose. The material is a chalcogenide glass-type tellurium alloy, Ge2Sb2Te5 (GST), amorphous at room temperature, and that becomes crystalline at 130°C. The same material, brought to its melting temperature Tm, about 600°C, becomes amorphous after rapid cooling. Since the liquid is the precursor phase of the amorphous state, its characterization is of paramount importance. Thin film PTR characterization was first performed in solid state by measuring the GST thermal conductivity evolution during the structural phase changing, from the amorphous phase to its crystalline phase. In order to characterize the melt at high temperature, a lightly Ge-doped Te alloy sample was secondly …
Springer, Berlin, Heidelberg
Publication date: 
1 Jan 2012

A Cappella, J-L Battaglia, V Schick, A Kusiak, C Wiemer, M Longo, B Hay

Biblio References: 
Pages: 273-283
Materials Challenges and Testing for Supply of Energy and Resources