Synthesis and properties of nanostructured GeSb4Te7 prepared by mechanical alloying

Autor:	Z. V. Borges, C.M. Poffo, J.C. de Lima, Daniela Menegon Trichês, Sérgio Michielon de Souza, R.S. de Biasi
Rok vydání:	2018
Předmět:	010302 applied physics Materials science Absorption spectroscopy Mechanical Engineering Analytical chemistry chemistry.chemical_element Pair distribution function Germanium 02 engineering and technology 021001 nanoscience & nanotechnology Thermal diffusivity 01 natural sciences symbols.namesake chemistry Mechanics of Materials Phase (matter) 0103 physical sciences symbols General Materials Science Thermal stability 0210 nano-technology Raman spectroscopy Spectroscopy
Zdroj:	Journal of Materials Science. 53:13451-13463
ISSN:	1573-4803 0022-2461
DOI:	10.1007/s10853-018-2614-8
Popis:	A nanostructured GeSb4Te7 (GST147) phase was produced by mechanical alloying (MA), starting from a mixture with nominal GeSb2Te4 composition of high-purity elemental Ge, Sb and Te powders. The effect of milling on z-coordinates of Wyckoff sites 2c and 2d occupied by the Sb and Te atoms was studied using an approach combining the Rietveld method and pair distribution function analysis. The thermal stability of GST147 and the Raman active modes of GST147 were investigated. The results of photoacoustic absorption spectroscopy show that the thermal diffusivity of nanostructured GST147 produced by MA is similar that of its bulk counterpart.
Databáze:	OpenAIRE
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