Mechanical spectroscopy allows the investigation of the relaxation processes, associated with the hopping of mobile ions occurring in ionic glasses well below their glass transition temperature. in the present work we study the properties of the secondary mechanical relaxation in the fast ion conducting glass (Agl)(x)[(Ag2O)center dot n(B2O3)](1-x) with n = 2 and x = 0.6 as revealed by ultrasonic measurements at MHz frequencies in a wide temperature range. We analyze the results in comparison with the features observed per-forming broadband dielectric measurements on the same materials. The electric response is discussed in terms of complex electric modulus. This formalism allows us to point out interesting analogies with the ultrasonic results. (C) 2009 Elsevier B.V. All rights reserved.
Mechanical relaxation in a ternary silver borate below the glass transition temperature and corresponding features of the electrical response
Rocca, Francesco
2009-01-01
Abstract
Mechanical spectroscopy allows the investigation of the relaxation processes, associated with the hopping of mobile ions occurring in ionic glasses well below their glass transition temperature. in the present work we study the properties of the secondary mechanical relaxation in the fast ion conducting glass (Agl)(x)[(Ag2O)center dot n(B2O3)](1-x) with n = 2 and x = 0.6 as revealed by ultrasonic measurements at MHz frequencies in a wide temperature range. We analyze the results in comparison with the features observed per-forming broadband dielectric measurements on the same materials. The electric response is discussed in terms of complex electric modulus. This formalism allows us to point out interesting analogies with the ultrasonic results. (C) 2009 Elsevier B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
