Investigation of Piezoelectric Properties in Ca-Doped PbBa(Zr,Ti)O3 (PBZT) Ceramics

TL;DR

This study explores how adding calcium improves the piezoelectric properties of a specific ceramic material.

Contribution

The novel contribution is the significant enhancement of piezoelectric properties through small calcium doping in PBZT ceramics.

Findings

Calcium doping increased the piezoelectric coefficient d31 significantly.

Calcium-doped ceramics showed higher electrical permittivity across all temperatures.

The material exhibited a notable remanent polarization.

Abstract

The perovskite-structured materials Pb0.75Ba0.251−xCax(Zr0.7Ti0.3)O3 for x = 1 and 2 at.% were synthesized using the conventional mixed-oxide method and carbonates. Microstructural analysis, performed using a scanning electron microscope, revealed rounded grains with relatively inhomogeneous sizes and distinct grain boundaries. X-ray diffraction confirmed that the materials exhibit a rhombohedral structure with an R3c space group at room temperature. Piezoelectric resonance measurements were conducted to determine the piezoelectric and elastic properties of the samples. The results indicated that a small amount of calcium doping significantly enhanced the piezoelectric coefficient d31. The calcium-doped ceramics exhibited higher electrical permittivity across the entire temperature range compared to the pure material, as well as a significant value of remanent polarization. These findings indicate that the performance parameters of the base material have been significantly improved, making these ceramics promising candidates for various applications.

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