Pattanayak, Pulok and Asokan, S (2005) Signature of a silver phase percolation threshold in microscopically phase separated ternary Ge0.15Se0.85-xAgx (0≤x≤0.20) glasses. In: Journal of Applied Physics, 97 (1). 013515-013515.
PDF
Signature_of_a_silver.pdf - Published Version Restricted to Registered users only Download (747kB) | Request a copy |
Abstract
Temperature modulated alternating differential scanning calorimetric studies show that Se rich Ge0.15Se0.85−xAgx (0 x 0.20) glasses are microscopically phase separated, containing Ag2Se phases embedded in a Ge0.15Se0.85 backbone. With increasing silver concentration, Ag2Se phase percolates in the Ge–Se matrix, with a well-defined percolation threshold at x = 0.10. A signature of this percolation transition is shown up in the thermal behavior, as the appearance of two exothermic crystallization peaks. Density, molar volume, and microhardness measurements, undertaken in the present study, also strongly support this view of percolation transition. The superionic conduction observed earlier in these glasses at higher silver proportions is likely to be connected with the silver phase percolation.
Item Type: | Journal Article |
---|---|
Publication: | Journal of Applied Physics |
Publisher: | American Institute of Physics |
Additional Information: | Copyright of this article belongs to American Institute of Physics. |
Department/Centre: | Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics |
Date Deposited: | 27 Dec 2011 07:53 |
Last Modified: | 27 Dec 2011 07:53 |
URI: | http://eprints.iisc.ac.in/id/eprint/42910 |
Actions (login required)
View Item |