PROJECT TITLE :
Frequency effect on electrical fatigue behaviour of lead zirconate titanate ceramics
The frequency effect on the electrical fatigue behaviour of lead zirconate titanate (PZT) ceramics for a micro-actuator of exhausting disk drives has been investigated. The PZT sample was subjected to a bipolar electric field of ±one kV/mm at varied frequencies; 10, fifty, 100 Hz. The fatigue behaviour may be attributed to the domain pinning result and is well quantitatively analysed by using the ferroelectric logarithmic fatigue model. Considerably, it absolutely was found that fatigue degradation is additional severe at low frequency loading. The frequency result on the fatigue behaviour was explained using the viscosity concept.
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