A Raman Investigation of PbZr0.94Ti0.06O3 Ceramics Under High-Pressures
A.G. Souza Filho, P.T.C. Freire, J.M. Sasaki, I. Guedes, J. Mendes, Filho, F.E.A. Melo (Departamento de Fisica, Universidade Federal do Ceara),, E.B. Ara\'ujo, and J.A. Eiras(Universidade Federal de Sao Carlos,, Departamento de Fisica)
TL;DR
This study explores the high-pressure Raman spectra of PbZr0.94Ti0.06O3 ceramics, revealing a complex phase sequence and new structural phases, contributing to understanding the pressure-dependent behavior of Zr-rich PZT materials.
Contribution
It provides the first detailed Raman analysis of PbZr0.94Ti0.06O3 under high pressure, identifying unique phase transitions not observed in similar compositions.
Findings
Identified a phase sequence: rhombohedral, orthorhombic(I), orthorhombic(I') up to 3.7 GPa.
Discovered different phase behavior compared to PbZr0.90Ti0.10O3.
Revealed a complex concentration-pressure phase diagram for Zr-rich PZT.
Abstract
We have investigated the behavior of the PbZr(0.94}Ti(0.06)O3 Raman spectra as a function of Hydrostatic pressures. The new structural phases were identified based on previous works performed in PZT system with different Ti concentrations at room- and high pressures. We showed that PbZr(0.94}Ti(0.06}O3 exhibits a rich phase sequence up to 3.7 GPa: rhombohedral(LT) {0.3 GPa} orthorhombic(I) {2.9 GPa} orthorhombic(I'). This sequence is different from that exhibited by PbZr(0.90)Ti(0.10)O3 suggesting a very interesting concentration-pressure phase diagram for rich Zr PZT system.
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Taxonomy
TopicsAdvanced ceramic materials synthesis · Ferroelectric and Piezoelectric Materials · Microwave Dielectric Ceramics Synthesis