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Article Dans Une Revue Journal of Non-Crystalline Solids Année : 2007

Phase separation in Ag-Ge-Se glasses

Résumé

Field emission-scanning electron microscopy (FE-SEM) and electric force microscopy (EFM) measurements were carried out on bulk Agx(Ge0.25Se0.75)100-x glasses with x = 5 and 15 at.%. The presence of chemical contrasts and electrical inhomogeneity throughout the samples indicated that the glasses were phase separated. Moreover it appears that while silver-rich nodules of ~1 µm were embedded in a silver-poor connecting phase in the glass containing 5 at.% Ag, it was the opposite that occurred in the glass containing 15 at.% Ag. Such an inversion explains the large difference of seven orders of magnitude in the conductivity of the two glasses.

Dates et versions

hal-00162994 , version 1 (16-07-2007)

Identifiants

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Andrea Piarristeguy, Michel Ramonda, Andrea Ureña, Annie Ap Pradel, Michel Ribes. Phase separation in Ag-Ge-Se glasses. Journal of Non-Crystalline Solids, 2007, 353, pp.1261. ⟨10.1016/j.jnoncrysol.2006.09.065⟩. ⟨hal-00162994⟩
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