Abstract
The ac response of ZnO-based varistors was measured as a function of temperature and applied electric field. Conductivity-frequency measurements indicated that the grain boundaries of the ZnO varistors were amorphous. The device resistance was found to decrease as the temperature/applied field increased. This was attributed to deterioration of the insulating property of the grain boundaries due to generation of conduction carriers in the ZnO grains. As a large amount of these charge carriers passed through the grain boundaries, the ZnO varistors remarkably revealed a non-Debye characteristic that can be modeled by a capacitance to simulate the behavior of the grain boundaries.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
