DC and AC (102-105 Hz) conductivity measurements both parallel and perpendicular to the z-axis have been performed on synthetic quartz (Sawyer PQ) extending the temperature range up to 950° C. In the lower temperature range (250 < T < 500° C) as-received samples show an activation energy for the process of AC conduction in the z-direction, E = 1.32 eV while at higher temperatures (500 < T < 950° C), a lower energy is found, E = 0.67 eV. Experimental results concerning electrodiffused samples (either "vacuum swept out" and "Na swept in") have also been considered. The interpretation proposed for the ionic conduction mechanism is consistent both with AC and DC data, considers a wide T range, and allows a comprehensive view of the ionic transport in quartz. © 1988.
Lazzari, S., Martini, M., Paleari, A., Spinolo, G., Vedda, A. (1988). DC AND AC IONIC-CONDUCTIVITY IN QUARTZ - A NEW HIGH-TEMPERATURE MECHANISM AND A GENERAL ASSESSMENT. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION B, BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 32(1-4), 299-302 [10.1016/0168-583X(88)90227-3].
DC AND AC IONIC-CONDUCTIVITY IN QUARTZ - A NEW HIGH-TEMPERATURE MECHANISM AND A GENERAL ASSESSMENT
MARTINI, MARCO;PALEARI, ALBERTO MARIA FELICE;SPINOLO, GIORGIO MARIO;VEDDA, ANNA GRAZIELLA
1988
Abstract
DC and AC (102-105 Hz) conductivity measurements both parallel and perpendicular to the z-axis have been performed on synthetic quartz (Sawyer PQ) extending the temperature range up to 950° C. In the lower temperature range (250 < T < 500° C) as-received samples show an activation energy for the process of AC conduction in the z-direction, E = 1.32 eV while at higher temperatures (500 < T < 950° C), a lower energy is found, E = 0.67 eV. Experimental results concerning electrodiffused samples (either "vacuum swept out" and "Na swept in") have also been considered. The interpretation proposed for the ionic conduction mechanism is consistent both with AC and DC data, considers a wide T range, and allows a comprehensive view of the ionic transport in quartz. © 1988.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
