A NMR, conductivity and molecular dynamics study of AgI-Ag₂O-B₂O₃ glasses

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In this Subject: <a title="Inorganic Chemistry" href="/content/subcat?j_subject=167&j_availability=">Inorganic Chemistry
By this author: Mustarelli, Piercarlo ;&nbsp; Tomasi, Corrado ;&nbsp; <a href="/search?option2=author&value2=del+Pilar+Infante+Garc%26%23237%3ba++Mar%26%23237%3ba">del Pilar Infante Garc&#237;a, Mar&#237;a ;&nbsp; Magistris, Aldo

Authors: Mustarelli, Piercarlo; Tomasi, Corrado; del Pilar Infante García, María; Magistris, Aldo

Source: Physics and Chemistry of Glasses - European Journal of Glass Science and Technology Part B, Volume 47, Number 4, August 2006 , pp. 484-488(5)

Publisher: Society of Glass Technology

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Abstract:

Fast ion conducting (FIC) AgI-based borate glasses xAgI:(1−x)[Ag₂O.nB₂O₃] (n=1, 2) were studied by means of ¹⁰⁹Ag solid-state NMR, impedance spectroscopy (IS) and molecular dynamics (MD) simulations. Diffusion coefficients in the range 10⁻⁸-10⁻¹⁰ cm²/s were obtained from conductivity data by means of the Nernst-Einstein equation. The activation energies for NMR line narrowing and d.c. conductivity differ by a factor of approximately ∼3. Standard (ST) and non-equilibrium (NE) MD investigations suggest that this difference is due to the effect of cooperative processes.

Document Type: Research article

Publication date: 2006-08-01