alexa Behavior of Current Flow on Lead Zirconate Titanate Surfaces during Mechanical Impact
ISSN:2321-6212

Research & Reviews: Journal of Material Sciences
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Research Article

Behavior of Current Flow on Lead Zirconate Titanate Surfaces during Mechanical Impact

Aman A1*, Majcherek S1 , Schmidt MP1, Oseev A1, Engel C1 and Hirsch S2

1Packaging Group, Institute of Micro- and Sensor Technology, Magdeburg University, Germany

2Department of Electrical Engineering, Brandenburg University of Applied Sciences, Germany

*Corresponding Author:
Aman A, Packaging Group
Institute of Microand Sensor Technology
Magdeburg University, Germany
Tel: +49 391 6701
E-mail: [email protected]

Received: 01/09/2015 Accepted: 06/01/2016 Published: 13/01/2016

 

Abstract

A new mechanical stress detection technique, based on current flow at Lead Zirconium Titanate (PZT) surfaces, is described in this paper. The current flow properties of PZT were characterized by use of a tungsten indenter. The tungsten indenter was dropped from a certain height and caused mechanical impact at the PZT-sample. The tungsten pin achieved direct contact with the upper surface of the ferroelectric specimen during the impact. This procedure allowed measurements of electrical current that flew between the PZT-surface and the tungsten pin. It was shown that ferroelectric domain switching on PZT surface and plastic deformation generates this current flow during action of loading force. The current flow disappeared in a few microseconds after removal of the loading force. The measurements were carried out using different areas of force application on the PZT surface. The mechanical stress, induced by the collision, was transmitted through the sample and generated also a measureable dipole moment. In this way it was shown that PZT exhibits high sensitivity against mechanical stress by means of electrical current flow, compared to typical dipole moment measurements. This specific material property of PZT-ceramics can be used for new mechanical stress sensor designs with higher sensitivity as normal used bulky PZT-sensors.

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