Study of phase transitions and properties of tetragonal (Pb,La)(Zr,Ti)O3 ceramics—I: Phase diagram and β-phase |
| |
Authors: | CGF Stenger AJ Burggraaf |
| |
Institution: | Twente University of Technology, Department of Chemical Engineering, Laboratory of Inorganic Chemistry and Materials Science, P.O. Box 217, 7500 AE Enschede, The Netherlands |
| |
Abstract: | The phase diagram (T?x plot) of thermally depoled tetragonal PLZT materials has been investigated by means of X-ray diffraction, Capacitance and DSC measurements. Materials with a low La content show a classical Fet?PEc transition. This transition has first or second order character, dependent on the Zr/Ti ratio.Materials with a medium and high La content show a diffuse transition from the cubic high temperature phase to a tetragonal, so called β phase. This β phase has no clear FE properties and a spontaneous transition to the FEt phase on lowering the temperature only takes place for materials with a medium La content. For materials with a high La content a spontaneous βt→ FEt transition is not observed. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|