Influence of Al2O3 Nanoparticles' Incorporation on the Structure and Electrical Properties of Pb0.88Sr0.12Zr0.54Ti0.44Sb0.02O3 Ceramics

Pharatree Jaita,Gobwute Rujijanagul,Chatchai Kruea-In

doi:10.5772/63060

Abstract

In this research, the effects of an Al2O3 nanoparticle additive on the structure and electrical properties of Pb0.88Sr0.12Zr0.54Ti0.44Sb0.02O3 (PSZST) ceramics were investigated. The PSZST ceramics with the addition of 0 – 2.0 vol % Al2O3 were fabricated via a solid-state mixed oxide method and sintering at 1250°C for 2 h to obtain dense ceramics. X-ray diffraction indicated that all compositions exhibited a single perovskite structure. Phase identification showed coexisting mixed rhombohedral and tetragonal phases for the modified ceramics, while the unmodified ceramics showed a rhombohedral-rich phase. The addition of Al2O3 nanoparticles was also found to improve the densification and the electrical properties of the PSZST ceramics, such as dielectric constant and polarization. The 2.0 vol% sample showed the highest low-field piezoelectric coefficient (d33) value of 646 pC/N, which was 90% higher than that of the unmodified sample, suggesting that this composition had the potential to be one of the prom...

Highlights

Lead zirconate titanate (abbreviated to Pb(ZrxTiO1-x)O3 or PZT) ceramics have been studied extensively since their discovery in the 1950s [1,2,3,4]
All calcined powders were characterized via X-ray diffraction patterns (XRD)
The structure was not perfectly ordered and the XRD pattern still presented some peaks of the secondary phase

Summary

Introduction

Lead zirconate titanate (abbreviated to Pb(ZrxTiO1-x)O3 or PZT) ceramics have been studied extensively since their discovery in the 1950s [1,2,3,4] They are well-known materials for various sensors and actuators because of their excellent dielectric and piezoelectric properties (typically, d33 ∼ 300 pC/N and k33 ∼ 0.5) [5]. Zheng et al [10] reported that Sr substitution in Nb-doped PZT ceramics generally had higher dielectric and piezoelectric properties than pure PZT. Such Sr substitutions on the A-site in PZT ceramics tended to shift the MPB composition towards the tetragonal phase. The PSZST/Al2O3 ceramics were expected to exhibit better properties than the single phase of PSZST or Al2O3

Experiment

Results and discussion

Conclusion