The grain size dependence of high power piezoelectric properties and their variation upon heat generation for Nb doped lead zirconate titanate oxide (PZT)-based ceramics were investigated under high AC electric fields. The temperature rise was found to decrease linearly upon reduction in grain size and was about 40% lower for fine grained ceramic (0.9 μm) compared to coarse grained one (3.0 μm) near the maximum vibration velocity level (0.30 m/s) whereas coercive field displayed a linear increase upon lowering the grain size. Furthermore, a rise in vibration velocity and mechanical quality factor (Qm) under low electric fields was found to correlate with decreasing grain size. Such a trend was explained in terms of the pinning effect of grain boundaries, which is observed to be critical for suppressing heat generation in high power ceramic applications.
|Original language||English (US)|
|Number of pages||4|
|Journal||Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers|
|State||Published - Dec 1 2001|
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)