INVESTIGADORES
UREÑA Maria Andrea
congresos y reuniones científicas
Título:
Phase separation in Ag-Ge-Se glasses
Autor/es:
PIARRISTEGUY, A.; RAMONDA, M.; MARIA ANDREA UREÑA; PRADEL, A.; RIBES, M.
Lugar:
Bangalore
Reunión:
Congreso; International Symposium on non oxide and optical glasses; 2006
Resumen:
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 lm
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.