AC (102-3*105 Hz) measurements have been performed on Sawyer premium-quality synthetic quartz oriented along the z axis, in the temperature range between 240 and 1500 K. The samples were both 'as-received' and X-rayed, in the case of the lower-temperature measurements. The results confirm that the conductivity, in the temperature range considered, is essentially due to extrinsic phenomena, i.e. to the dissociation of Al-Na substitutional centres and to the migration process of alkali ions. An interpretative scheme is proposed, which involves the detailed structure of the attractive potential of Na+ ion in the vicinity of an aluminium impurity and the increase in the radius of the z-axis channels in the beta -quartz-to-tridymite transition.
MARTINI, M., PALEARI, A., SPINOLO, G., & VEDDA, A. (1990). NEW HIGH-TEMPERATURE RESULTS ON THE IONIC-CONDUCTIVITY OF QUARTZ AND IMPLICATIONS ON THE TRANSPORT MECHANISMS. JOURNAL OF PHYSICS. CONDENSED MATTER, 2(33), 6921-6927 [10.1088/0953-8984/2/33/004].
Citazione: | MARTINI, M., PALEARI, A., SPINOLO, G., & VEDDA, A. (1990). NEW HIGH-TEMPERATURE RESULTS ON THE IONIC-CONDUCTIVITY OF QUARTZ AND IMPLICATIONS ON THE TRANSPORT MECHANISMS. JOURNAL OF PHYSICS. CONDENSED MATTER, 2(33), 6921-6927 [10.1088/0953-8984/2/33/004]. | |
Tipo: | Articolo in rivista - Articolo scientifico | |
Carattere della pubblicazione: | Scientifica | |
Titolo: | NEW HIGH-TEMPERATURE RESULTS ON THE IONIC-CONDUCTIVITY OF QUARTZ AND IMPLICATIONS ON THE TRANSPORT MECHANISMS | |
Autori: | MARTINI, M; PALEARI, A; SPINOLO, G; VEDDA, A | |
Autori: | ||
Data di pubblicazione: | 1990 | |
Lingua: | English | |
Rivista: | JOURNAL OF PHYSICS. CONDENSED MATTER | |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1088/0953-8984/2/33/004 | |
Appare nelle tipologie: | 01 - Articolo su rivista |