|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Phase Stability, Phase Transformations, and Reactive Phase Formation in Electronic Materials XVI
||L-178: Degradation Mechanism of Piezoelectric Materials
||Hooman Sabarou, Yu Michael Zhong
|On-Site Speaker (Planned)
The disappearance of polarization hysteresis characteristics occurs for piezoelectric (PZT) materials so that the performance of the materials is being degraded. To avoid this problem, finding the origin of this issue is necessary. This research approaches to the problem from a new aspect for the first time and mainly focuses on perovskite structure of PZT materials. The several tests have been designed to scrutinize the structural evolution of perovskite under various oxygen partial pressures and temperatures and to simulate working conditions of PZT materials. PZT pellets have been annealed under different temperatures and oxygen partial pressures. The evolution of crystal structure has been studied via XRD. Thermal analysis tests also exhibit changes in perovskite structure and truly justify the degradation in polarization characteristics of PZT materials. The mechanism of the structural evolution is discussed and promoted to real PZT applications.
||Planned: Supplemental Proceedings volume