|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Phase Stability, Phase Transformations, and Reactive Phase Formation in Electronic Materials XVI
||Thermodynamic Study on PMN-PT Single Crystals
||Hooman Sabarou, Yu Michael Zhong
|On-Site Speaker (Planned)
A new thermodynamic approach on the structural evolution of Pb(Mg1/3Nb2/3)O3-xPbTiO3 (PMN-PT) single crystal has been presented, and it is used to justify the inconsistency of the ferroelectric properties of single-crystal perovskite. A series of experimental tests under different temperatures and oxygen partial pressures has been applied to simulate the required working conditions of these materials. The phase stability and structural changes have been scrutinized via X-ray diffraction and thermogravimetric methods. The involved mechanisms for crystal symmetry changes and stabilizing perovskite structure clearly explain the degradation of the piezoelectric properties of the single crystals and competently match with their electric polarization measurements. The thermodynamic approach discusses the origin of the polarization hysteresis degradation and provides conditions to save ferroelectric properties.
||Planned: Supplemental Proceedings volume