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Current leakage and transients in ferroelectric ceramics under high humidity conditions

Current leakage and transients in ferroelectric ceramics under high humidity conditions
Current leakage and transients in ferroelectric ceramics under high humidity conditions
Lead zirconate titanate (PZT) is widely used in electromechanical devices such as ultrasonic transducers, sensors, ultrasonic motors, actuators and resonators. In harsh operating environments such as high humidity and high temperature the electrical resistance of the ceramic can decrease resulting in leakage currents. These can have a significant impact on device performance, particularly for low power applications. In this paper, the increase in leakage current is investigated and characterised under high humidity conditions. It is observed that the leakage current does not evolve smoothly over time, but is characterised by current transients. Detailed measurements of these current transients are reported, and their relationship to the conduction processes in the ceramic is investigated. A mechanism of conductive channel formation is proposed to account for the leakage current increase and current transients
lead zirconate titanite, electrical degradation, current transients, electrical breakdown
0924-4247
1-25
Zheng, Deyi
6866b5ef-f49f-4d32-b591-e4423481b926
Swingler, Jonathan
c6e2a49e-fadd-4f38-99f7-0ee1e2c92fac
Weaver, Paul
649cbff1-3909-4d09-bab6-79ef325089d0
Zheng, Deyi
6866b5ef-f49f-4d32-b591-e4423481b926
Swingler, Jonathan
c6e2a49e-fadd-4f38-99f7-0ee1e2c92fac
Weaver, Paul
649cbff1-3909-4d09-bab6-79ef325089d0

Zheng, Deyi, Swingler, Jonathan and Weaver, Paul (2010) Current leakage and transients in ferroelectric ceramics under high humidity conditions. Sensors and Actuators A: Physical, 1-25. (doi:10.1016/j.sna.2009.10.021).

Record type: Article

Abstract

Lead zirconate titanate (PZT) is widely used in electromechanical devices such as ultrasonic transducers, sensors, ultrasonic motors, actuators and resonators. In harsh operating environments such as high humidity and high temperature the electrical resistance of the ceramic can decrease resulting in leakage currents. These can have a significant impact on device performance, particularly for low power applications. In this paper, the increase in leakage current is investigated and characterised under high humidity conditions. It is observed that the leakage current does not evolve smoothly over time, but is characterised by current transients. Detailed measurements of these current transients are reported, and their relationship to the conduction processes in the ceramic is investigated. A mechanism of conductive channel formation is proposed to account for the leakage current increase and current transients

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More information

Published date: March 2010
Keywords: lead zirconate titanite, electrical degradation, current transients, electrical breakdown

Identifiers

Local EPrints ID: 71779
URI: http://eprints.soton.ac.uk/id/eprint/71779
ISSN: 0924-4247
PURE UUID: e72c4249-de3d-400b-974b-cba9ae971e6c

Catalogue record

Date deposited: 05 Jan 2010
Last modified: 13 Mar 2024 20:45

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Contributors

Author: Deyi Zheng
Author: Jonathan Swingler
Author: Paul Weaver

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