INVESTIGADORES
ALDAO celso Manuel
artículos
Título:
Thermionic, Tunneling, and Polarization Currents in Zinc Oxide Varistors
Autor/es:
M.S. CASTRO; C.M. ALDAO
Revista:
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Editorial:
ELSEVIER SCI LTD
Referencias:
Lugar: Amsterdam; Año: 1997 vol. 17 p. 1533 - 1537
ISSN:
0955-2219
Resumen:
We report an analysis of time, voltage, and temperature dependencies for ZnO varistors conductance. The conduction mechanisms proposed to interpret experiments include thermionic, tunneling, and polarization currents. We analyze here the contributions of these mechanisms to conduction in order to identify their roles. We conclude that a tunneling current shows the correct trends in the current-temperature curve. Also, capacitance measurements as a function of time and temperature are presented to discuss the influence of interface and deep bulk traps.
